#  @w2aew w2aew w2aew posts on YouTube about tek, how to, tutorial, youtube the most. They currently have [-------] followers and [---] posts still getting attention that total [-----] engagements in the last [--] hours. ### Engagements: [-----] [#](/creator/youtube::UCiqd3GLTluk2s_IBt7p_LjA/interactions)  - [--] Week [-----] -2.90% - [--] Month [------] +3.80% - [--] Months [-------] +26% - [--] Year [-------] +100% ### Mentions: [--] [#](/creator/youtube::UCiqd3GLTluk2s_IBt7p_LjA/posts_active)  - [--] Month [--] -20% - [--] Months [---] +21% - [--] Year [---] +253% ### Followers: [-------] [#](/creator/youtube::UCiqd3GLTluk2s_IBt7p_LjA/followers)  - [--] Week [-------] no change - [--] Month [-------] +0.44% - [--] Months [-------] +2.30% - [--] Year [-------] +5.60% ### CreatorRank: [---------] [#](/creator/youtube::UCiqd3GLTluk2s_IBt7p_LjA/influencer_rank)  ### Social Influence **Social category influence** [technology brands](/list/technology-brands) [social networks](/list/social-networks) [finance](/list/finance) [countries](/list/countries) [stocks](/list/stocks) **Social topic influence** [tek](/topic/tek) #1359, [how to](/topic/how-to), [tutorial](/topic/tutorial), [youtube](/topic/youtube), [code](/topic/code), [in the](/topic/in-the), [kit](/topic/kit), [gain](/topic/gain) #1972, [this is](/topic/this-is), [build](/topic/build) **Top accounts mentioned or mentioned by** [@hamradioduo](/creator/undefined) [@soldersmokevideos](/creator/undefined) [@philslab](/creator/undefined) **Top assets mentioned** [Diodes Inc (DIOD)](/topic/$diod) ### Top Social Posts Top posts by engagements in the last [--] hours "#161: Circuit Fun: a simple RF detector / demodulator probe for DMM or scope This video describes a simple RF demodulator / detector probe that you can use with your DMM or oscilloscope to measure the relative amplitude of an RF signal in your circuit. It is very useful for tuning or adjusting IF stages during alignment filter responses peaking RF circuits and examining amplitude modulation characteristics. The video describes the circuit and its operation and demonstrates how to use it and the typical results you'll achieve. It uses a pair of 1N34A Germanium diodes but could also be built" [YouTube Link](https://youtube.com/watch?v=C8SKiyJUAlU) 2014-07-20T15:22Z 226K followers, 130.7K engagements "#83: Basics of RF Mixers in Radio Receivers / Mixer Tutorial / Frequency Conversion This video describes the basic properties of RF mixers in the context of using them for frequency conversion/translation such in the application of a radio receiver. The input and output signals are shown on the oscilloscope and the spectrum of the output is also shown illustrating the various frequency components that are produced by the mixing process. The concept of IF filtering in a receiver is also illustrated. The video does not go into the design of mixers the different types of mixers or how to select" [YouTube Link](https://youtube.com/watch?v=Mm7WfVzr1ao) 2013-03-09T04:26Z 226K followers, 191.2K engagements "#312: Back to Basics: What is a VNA / Vector Network Analyzer This video presents the basic definition of a vector network analyzer (VNA) a practical view of how some of the measurements are performed and an introduction to some of the common measurements that are made. A few examples VNAs are shown. Knowledge of transmission lines reflections VSWR etc. is helpful but not required for this video. Here are several additional video links that may be helpful: Directional Coupler videos: https://www.youtube.com/watchv=iBK9ZIx9YaY https://www.youtube.com/watchv=byF1FLdbUiA Transmission lines" [YouTube Link](https://youtube.com/watch?v=Sb3q8f0NBZc) 2020-06-06T04:06Z 226K followers, 204.7K engagements "#403: Measuring a Directional Coupler with a SV4401A VNA This video shows the process of setting up calibrating and using a SV4401A Vector Network Analyzer to characterize the Return Loss (Reflection Coefficient) VSWR Mainline Loss (Transmission Coeff) Coupling Ratio and Directivity of a Mini-Circuit ZFDC-20-5+ directional coupler over a 100kHz to 2GHz frequency range. 00:00 Introduction 00:28 Review of Measurements of a Directional Coupler 02:14 Specifications of the Mini Circuit ZFDC-20-5+ 03:53 Setup VNA Frequency Range 04:17 Calibration Considerations 05:17 Calibration Process 07:00 Setup" [YouTube Link](https://youtube.com/watch?v=uGSCXYTdFnM) 2025-09-10T03:41Z 226K followers, [----] engagements "#136: What is a dB dBm dBu dBc etc. on a Spectrum Analyzer This tutorial video gives the basics of the typical amplitude units used on a spectrum analyzer. It gives a basic description of the electronic definition of the decibel (dB) some of the properties of the dB why it is used. It describes that the dB is a relative measurement. These relative measurements can be expressed as absolute measurements when a known reference is used/implied. This is where the terms dBm dBu dBmv etc. come from. Finally the term dBc is described. Each of the descriptions is followed with practical examples and" [YouTube Link](https://youtube.com/watch?v=1mulRI-EZ80) 2014-03-23T06:17Z 226K followers, 397K engagements "#37: Use a scope to measure the length and impedance of coax This video shows one way to use a scope and function generator to measure the length of a piece of coax transmission line as well as estimate its impedance. It uses a "poor man's TDR" type of measurement by launching a pulse into the coax and measuring how long it takes to return after being reflected by the open circuit end. This same technique can be used to determine the distance to a fault (open or short). A simple method for determining the impedance of the line is also shown. This video touches briefly on transmission line and" [YouTube Link](https://youtube.com/watch?v=Il_eju4D_TM) 2012-03-09T04:31Z 226K followers, 238.6K engagements "#366: Back to Basics: Basics of the Bipolar Transistor - NPN and PNP NOTE: The horizontal axis of the characteristic curve plot were mislabeled as Vbe instead of Vce in one or two spots. The downloadable video notes have been corrected. This is a back-to-basics tutorial video on the bipolar junction transistor or BJT. While there are just two basic types (NPN and PNP) the video mainly discusses NPN types. It reviews the schematic symbol typical pinouts & basic operating principles of linear and switch operation. We dip our toe into the physics a little bit and then do some experiments on the" [YouTube Link](https://youtube.com/watch?v=IrAUC4ZoNYY) 2023-03-11T05:05Z 226K followers, 47.4K engagements "#167: How a Diode Ring Mixer works Mixer operation theory and measurement This video describes how a classic double-balanced diode-ring mixer operates. Very basic mixer theory is quickly reviewed which describes how the sum and difference of the LO (local oscillator) and RF (Radio Frequency) inputs are generated at the IF (intermediate frequency) output. It is also noted that the sum and differences of the harmonics of the LO and RF are also present at the IF output. Math waveforms on the oscilloscope are used to illustrate the operation of the mixer and the actual waveforms from the mixer" [YouTube Link](https://youtube.com/watch?v=junuEwmQVQ8) 2014-08-13T23:45Z 226K followers, 176.2K engagements "#401: Tool Time: What is a Wiggy Ans: A Solenoid-type Voltage Tester Taking a bit of a departure from electronics - this video introduces a tool that is very popular with electricians - the Wiggy a solenoid-type AC/DC voltage tester with some very interesting features and characteristics. W2AEW Tek Tektronix Square D Wiggy AC DC voltage tester W2AEW Tek Tektronix Square D Wiggy AC DC voltage tester" [YouTube Link](https://youtube.com/watch?v=LLpHE6dW1pI) 2025-07-13T02:41Z 226K followers, 12.2K engagements "#379: How to measure coax loss using a NanoVNA This video shows how to setup your NanoVNA to measure coax loss using an S21 measurement on a VNA. I show the setup and calibration process as well as some actual measurements of a few lengths of RG-174 and RG-316 coax that I use for my portable (POTA) HF operating. More info on the custom NanoVNA stand here: https://forums.qrz.com/index.phpthreads/3d-printed-stand-for-nanovna-h4-w-small-tray-your-call-sign.861698/ 00:00 Introduction 00:18 Credit and Inspiration for the video 00:54 Coax samples to be measured 01:24 Hardware setup for calibration" [YouTube Link](https://youtube.com/watch?v=OSw9Epu4nu0) 2023-12-23T22:56Z 226K followers, 47.6K engagements "#9: Basic 1X and 10X Oscilloscope Probe tutorial This video discusses what 1X and 10X probes are and how using 1X and 10X passive probes to connect your oscilloscope to your circuit will affect the circuit and the frequency response. It discusses why 1X or 10X probes are used and how to properly compensate 10X probes. PDF of video notes can be found here: http://www.qsl.net/w/w2aew//youtube/1x_10x_scope_probe_basics.pdf W2AEW Oscilloscope Tektronix 10X probe compensation capacitance W2AEW Oscilloscope Tektronix 10X probe compensation capacitance" [YouTube Link](https://youtube.com/watch?v=SX4HGNWBe5M) 2011-06-07T01:48Z 226K followers, 247.2K engagements "#369: How to install a crimp-on BNC connector to RG-316 RG-174 etc. coax This video shows how to install a crimp-on style BNC connector onto RG-316 coaxial cable or other 0.100" OD coax such as RG-174 RG-188 Belden [-----] [-----] [-----] etc. The connectors used here were purchased from Max-Gain Systems in Marietta GA (no sponsorship or other relationship to W2AEW). I found their prices to be good and quality of the connectors appears to be very good. Their website is: http://www.mgs4u.com The particular connector used in the video is their p/n: 7005-BNC-174 W2AEW Tek Tektronix BNC repair" [YouTube Link](https://youtube.com/watch?v=fbLDbB2u0pc) 2023-06-21T03:25Z 226K followers, 55.1K engagements "#230: How to install a BNC connector on RG-58 coax DIY Repair This short video shows how to install a crimp style BNC connector onto RG-58 [--] ohm coax. Installation of other crimp style coaxial connectors will be similar. Note that the connectors are specific to the type of coax being used and having the correct crimping tool is really a necessity. You can optionally (carefully) solder the center pin and optionally finish up with some heat shrink tubing for clean professional look. W2AEW Tek Tektronix coax coaxial coaxial cable BNC BNC connector [--] ohm coax crimp crimper jumper cable repair" [YouTube Link](https://youtube.com/watch?v=ktQVwfo-s9w) 2016-02-06T15:46Z 226K followers, 797.7K engagements "#314: How to use the NanoVNA to sweep / measure an antenna system's SWR and optimize its tuning This video briefly shows how to setup and use the NanoVNA to sweep an antenna system (antenna transmission line transmatch etc.) to measure its VSWR Reflection Coefficient etc. and then shows how you can use it to monitor the tuning behavior as you make adjustments. The basic steps include: - Setting the traces that you want to display (SWR Smith S11) - Setting the frequency range - Running a Calibration - Making the sweep - Using Markers Please see my previous videos on the VNA Smith Chart" [YouTube Link](https://youtube.com/watch?v=xa6dqx9udcg) 2020-06-21T04:30Z 226K followers, 414.6K engagements "#111: How to make a high performance oscilloscope probe socket This short video shows a simple way to make a very high performance socket to connect your oscilloscope probe to your circuit. It features very low ground inductance which minimizes distortion thus preserving signal integrity. In a previous video: http://www.youtube.com/watchv=zodpCuxwn_o I showed the effects of ground inductance on the measured waveform quality. This socket design minimizes ground inductance so that signal integrity is preserved even a high frequencies. This method can be adapted to different probe styles and" [YouTube Link](https://youtube.com/watch?v=-4q8geE5ef8) 2013-09-18T02:20Z 220K followers, 45.6K engagements "#350: Adding AGC (automatic gain control) to my QCX+ CW Transceiver kit Bench project - adding an AGC function to the QRP-Labs QCX CW Transceiver. We take a look at the QCX circuit to see where the AGC will be applied and review the AGC circuit itself. We take a listen to the receiver without the AGC installed and then again after it is installed. For more information see the links below: QRP-Labs website - great amateur radio kits including QCX: https://www.qrp-labs.com/ Here are a few of the QCX kits available: https://www.qrp-labs.com/qcxp.html https://www.qrp-labs.com/qcxmini.html .and" [YouTube Link](https://youtube.com/watch?v=0b1m8txJki8) 2022-03-10T04:54Z 208K followers, 18.9K engagements "#392: Schematic Basics: Multi-position switches in Simpson [---] VOM and Realistic DX-160 Receiver This video describes how to read and interpret the operation of multi-wafer multi-position switches that are commonly found in older electronics (before electronic switching of everything). Two different graphic representation of these switches are shown and described using the schematic for a Simpson [---] Model [--] VOM and a Realistic 5-Band Shortwave Receiver. w2aew Tek Tektronix Simpson [---] schematic realistic dx-160 switches wafer w2aew Tek Tektronix Simpson [---] schematic realistic dx-160" [YouTube Link](https://youtube.com/watch?v=0n05F2bVIzs) 2024-09-28T03:34Z 226K followers, [----] engagements "#288: Comparing XY Mode on Analog and Digital Oscilloscopes This video compares the difference in performance of the XY mode of analog CRT based oscilloscopes vs. digital scopes. The circuit being used to generate the X and Y waveforms is a fun little board made by VintageTEK and is available on ebay: Note that the stock of this board sold out very quickly. VintageTek has responded by building a new batch of boards As a bonus these new boards include a 2nd function - a table-tennis game very similar to one of the original TV video games. Here is the link to the NEW and IMPROVED board:" [YouTube Link](https://youtube.com/watch?v=1tTeXPmbxW0) 2018-08-05T13:43Z 215K followers, 46.9K engagements "#228: Radio Fun: Michigan Mighty Mite CW transmitter and a low pass filter The Michigan Mighty Mite is a very simple crystal controlled CW transmitter that uses very few parts is easy to build and a fun little ham radio project. Simplicity comes at a price and that price is harmonic distortion. A low pass filter is shown that helps to dramatically reduce the distortion. This Mite is built with a 3.579MHz "color burst" crystal. Inspiration for building the Mighty Mite came from the Soldersmoke blog and podcast. More information can be found at the following links: Lots of pages on the Michigan" [YouTube Link](https://youtube.com/watch?v=2AdW9Zpl2Es) 2016-01-27T14:44Z 220K followers, 114.1K engagements "#72: Simple Station Monitor for Ham Radio using an Oscilloscope This short video shows a very simple way to hook up an oscilloscope to use it as an RF Signal Monitor to observe the RF envelope from your ham radio transmitter. It shows how you can use the stray RF coupling that exists between the RF path inside of your tuner to one of the unused ports in the tuner as a simple no-cost RF sampler to couple the signal into your oscilloscope. BE ABSOLUTELY SURE that you do NOT transmit directly into your oscilloscope - that is a sure way to DAMAGE your scope" [YouTube Link](https://youtube.com/watch?v=2D83xp3H5Bo) 2012-12-28T19:12Z 222K followers, 125.1K engagements "#80: MFJ Cub 40m QRP CW Transceiver circuit walk-thru and review plus bandsweep ham radio MFJ-9340 I assembled this MFJ-9340 Cub QRP CW transceiver for 40m for my friend Gerry - N2GJ. It's a very pleasant kit to build. All surface mount components are already mounted on the board. Assembly involves soldering the through hole components and winding two toroidal coils. For me the assembly took one evening and the alignment took another evening. The video goes through the block diagram of the transceiver then walks through the schematic describing the function of each circuit. The transceiver" [YouTube Link](https://youtube.com/watch?v=2QSwXv2RJzw) 2013-02-17T22:50Z 216K followers, 37.7K engagements "#236: Using a Current Shunt with a Panel Meter / Ammeter scale change This video gives you the basics of how to calculate and use a simple resistive current shunt with an analog panel meter to change the current that is needed for a full scale deflection. The notes page for this video can be found here: http://www.qsl.net/w2aew/youtube/CurrentShunt.pdf" [YouTube Link](https://youtube.com/watch?v=4U-nxdp-LDw) 2016-04-25T14:32Z 196K followers, 38.2K engagements "#22: Spectrum Analyzer Basics / Tutorial and the Tektronix 1401A I picked up a Tek 1401A Spectrum Analyzer at a hamfest recently and it inspired me to do a video or two. This one presents a generic block diagram and tutorial of what a conventional swept spectrum analyzer is and how it works. It also shows a quick demo of the Tektronix 1401A Spectrum Analyzer Module from the mid-70's. Video Notes Page: http://www.qsl.net/w2aew/youtube/Basics_of_Spectrum_Analyzers.pdf" [YouTube Link](https://youtube.com/watch?v=4Y6ji0QBsww) 2011-10-23T15:54Z 218K followers, 98.3K engagements "#42: Composite Video on an Analog Oscilloscope using XYZ - Lab tour. One more video playing with the Z-axis input on an analog oscilloscope. This time I turn the scope into a composite video monitor by creating X and Y sawtooth ramp signals from the vertical and horizontal sync pulses. For this hack I use an LM1881 Composite Video Sync separator to easily extract the sync pulses from the composite video then a couple of transistors to create the sawtooth waveforms and finally a simply inverting amplifier to invert the video signal so that the resulting image on the scope is not a negative" [YouTube Link](https://youtube.com/watch?v=5FYF5uhCzAM) 2012-05-03T04:02Z 210K followers, 100K engagements "#164: More XY Oscilloscope graphics VintageTEK and how projects evolve It is sometimes very interesting how projects evolve - one leading to another and so on. This video presents a nice example of this and talks a little about a great organization - VintageTEK. Lots of links to follow. The first project in the series showed how to draw XY graphics on an oscilloscope using an Arduino: https://www.youtube.com/watchv=Dx9N91FnPdo That lead to building an R2R ladder DAC to make the graphic drawing repeat much faster (eliminating flicker): https://www.youtube.com/watchv=AulX1OM7RwE These migrated" [YouTube Link](https://youtube.com/watch?v=6CbxrLMKdS4) 2023-10-21T11:01Z 199K followers, 13.5K engagements "#300: Ham Basics: Sending Morse Code / CW - straight key paddles and iambic keying This video talks about the basic timing of CW / Morse code elements (dits and dahs) and how to send them using a few device - such as a traditional straight key as well as using a dual-lever paddle with an electronic keyer. Iambic keying with a paddles is also described and demonstrated. Notes from the video: http://www.qsl.net/w2aew/youtube/Morse_Code_Timing.pdf" [YouTube Link](https://youtube.com/watch?v=78VXLVZckIQ) 2019-05-04T23:20Z 218K followers, 466.8K engagements "#200: T/R Switch w/ PIN Diodes and Lumped Element Quarter-wavelength transmission line This video describes and demonstrates a simple single-band low-power electronic transmit / receive switch using PIN diodes an a quarter-wavelength RF transmission line. A lumped element equivalent of the 1/4 wavelength line is discussed and built into a PIN diode based T/R switch and the operation is demonstrated on the oscilloscope. This video builds upon a few prior videos listed here: #118: Basics of PIN Diodes: https://www.youtube.com/watchv=XpYsCM_Wf50 #82: Using Diodes as Switches:" [YouTube Link](https://youtube.com/watch?v=A1BAq0KxIdc) 2015-04-19T00:54Z 210K followers, 32.2K engagements "#91: Basic RF Attenuators - Design Construction Testing - PI and T style - A Tutorial This video describes the design construction and testing of a basic RF attenuator. The popular PI and T style attenuators are discussed. An example of a 20dB or 10X PI attenuator is designed and constructed and then tested using a spectrum analyzer with tracking generator. The construction technique shown minimized parasitic inductance of the components thus increasing the usable bandwidth of the attenuator. A copy of the notes in the video can be found here:" [YouTube Link](https://youtube.com/watch?v=A5gGeV7CiQ0) 2013-05-12T04:24Z 216K followers, 173K engagements "#76: Debug Transient EMI signal with a Mixed Domain Oscilloscope MDO4000 Tektronix This is a re-do of a video I did over a year ago using a fixed camera position and adding a few more details (no shaky-cam). It shows the use of a Tektronix MDO4000 series Mixed Domain Oscilloscope to track down the source of a transient RF / EMI signal through the use of RF triggering and multiple time-correlated traces to characterize the repetitive nature of the transient signal and identify a potential cause for this transient emission" [YouTube Link](https://youtube.com/watch?v=AhXEI3ihEFI) 2013-01-31T20:24Z 220K followers, 14.8K engagements "#362: Ham Radio: My Elecraft KX2 portable QRP shack kit for Parks On The Air (POTA) SOTA and more This video shows my Elecraft KX2 "shack in a pack" kit for QRP portable operations such as Parks On The Air (POTA) Summits On The Air (SOTA) and other portable operating activities. Some of the items included in this kit are: The Elecraft KX2: https://elecraft.com/products/kx2-ssb-cw-data-80-10-m-transceiver The Spark Plug Gear 49:1 UNUN Transformer: https://www.sparkpluggear.com/shop/p/sparkplug The BaMaKeY TP-III Paddles:" [YouTube Link](https://youtube.com/watch?v=CMRpv_CN3to) 2022-11-20T17:11Z 226K followers, 11.6K engagements "#23: Tektronix 1401A Spectrum Analyzer quick demo This short video shows a cool feature of the Tektronix 1401A Spectrum Analyzer Module that helped users find signal frequencies through a unique "marker" function. This function was the way to "mark" a particular frequency for further analysis or measurements before the advent of more fully integrated spectrum analyzers with multiple markers were developed" [YouTube Link](https://youtube.com/watch?v=D3O2xIL-91g) 2011-10-23T16:03Z 215K followers, 10.7K engagements "#381: Circuit Fun Followup: Trimming out distortion on Twin-Tee Oscillator - FFT &THD measurement This is a followup to the previous video on the Twin-Tee oscillator: https://youtu.be/KFVVozlXoOksi=WV0abgPCMmj5OQxJ .showing what happens in the FFT and the THD measurement as the trimmer is adjusted in the Twin-Tee network (by request). W2AEW Tek Tektronix twin-tee oscillator op amp distortion THD FFT tutorial W2AEW Tek Tektronix twin-tee oscillator op amp distortion THD FFT tutorial" [YouTube Link](https://youtube.com/watch?v=Dm1YjETg3rU) 2024-02-19T02:43Z 226K followers, 17K engagements "#202: Basics of using FFT on a Tektronix TDS2000 oscilloscope This video (by request) gives an overview of how to the FFT Math function on the Tektronix TDS2000 series oscilloscope. (same applies to the TDS1000). A brief review of FFT fundamentals is given followed by a demonstration of using the FFT function and controls ending with a description of the mathematical relationships between the scope settings and the FFT results. More modern scopes will have different (easier to use) controls for the FFT than this 12+ yr old scope but it is instructive to understand the operation of this" [YouTube Link](https://youtube.com/watch?v=EqRvUyPhbu8) 2015-05-23T01:57Z 216K followers, 61.2K engagements "#77: Op Amp Peak Detector Tutorial with peak detector basics This video introduces a simple peak detector circuit illustrates some of its limitations and then discusses how an op amp can improve on the circuit using negative feedback" [YouTube Link](https://youtube.com/watch?v=Fn5kHhNRsz0) 2013-02-02T05:07Z 215K followers, 76.9K engagements "#149: How to solder a leadless ceramic surface mount package LCC CLCC Just a short video to show how I hand solder a ceramic leadless chip carrier (CLCC) package to a circuit board in this case a Si570. Typical surface mount soldering techniques including the use of flux fine gauge solder and a fine tipped iron" [YouTube Link](https://youtube.com/watch?v=GJFd7-nzrH0) 2014-05-24T16:41Z 221K followers, 26.5K engagements "#260: RF Diode Mixer LO Drive Level & Conversion Loss 1dB Compression Distortion When selecting a diode mixer for RF applications one of the most important selection criteria is the Level of the mixer - which is the LO Drive level. This video describes the LO drive level and how it affects the commutation of the diodes and the mixer performance parameters such as Conversion Loss 1dB Compression level IP3 distortion etc. The mixer used in this video is a Mini-Circuits ADE-1ASK: https://www.minicircuits.com/pdfs/ADE-1ASK.pdf For more background on how diode ring mixers work see this video:" [YouTube Link](https://youtube.com/watch?v=GvadQpkZ8l0) 2017-05-26T23:52Z 215K followers, 32.5K engagements "#49: Simple Component Tester using Oscilloscope - Octopus Curve Tracer This video shows an example of performing a simple component test (curve tracer) on an oscilloscope. The simple circuit shown is often called an Octopus (I don't know why) and it's been around for decades in many variants. You can Google search on Octopus component tester oscilloscope curve tracer etc. and find dozens and dozens of variants. In the video I boil the circuit down to its simplest implementation describe how it works and demonstrate how you use it" [YouTube Link](https://youtube.com/watch?v=Gwo3pEH7hUE) 2012-06-09T04:34Z 216K followers, 383K engagements "#245: Old Tech: The Wadley Loop Superhet Receiver - Yaesu FRG-7 Example The Yaesu FRG-7 general coverage HF communications receiver utilized an interesting superheterodyne architecture called the Wadley Loop. It is a drift cancelling circuit that dramatically improves the frequency stability of the receiver by compensating for or more accurately cancelling out the drift of the 1st local oscillator (LO). This video takes a look at how the Wadley Loop works and shows some example signals from within the FRG-7 unit. Notes from this video: http://www.qsl.net/w2aew/youtube/WadleyLoop.pdf" [YouTube Link](https://youtube.com/watch?v=JvS9tBWAc1s) 2016-09-27T00:03Z 216K followers, 34.6K engagements "#75: Basics of Opamp circuits - a tutorial on how to understand most opamp circuits This tutorial discusses some general rules of thumb that make it easy to understand and analyze the operation of most opamp circuits. It presents some ideal properties of opamps and discusses how negative feedback generally causes the input voltage difference to be equal to zero (input voltages are made equal by the action of negative feedback). In other words the output will do whatever it can to make the input voltages equal. Applying this simple fact makes it easy to analyze most opamp circuits. A copy of" [YouTube Link](https://youtube.com/watch?v=K03Rom3Cs28) 2013-01-27T05:19Z 221K followers, 781.4K engagements "#345: Generating AM and DSB-SC with a Double-Balanced Diode Ring Mixer / Modulator This video answers the viewer question I received about how to generate AM (Amplitude Modulation) using a double-balanced diode ring mixer - in other words how to use it as an AM Modulator. The question arose from three other videos: Basics of Diode Ring Mixers: https://youtu.be/junuEwmQVQ8 Basics of the Gilbert Cell: https://youtu.be/7nmmb0pqTU0 Generating DSB-SC and AM with a Gilbert Cell: https://youtu.be/38OQub2Vi2Q Video Notes: http://www.qsl.net/w2aew/youtube/DSB-SC_AM_DBMixer.pdf" [YouTube Link](https://youtube.com/watch?v=KBq0sblnHWs) 2021-12-29T03:56Z 211K followers, 29.8K engagements "#380: Circuit Fun: Twin-Tee Oscillator - low distortion op amp sine waves This circuit fun video presents the Twin-Tee op amp oscillator - a fun circuit that can make low distortion (low THD) sine waves with simple resistors and capacitors no inductors. It is a circuit you don't see written up too much. Here is a link to the Texas Instruments article shown in the video: http://www.ti.com/lit/pdf/slyt164 More appnotes on sine wave oscillators. https://www.ti.com/lit/SLOA060 https://www.ti.com/lit/an/snoa665c/snoa665c.pdf My show notes: http://www.qsl.net/w2aew/youtube/twintee_oscillator.pdf" [YouTube Link](https://youtube.com/watch?v=KFVVozlXoOk) 2024-02-17T04:01Z 226K followers, 55.9K engagements "#391: POTA: First POTA activation with the CFT1 5-Band CW transceiver kit First Parks on the Air (POTA) activation using the new CFT1 5-band cw transceiver kit by KM4CFT. Band conditions were not great so it took about [--] minutes to get [--] contacts. You can get your own CFT1 here: https://hamgadgets.com/cft1-by-km4cft.html Build - Adjust - Align video here: https://youtu.be/vWbe1qQJ1Sk W2AEW Tek Tektronix POTA CW ham radio W2AEW Tek Tektronix POTA CW ham radio" [YouTube Link](https://youtube.com/watch?v=LDXjgZixEHg) 2024-09-17T01:30Z 226K followers, [----] engagements "#70: Digital Oscilloscope Bandwidth Measurement - direct and using risetime This is a followup video to my last one which discussed the basics of oscilloscope bandwidth. This video answers a viewer question about digital scope BW and usability above the rated bandwidth as well as making the 3dB bandwidth measurement two ways - directly and through a risetime measurement. In each case one has to be careful that the signal source is "known" to be flat over the frequency range of interest or that the risetime of the test signal is either known or significantly faster than the risetime of the" [YouTube Link](https://youtube.com/watch?v=Ly5pmYopEfU) 2012-12-16T22:42Z 218K followers, 35.9K engagements "#367: Characterizing the key-up frequency transient on an Alinco DR-135 Mk III 2m radio with an RSA A fellow ham reported some transient interference coming from a local digipeater that was using the Alinco DR-135 2m FM transceivers. He found that they had a significant frequency instability at key-up and asked me to verify and document this in a video. This video takes a look at two different DR-135 rigs. I also take a look at an older Kenwood TM-231A and an Icom rig for comparison. It is clear from this video that the Alincos definitely have a serious frequency instability upon key up of" [YouTube Link](https://youtube.com/watch?v=PRpkR9J2L5M) 2023-04-09T05:55Z 226K followers, 11.6K engagements "#308: Back to Basics: Diodes - guide to operation characteristics types and specifications This video is a Practical Guide to Diodes - their basic operation IV curves typical characteristics various diode types and common diode specifications. Links to many of my previous videos involving diodes are mentioned so these links are included below: Reverse Recovery Time: https://youtu.be/SBqLOrlA7QI Diodes as Switches: https://youtu.be/YBNIq_d56sA Zener Diode Basics: https://youtu.be/jfstUsnCmao Basics of PIN Diodes: https://youtu.be/XpYsCM_Wf50 PIN Diode T/R Switch: https://youtu.be/A1BAq0KxIdc" [YouTube Link](https://youtube.com/watch?v=Pp5AAj2aIzc) 2019-11-04T05:19Z 220K followers, 39.2K engagements "#204: Basics of Tunnel Diodes and their applications Tunnel diodes are a bit rare these days but still have uses in special applications including extremely high frequency oscillators etc. They were commonly used in microwave circuits oscilloscope trigger circuits and other applications. This video reviews the basics of tunnel diodes including the basic properties and simple applications. I refer to these as the "bucking bronco" of diodes because of the IV curve that jumps around and the fact that these diode will jump into wild oscillation if you just look at them funny There is a lot of" [YouTube Link](https://youtube.com/watch?v=PuG8CCUbg58) 2015-06-23T15:20Z 220K followers, 104.3K engagements "#262: IQ Modulator Basics: Operation measurements impairments This video discusses the basics of an IQ modulator discusses and demonstrates its operation shows a few typical modulation types as well as the effects of various impairments. It also shows the basic SSB Suppression test. I use a combination of a few Mini-Circuits mixers (ADE-1ASK) for much of the video and also show one of their IQ Modulator modules (ZFMIQ-10M). As mentioned in the video there are a few pre-requisite videos that are recommended to watch prior to this video: Basics of IQ Signals:" [YouTube Link](https://youtube.com/watch?v=RHFZUqUM8DY) 2017-06-22T21:46Z 221K followers, 99.8K engagements "#201: Basics of Reverse Recovery Time in a Diode This video covers the basics of what the reverse recovery period is in a diode some of the parameters that affect the reverse recovery time and a simple measurement setup to observe the reverse recovery characteristic. Other related videos are: A PIN Diode based T/R switch: https://www.youtube.com/watchv=A1BAq0KxIdc Basics of PIN Diodes and RF switching: https://www.youtube.com/watchv=XpYsCM_Wf50 Basics of using diodes as switches: https://www.youtube.com/watchv=YBNIq_d56sA Notes page: http://www.qsl.net/w2aew/youtube/reverserecovery.pdf" [YouTube Link](https://youtube.com/watch?v=SBqLOrlA7QI) 2015-05-02T02:26Z 220K followers, 65.8K engagements "#215: Basics of crossover distortion LM358 op amp example This video discusses the basics of crossover distortion. It discusses one very common cause for crossover distortion using the LM358 op amp as an example. The circuit schematic of the LM358 is examined to determine the cause of the distortion and then a simple method for eliminating the distortion is demonstrated. Show notes can be found here: http://www.qsl.net/w2aew/youtube/crossoverdistortion.pdf LM358 Datasheet: http://www.ti.com/lit/ds/symlink/lm158-n.pdf" [YouTube Link](https://youtube.com/watch?v=VgodYtiD_F0) 2015-10-03T03:49Z 217K followers, 48.5K engagements "#125: Tektronix MDO4000B Enhancements - RF specs Signal Analysis and WLAN WiFi Example This video presents the performance and feature enhancements included in the "B" version of the Tektronix MDO4000B series Mixed Domain Oscilloscope. For an introduction to the MDO please see this video: http://www.youtube.com/watchv=x1oe45DP1_4 The B version includes performance enhancements on the Spectrum Analyzer as well as a live-link to a comprehensive vector signal analysis software package called SignalVu-PC. This is the same analysis that is native to the Tektronix RSA Realtime Spectrum/Signal" [YouTube Link](https://youtube.com/watch?v=WBDS9ebDLhg) 2014-01-11T03:31Z 218K followers, 16.7K engagements "#399: Review: 3D-printed Straight-key with a great story - by the HamRadioDuo This 3D printed straight-key by Mike (N4FFF) and Becky (N4BKY) inspired by the J-38 has a great story and mission behind it - take a look at the video. For more information see the links below: Where to get the key: https://shop.hamradioduo.com/ HamRadioDuo Youtube channel: https://www.youtube.com/@HamRadioDuo Their tools page on website: https://www.hamradioduo.com/tools/ The main HamRadioDuo webpage: https://www.hamradioduo.com W2AEW Tek Tektronix ham radio morse code straight key W2AEW Tek Tektronix ham radio" [YouTube Link](https://youtube.com/watch?v=_uSyl1tj4J4) 2025-06-13T13:40Z 226K followers, [----] engagements "#290: Vintage Tech: Tektronix [---] Curve Tracer This video presents the basics of what a curve tracer is then takes a brief look at the venerable Tektronix [---] Curve Tracer - inside and out. We then finish up by tracing some curves for a diode BJT JFET and a "mystery" device. Notes: http://www.dorkage.com/youtube/Curve_Tracer.pdf Some earlier videos on curve tracing: Octopus: https://www.youtube.com/watchv=Gwo3pEH7hUE Basic curve tracer with function generator and scope: https://www.youtube.com/watchv=WWY-pakm_OM Three terminal curve tracer based on a step generator circuit:" [YouTube Link](https://youtube.com/watch?v=c-y8UmoHbtw) 2018-08-22T02:29Z 216K followers, 32.1K engagements "#368: Overview of the Peak Atlas DCA Pro Model DCA75 Semiconductor Component Analyzer & Curve Tracer This is a brief overview of the Peak Atlas DCA Pro semiconductor component analyzer the model DCA75 from Peak Electronics. Some brief comparisons to the inexpensive multi-function testers available today as well as a large full-blown curve tracer as we take a look at the basic and advanced features of this great little tester. The unit shown in this video is an older version of this: https://www.peakelec.co.uk/acatalog/dca75-dca-pro-semiconductor-analyser.html Amazon link:" [YouTube Link](https://youtube.com/watch?v=cWqeyn17Vac) 2023-05-18T15:47Z 226K followers, 38.2K engagements "#274: Smith Chart Basics: Impedance and Admittance curves and conversion This introductory video describes how complex impedance and admittance are represented on the Smith Chart and how to convert between them. A VNA is used to illustrate the complex impedance representation on a live smith chart with variable resistive and reactive components. Notes can be found here: http://www.qsl.net/w2aew/youtube/Smith_Chart_Basics-Impedance_and_Admittance.pdf Check out my friend Mike's awesome iPhone/iPad app that automates these Smith Chart and Impedance conversions and the associated introductory" [YouTube Link](https://youtube.com/watch?v=gw1TYWwfvGk) 2017-12-31T04:41Z 216K followers, 85.8K engagements "#371: Ham Radio Quick Tip: Tuning aid for Adjustable Coil vertical like the MP1 and others Here's a quick tip showing a homemade adjustment gauge for an adjustable coil vertical like the SuperAntenna MP1 shown which is one of the antennas I carry for POTA activations. The same type of gauge can be made for antennas such as the Wolf River Coil and others. Of course this assumes that you've already measured and documented the coil tap positions for the bands you choose to operate on. The coil shown in the video is part of this antenna: http://newsuperantenna.com/Super-Antenna-MP1/ W2AEW Tek" [YouTube Link](https://youtube.com/watch?v=hOYbrh44bxQ) 2023-07-24T20:56Z 226K followers, [----] engagements "#55: Back to Basics: Tutorial on LC Resonant Circuits This video builds upon the voltage / current phase relationships that were demonstrated in the previous video: http://www.youtube.com/watchv=ykgmKOVkyW0 to show how these lead/lag relationships give rise to the unique properties of series and parallel resonant LC circuits. The voltage and current waveform phases are examined and it is shown how these waveforms combine at resonance. The result of this paper analysis is also shown live on the oscilloscope. These simple circuits can be used to create frequency selective networks which are" [YouTube Link](https://youtube.com/watch?v=hqhV50852jA) 2012-07-24T03:11Z 221K followers, 209.4K engagements "#145: Unboxing the Tektronix MDO3000 Oscilloscope A short video sharing the excitement of unboxing a new Tektronix MDO3000 Mixed Domain Oscilloscope" [YouTube Link](https://youtube.com/watch?v=iR7QTHe2i1k) 2014-05-08T03:35Z 218K followers, 17K engagements "#147: Basics of Varactor Diodes Voltage Controlled Oscillator VCO Example This tutorial presents the basics of the varactor diode or varicap diode and describes how it functions as a voltage controlled capacitor. A test fixture is shown and used to measure the capacitance vs. reverse voltage. Finally a voltage-controlled oscillator circuit is built and measured showing how the voltage on the varactor diode is used to tune the frequency of the VCO. Notes from the video are here: http://www.qsl.net/w/w2aew//youtube/Varactor_diodes_with_VCO_example.pdf" [YouTube Link](https://youtube.com/watch?v=icw8terKP-M) 2014-05-11T11:59Z 216K followers, 68.8K engagements "#138: How to Measure Output Impedance This video shows a few methods for measuring the output impedance or resistance of a function generator amplifier or other circuits. These methods generally apply to relatively low frequency use cases and won't necessarily apply to all circuit types. The methods shown are all variations on measuring the response of the circuit to different load impedances and calculating the device or circuit's output impedance from those readings. A low frequency sinusoid (sinewave) is used as a test signal to prevent problems from reflections on misterminated" [YouTube Link](https://youtube.com/watch?v=ieAhBejHe2M) 2014-04-06T18:58Z 220K followers, 245.7K engagements "#395: Easy to make ground-radial kit for portable radio operations using ribbon cable This video shows the ground radial (counterpoise) kit that I make from ribbon cable for my portable vertical antenna deployments during Parks on the Air (POTA) and other temporary/portable radio operations. W2AEW Tek Tektronix POTA ground radial antenna vertical antenna magic carpet counterpoise W2AEW Tek Tektronix POTA ground radial antenna vertical antenna magic carpet counterpoise" [YouTube Link](https://youtube.com/watch?v=lEHup1Husrc) 2024-12-30T04:13Z 226K followers, 17.1K engagements "#341: Ham tip: Safely using a coax switch to connect multiple rigs to a single antenna system This video answers the question - "Can an antenna switch be used in reverse to switch multiple radios into a single antenna system and is it safe" The answer is - YES in most cases - as long as the switch grounds the unused inputs which is usually the case. The video takes a look at the numbers describes how much isolation is needed and then shows how to measure the isolation using a NanoVNA and finally shows the results using a couple of HF radios. Notes from this video are here:" [YouTube Link](https://youtube.com/watch?v=lMMql1gEORQ) 2021-10-31T01:43Z 210K followers, 56K engagements "#121: Basics of SCRs and some circuit fun - device and circuit tutorial The basics of Silicon Controlled Rectifiers (SCRs) is presented. The inspiration was a circuit query on the EEVBlog Forum: http://www.eevblog.com/forum/beginners/simple-exponential-decay-generator/ SCRs are part of a class of semiconductors called Thyristors - a group which consists of devices like SCRs TRIAC DIACs etc. They're typically used in power control applications but can be used for other purposes too. This video presents the basic operation of an SCR and a simple little circuit that exploits its properties. A" [YouTube Link](https://youtube.com/watch?v=lSqCiCc7jQc) 2013-12-15T04:07Z 222K followers, 43.3K engagements "#233: Back to Basics: How to use the [--] terminals of a lab power supply split supply A short "back to basics" video on why there are three terminals on a lab power supply (+ - and GND) and the various ways they can be connected. I often get asked about how to setup a split supply for an op amp circuit - so that was the reason for putting this short video together" [YouTube Link](https://youtube.com/watch?v=mJL11UF1arQ) 2016-03-08T03:44Z 216K followers, 63.6K engagements "#263: Using a VNA to sweep an RF Dummy Load Tektronix TTR506A Vector Network Analyzer This short video shows how to use a Vector Network Analyzer (VNA) to sweep a dummy load to determine its usable frequency range. In this case I test a Bird Termaline and an inexpensive ParaDynamics load. Setup calibration and test are shown. The Return Loss S11 and the SWR are shown. The analyzer used is the Tektronix TTR506A: http://www.tek.com/vna/ttr500" [YouTube Link](https://youtube.com/watch?v=mdDUhTB6aPE) 2017-07-11T21:46Z 216K followers, 24.7K engagements "#242: How to use an oscilloscope. Plus seeing signals in antique radios NJARC This is a recording of a presentation I gave to the NJ Antique Radio Club on [--] July [----] at Bowen Hall Princeton University. It covers the basic controls and operation of an analog oscilloscope (the first [--] minutes or so) and then how you would setup the scope to measuring the signals in various locations in a typical antique AM radio (staring about [--] minutes in). We used a "trainer" radio which is a classic All American Five type design but spread out on a large board making it easy to see the components and" [YouTube Link](https://youtube.com/watch?v=niBGkqlh2XY) 2016-07-09T15:36Z 212K followers, 120.4K engagements "#14: Tektronix MDO4000 Spectrum Analyzer quick comparison to entry level analyzer This video takes a very brief look at the basic noise floor and sweep speed performance of the spectrum analyzer portion of the new Tektronix MDO4000 Mixed Domain Oscilloscope to a basic entry level swept spectrum analyzer. Both analyzers are set to the same set of settings and the sweep speed / spectrum update rate are compared. The integrated spectrum analyzer in the MDO is intended to be comparable to the performance of conventional entry level class spectrum analyzers similar to the Agilent ESA-L E4411B that" [YouTube Link](https://youtube.com/watch?v=nyl1cnvUWQs) 2011-09-06T01:07Z 220K followers, [----] engagements "#131: How to test transistors - NPN and PNP bipolar junction transistors BJTs A back to basics video showing several ways to test BJTs or bipolar junction transistors. The example shown is an NPN transistor. To test a PNP transistor simply reverse the leads of the meter. The use of an analog meter / VOM (Simpson 260) as well as a Fluke digital multimeter DMM is shown as well as a couple of Heathkit transistor checker/testers" [YouTube Link](https://youtube.com/watch?v=qM7_h8my8eA) 2014-02-22T04:45Z 210K followers, 144.8K engagements "#388: Build tune and test a trapped 20/30/40m End Fed Half Wave antenna This "part 2" video summarizes the build tune and test of a trapped EFHW antenna for the [--] [--] and 40m amateur radio bands. My previous video: https://youtu.be/KIEZmwB8AHwsi=yKC6pJmZ0JXx9kQe .shows the process of building and tuning the low power / QRP traps that I purchased in kit form from N7KOM. See additional links in the previous video for details. My resulting wire lengths were: UNUN to 20m trap: 30'-2.5" (about 9.21m) 20m to 30m trap: 4'-7.5" (about 1.41m) 30m trap to end: 8'-6" (about 2.59m) W2AEW Tek Tektronix" [YouTube Link](https://youtube.com/watch?v=qNqLWab7GaY) 2024-07-06T21:01Z 226K followers, 15.7K engagements "#305: Measuring Total Harmonic Distortion THD using an FFT on an oscilloscope This video shows how to use the FFT function on an oscilloscope to measure the relative amplitude of the harmonic distortion components of a signal and then take those results and compute the THD or Total Harmonic Distortion. Actual measurements are shown and results are validated by a THD calculator in the scope as well as a THD measuring multimeter. Videos mentioned in this video are: Audio Compressor project: https://youtu.be/1h0FZJYXQ_w Demo of above: https://youtu.be/pUii_pDQxg8 Basics of using FFT:" [YouTube Link](https://youtube.com/watch?v=s_cVP5gu4SY) 2019-10-02T00:38Z 220K followers, 105.5K engagements "#94: RMS Voltage for Sine and square waves and why your DMM might not work right This video discusses the meaning of RMS voltage and runs through an example of sine waves illustrating the [-----] "factor". Examples of AC square waves and digital PWM waves are also shown along with cautions regarding the results obtained with DMMs including True-RMS DMMs which may not read the RMS values of digital waveforms correctly. Notes from the video can be found here: http://www.qsl.net/w/w2aew//youtube/RMS_voltage_DMM_measurements.pdf" [YouTube Link](https://youtube.com/watch?v=ue0wtlrmCJE) 2013-05-27T03:28Z 221K followers, 65.3K engagements "#389 Kit Build: CFT1 5-band CW Field Transceiver - build / adjust / align / test THIS VIDEO HAS AN ERROR IN THE RF POWER ADJUSTMENT SECTION. PLEASE WATCH THE FOLLOWING VIDEO INSTEAD: https://www.youtube.com/watchv=yWVh9Ojz-ak This video shows the process of building and adjusting/aligning the CFT1 5-band CW portable transceiver. (NOTE: At 37:24 I incorrectly show adjusting RV2 it should be RV1 that you adjust for the PA RF Power). It includes tips on assembly and soldering as well as details on winding toroids (optional pre-wound available) and the final adjustment/alignment process. Here are" [YouTube Link](https://youtube.com/watch?v=vWbe1qQJ1Sk) 2024-09-15T19:55Z 210K followers, [----] engagements "#56: Basics of Capacitor & Inductor self-resonance parasitics etc. - Tutorial This video builds upon the last two videos: Current and Voltage in Ls and Cs: http://www.youtube.com/watchv=ykgmKOVkyW0 LC Resonant Circuits: http://www.youtube.com/watchv=hqhV50852jA that discussed the voltage and current properties of capacitors and inductors then discussed the concept of resonance. This video looks at some of the practical aspects of component selection by discussing the various parasitic properties of real-world (non-ideal) components and how these properties can dramatically alter the device" [YouTube Link](https://youtube.com/watch?v=vi24SpKYYoQ) 2012-07-29T21:08Z 216K followers, 115.9K engagements "#20: Quick [--] minute Tektronix Mixed Domain Oscilloscope MDO4000 Demo This video is a very quick 5min demonstration of the new Tektronix MDO4000 - a Mixed Domain Oscilloscope. Its the first scope of its kind that adds a time-correlated Spectrum Analyzer to a Mixed Signal Oscilloscope thereby giving you one instrument that includes [--] analog scope inputs [--] digital inputs and one dedicated RF input. The Spectrum Analyzer is very nice large screen basic spectrum analyzer which includes some very "non-basic" features. These include a Spectrogram display (to show spectral history of the" [YouTube Link](https://youtube.com/watch?v=x1oe45DP1_4) 2011-09-27T02:46Z 218K followers, [----] engagements "#365: Ham Radio: What is your CW straight key sending style This video poses the question - how do you operate your straight key when sending Morse Code (CW) There are a LOT of ways to do this. I show a few common techniques but there certainly are more variations. What do you do More about Straight Key Night: http://www.arrl.org/straight-key-night My video on the Basics of Morse Code: https://youtu.be/78VXLVZckIQ W2AEW Tek Tektronix Morse Code CW ham radio telegraphy W2AEW Tek Tektronix Morse Code CW ham radio telegraphy" [YouTube Link](https://youtube.com/watch?v=yXIFxmplmIQ) 2022-12-31T21:12Z 226K followers, 21.6K engagements "#142: Basics of High Voltage Probes and how to use them The basics of old-school high voltage probes that are used with multimeters VTVMs and DMMs. The basic theory of operation construction and use of these probes is presented. Some cautions about some unexpected behavior of modern DMMs is also presented. PLEASE NOTE: HIGH VOLTAGE CAN BE VERY DANGEROUS - DO NOT ATTEMPT TO MAKE ANY HIGH VOLTAGE MEASUREMENTS IF YOU DO NOT KNOW WHAT YOU ARE DOING. THIS VIDEO DOES *NOT* PRESENT ALL OF THE NECESSARY PRECAUTIONS THAT NEED TO BE TAKEN WHEN MEASURING HIGH VOLTAGE" [YouTube Link](https://youtube.com/watch?v=-_LJXKLgIYc) 2014-04-24T21:55Z 225K followers, 94.3K engagements "#135: Measure Capacitor ESR with an Oscilloscope and Function Generator This video discusses how to measure the ESR (equivalent series resistance) of a capacitor using an oscilloscope and function generator. All of the capacitors tested in this video were 220uF electrolytic caps. In reality the resistance in the plates of a dried out electrolytic capacitor can't be modeled as a simple series resistor but for the purposes of identifying good from bad this simplification works fine. In the video I show the ESR meter that I made in [----]. The video for that is here:" [YouTube Link](https://youtube.com/watch?v=115erzCCxgE) 2014-03-22T04:42Z 224K followers, 315.5K engagements "#221: The Bird [--] Directional Wattmeter: Overview and how-to use An introduction overview and how-to-use tutorial of the venerable Bird Model [--] Thruline directional RF wattmeter / power meter. The Bird [--] was introduced in [----] and is still being produced/sold today largely unchanged from its original design. These meters are basically the standard of the industry much like Fluke is for DMMs. I review the various aspect and elements of the meter what the slugs do and how to use the meter. While this meter does not measure VSWR (voltage standing wave ratio) you can determine SWR from the" [YouTube Link](https://youtube.com/watch?v=149AuSmk4M8) 2015-12-11T04:33Z 223K followers, 107.9K engagements "#359: Quick Tip: Selecting 10x passive probes for your oscilloscope - Bandwidth and Compensation. This video answers the most common questions I get about oscilloscopes and probes. What BW probe should I get Can I use a probe with a BW that is different than my scope BW etc. One important consideration presented in the video is ensuring that the probe can be properly compensated. Here are videos that I have done in the past on probe compensation: https://youtu.be/oxJQr4dKnys https://youtu.be/SX4HGNWBe5M" [YouTube Link](https://youtube.com/watch?v=2qLd_Y2EpNs) 2022-07-24T22:50Z 223K followers, 16.7K engagements "#372: How to install an N-connector crimp-on type to LMR-600 RG-217 or similar coax cable This video shows how to install a crimp-on style N-male connector onto coaxial cable - specifically LMR-600 RG-217/U or other 0.59" cable types. Other coax styles will be similar but may have different strip dimensions. Always consult the installation guide. The connector shown is from Max-Gain Systems: http://www.mgs4u.com W2AEW Tek Tektronix ham radio coax how-to tutorial n-connector crimp on install W2AEW Tek Tektronix ham radio coax how-to tutorial n-connector crimp on install" [YouTube Link](https://youtube.com/watch?v=31mEyuqM01U) 2023-09-05T20:51Z 226K followers, 49K engagements "#346: Basics of Capacitor Leakage / using the Antique Wireless Association DC Leakage Tester This video discusses the basics of capacitor leakage and how to test for it - focusing on the DC Leakage Tester available as a circuit board from the Antique Wireless Association. Here are the links for this video: Antique Wireless Association DC Leakage Tester PCB: https://www.antiquewireless.org/homepage/pcb-item-4/ Some good info on old electrolytic capacitors: http://conradhoffman.com/capchecktut.htm RadioWild's Youtube Channel: https://www.youtube.com/radiowild Notes from this video:" [YouTube Link](https://youtube.com/watch?v=3o9FncDRPPg) 2022-01-24T04:27Z 225K followers, 47.9K engagements "#287: How to use the Delayed B-Sweep Timebase on Tektronix [----] [----] [----] [----] Oscilloscopes This short video shows how to use the B timebase also known as the Delayed Timebase on the Tektronix [----] [----] [----] and [----] series of oscilloscopes. Most of the basic functionality and controls are demonstrated. These features are what we used to zoom into certain areas of a waveform in the days before we had digital oscilloscopes" [YouTube Link](https://youtube.com/watch?v=54roz8IUoVI) 2018-07-20T04:30Z 224K followers, 33.6K engagements "#171: IQ Signals Part II: AM and FM phasor diagrams SSB phasing method This is a followup video to the IQ Basics: https://www.youtube.com/watchv=h_7d-m1ehoY .showing the resulting phasor diagrams of the IQ signals for a few different RF signal types. AM frequency offset and FM are shown and the use of quadrature techniques for SSB generations through the Phasing Method is discussed. Notes from this video can be found here: http://www.qsl.net/w/w2aew//youtube/IQ_Signals_AM_FM_SSB_phasing.pdf" [YouTube Link](https://youtube.com/watch?v=5GGD99Qi1PA) 2014-09-08T13:42Z 225K followers, 135.9K engagements "#337: Use a NanoVNA to measure input impedance and gain of a small-signal RF amplifier This video shows how to measure the input impedance and gain of a small-signal RF amplifier - including the use of an attenuator to keep the amp in it's linear range and also to not overdrive the NanoVNA. This stems from a recent conversation with Bill N0CQR (SolderSmoke podcast). The amplifier featured is a "Termination Insensitive Amplifier" or TIA that is described in paper by Wes Hayward (W7ZOI) and Bob Kopski (K3NHI) - see links below: Soldersmoke blog: http://soldersmoke.blogspot.com/ Wes's webpage:" [YouTube Link](https://youtube.com/watch?v=7TtKE39TWpI) 2021-07-18T18:04Z 225K followers, 97.5K engagements "#223: Basics of the Gilbert Cell Analog Multiplier Mixer Modulator A short tutorial on the basics of the Gilbert Cell - a very popular analog four-quadrant multiplier circuit that has a wide variety of applications ranging from variable gain amplifiers to mixers and balanced modulators. The video is light on the math focusing mainly on delivering a practical intuitive understanding of how the circuit operates. It is highly recommended that the viewer be familiar with the basic operation of a differential-pair. Video #193 (linked below) would be a good thing to review to freshen up on the" [YouTube Link](https://youtube.com/watch?v=7nmmb0pqTU0) 2015-12-21T16:16Z 224K followers, 114.5K engagements "#101: How to measure FM Frequency Deviation without special equipment using Carrier / Bessel Null **More details here please read** This video shows how to measure FM Frequency Deviation using the Carrier or Bessel Null method. Ideally no special equipment is needed besides a CW receiver capable of tuning to the FM transmit frequency an audio generator a method of properly adjusting the the audio into the transmitter and a safe way of coupling the TX output into the receiver. This method takes advantage of the fact that the carrier of an FM signal modulated with a single audio tone will pass" [YouTube Link](https://youtube.com/watch?v=8IBOYoIV5m8) 2013-07-18T03:25Z 224K followers, 42.2K engagements "#404: The VFET is a JFET that thinks it is a Triode vacuum tube - aka Static Induction Transistor This video is a quick introduction to the Static Induction Transistor also known as a Vertical FET or VFET. This device is a JFET that behaves like a vacuum tube Triode. You may want to refresh yourself on what a Junction Field Effect Transistor (JFET) is and it's characteristics by reviewing this video: https://youtu.be/oambDFa0Pr8 Here is a really nice writeup on these devices from an audio applications perspective: https://fromvinyltoplastic.com/what-are-static-induction-transistors-sit/ The" [YouTube Link](https://youtube.com/watch?v=93ke5wM0gZ0) 2025-10-24T01:56Z 226K followers, 17.7K engagements "#299: How to build an Open - Short - Load (OSL) Calibration kit for HF Antenna Analyzer In video #280 I did a complete review of the RigExpert AA-55 ZOOM Antenna Analyzer and showed how to use an open-short-load (OSL) calibration kit to calibrate the analyzer to the end of a transmission line. In other words to remove the transmission line from the measurements. This video shows how to build your own OSL cal kit that is suitable for HF use (to basically the frequency limits of the SO-239 / PL-259 connectors). The SO-239 to SMA-female adapters used in this video are:" [YouTube Link](https://youtube.com/watch?v=9QRpWjLFApA) 2019-04-07T21:21Z 223K followers, 42.8K engagements "#88: Cheap and simple TDR using an oscilloscope and 74AC14 Schmitt Trigger Inverter This video is a follow on from my previous video that discussed how to measure the length and impedance of coax using an oscilloscope and an pulse generator. This previous video goes into more of the theory and the different measurements you can make. It can be found here: http://youtu.be/Il_eju4D_TM However this video showed the use of a pulse or function generator as the signal source. The problem is that most inexpensive generators won't have a fast enough risetime to be able to resolve shorter cables or" [YouTube Link](https://youtube.com/watch?v=9cP6w2odGUc) 2013-04-21T20:05Z 226K followers, 197.9K engagements "#394: Oscilloscope Best Practices - some of the most common issues and tips This video is a brief reminder of some of the most common considerations to optimize your measurements and signal / waveform fidelity with your oscilloscope. Each of the "tips" is briefly discussed. I have videos on many of these tips individually linked here: 10X probe tutorial: https://youtu.be/SX4HGNWBe5M Capacitive Loading of Probes: https://youtu.be/sPSJnj7gVJA 10X Probe Selection: https://youtu.be/2qLd_Y2EpNs Importance of Probe Compensation: https://youtu.be/oxJQr4dKnys Probe Ground Lead Length:" [YouTube Link](https://youtube.com/watch?v=AJYpiPGySEs) 2024-12-16T01:31Z 226K followers, 39K engagements "#393: Analysis of the RF characteristics of the Baofeng UV-5R Dual Band HT This video takes a quick look at the RF transmitter performance of the Baofeng UV-5R Dual Band transceiver. It takes a look at the RF harmonic emissions the transient key-up characteristics the CTCSS performance and a look at some unusual higher frequency FM content. W2AEW Tek Tektronix amateur radio HT Baofeng UV-5R harmonics PL tone CTCSS transceiver measurements W2AEW Tek Tektronix amateur radio HT Baofeng UV-5R harmonics PL tone CTCSS transceiver measurements" [YouTube Link](https://youtube.com/watch?v=CUSUEr6YGOw) 2024-10-10T01:57Z 226K followers, 18.4K engagements "#51: Basic Spectrum Analyzer Do's and Dont's . .or how NOT to blow up your Spectrum Analyzer This video covers the very basics of how to safely use your spectrum analyzer without damaging it and how to setup the basic controls to get usable results. It is not intended to be a full tutorial on how to use a Spectrum Analyzer just enough to allow you to use with without damaging it and how the "Auto" coupled settings for things like the vertical Attenuator the RBW and Sweep operate" [YouTube Link](https://youtube.com/watch?v=E6P-R0C9ro0) 2012-06-19T20:40Z 223K followers, 275.7K engagements "#315: How to use the NanoVNA to measure a low-pass filter This video shows step-by-step how to use the NanoVNA to measure a simple lowpass filter. The filter used in the video was originally featured in the Michigan Mighty Mite video (#228): https://www.youtube.com/watchv=2AdW9Zpl2Es The video walks through trace selection and configuration sweep setup calibration and measurement. Please note that when running the calibration the OPEN SHORT and LOAD are connected to CH0 (not CH1). Please see my previous videos on VNA calibration VNA basics and other topics including Smith Charts to learn" [YouTube Link](https://youtube.com/watch?v=F17mN5uuzGY) 2020-06-23T19:34Z 224K followers, 106.2K engagements "#402: Overview of the Sysjoint SV4401A Vector Network Analyzer from Chelegance This video provides an overview / introduction to the Sysjoint SV4401A 4.4GHz VNA offered by Chelegance. It provides an overview of the features and simple menu structure of the unit. More info specifications documentation and distributors can be found on the Chelegance site linked below: https://chelegance.com/products/sv4401a-4-4g-vna-with-7-capacitive-touchscreen/ w2aew tek Tektronix vna nanovna network analyzer vector network analyzer ss4401a sysjoint chelegance introduction w2aew tek Tektronix vna nanovna" [YouTube Link](https://youtube.com/watch?v=FRHU7EgSwgU) 2025-08-23T04:43Z 226K followers, 14.6K engagements "#318: NanoVNA comparison measuring a duplexer - NanoVNA-H4 and SAA-2N Is the NanoVNA suitable to measure/adjust a typical antenna duplexer This video compares the NanoVNA-H4 and the SAA-2N VNAs with a professional VNA (Tektronix TTR506A). Will the limited dynamic range of the NanoVNA get in the way of making a good measurement or limit the ability to adjust the duplexer Watch and find out" [YouTube Link](https://youtube.com/watch?v=GipCVEsiqXc) 2020-10-03T03:25Z 224K followers, 81.2K engagements "#397: How to use cursors on Tektronix [----] series scopes including some "secret" features This video shows how to use the cursors on the Tektronix [----] series oscilloscopes such as the [----] [----] and [----]. Basic cursor functions for measuring voltage time and frequency are covered as well as the lesser known features to measure amplitude ratios duty cycle and phase. W2AEW Tek Tektronix oscilloscope scope tutorial how to cursors voltage time frequency ratio phase W2AEW Tek Tektronix oscilloscope scope tutorial how to cursors voltage time frequency ratio phase" [YouTube Link](https://youtube.com/watch?v=Gq1gNX2su2Q) 2025-03-08T22:53Z 226K followers, 10.5K engagements "#10: AC / DC Coupling on an Oscilloscope This video discusses the AC and DC vertical coupling modes on an oscilloscope. It shows that these settings are not really the same thing as the AC/DC settings on a multimeter but rather they dictate how the signal is coupled to the vertical channel of the scope. In many cases the DC coupling mode is very useful for looking at AC signals. Similiarly the AC coupling mode can be very useful when looking at DC signals. The choice of which vertical coupling mode to use depends upon the signals and circuits that you are looking at" [YouTube Link](https://youtube.com/watch?v=Hkq-fvb5-NI) 2011-06-28T01:50Z 225K followers, 122K engagements "#188: Mini review / demo: GP-5/SSB Shortwave AM/FM and SSB portable receiver This is a brief review and demonstration of the CountyComm GP-5/SSB portable receiver that operates on AM FM Shortwave and shortwave single-sideband. It is manufactured by Tecsun but not offered under that brand (at the time of video production). It is the same form factor as the Tecsum PL-360 so I wouldn't be surprised if Tecsun offers a version of this radio in the future. Overall a very nice little ultra-portable receiver that includes USB and LSB reception on shortwave - very unusual to find in a receiver of this" [YouTube Link](https://youtube.com/watch?v=JuEPJ3qGu_g) 2014-12-30T21:04Z 223K followers, 56.3K engagements "#384: What is the bandwidth of a CW / Morse code signal (as a function of speed and rise/fall time) The occupied bandwidth (OBW) of a CW / Morse code signal is primarily dependent upon the keying speed (Words per minute / WPM) and the rise/fall time of the RF envelope. Radios and operator practice give you control over the WPM but not many radios give you control over the RF rise and fall time (which can have a major effect). This video shows measurements of the Occupied BW at various keyer speeds and RF rise/fall times. Equipment used in this video include: Tektronix MSO44B oscilloscope:" [YouTube Link](https://youtube.com/watch?v=KEgrTwjWLf0) 2024-03-28T01:41Z 226K followers, 19.8K engagements "#173: Introduction to RTL-SDR low cost software defined radio receivers A very generous subscriber donated an RTL-SDR DVB-T TV Tuner dongle to the channel (Thanks John N). This video gives a very brief introduction to these very inexpensive software defined radios. These little receivers can be picked up for $20 (or less) and the software to run them is available for free such as SDRsharp (SDR#) and HDSDR. A couple of very good links to get you started including a really great "getting started" page which walks you through step-by-step getting your first RTL-SDR up and running:" [YouTube Link](https://youtube.com/watch?v=KIvMqDgIALk) 2014-09-22T03:49Z 223K followers, 61.2K engagements "#363: Ham Radio Review: The Penntek TR-45 Lite 5-Band 5-Watt CW portable QRP transceiver This is a short review of the new Penntek TR-45L 5-band 5-watt CW QRP transceiver produced by WA3RNC. We take a look at the physical characteristics and the completely menu-less operation of the rig. Such a fun transceiver to operate Production expected to begin for factory wired/aligned units in early [----] to be followed by kit availability shortly after that. For more information visit the product webpage: https://www.wa3rnc.com/store/penntek-tr-45l-qrp-transceiver Inside pics:" [YouTube Link](https://youtube.com/watch?v=KJKUORhIGAI) 2022-12-11T19:30Z 226K followers, 61.3K engagements "#396: Demystifying Oscilloscope Triggering - what it does and how to use it This video discusses the basic function of triggering on both analog and digital oscilloscopes. It discusses what the end goal is the differences in the underlying operation of the triggering function in analog and digital scopes and how to setup a the most basic (and most common) trigger - a simple edge trigger. Links to other Oscilloscope Trigger video are listed below as well as a link to the PDF file of the notes from this video. Notes from this video: http://www.qsl.net/w2aew/youtube/DemystifyTriggering.pdf Basic" [YouTube Link](https://youtube.com/watch?v=N2novzfmVQ0) 2025-02-21T03:51Z 226K followers, 29.9K engagements "#11: Tektronix Oscilloscope Triggering controls and their usage This video describes the Triggering controls on a typical Tektronix analog oscilloscope. Other analog scopes will typically be similar. The video presents the Trigger Level Slope Source Coupling Mode and Holdoff controls and how each of them are used and their affect on the triggering capability of the scope" [YouTube Link](https://youtube.com/watch?v=OFGm-Pel4Hg) 2011-07-02T03:28Z 224K followers, 173.1K engagements "#267: Quick Tip: Making IC & Transistor part numbers easy to read This short article in EDN by Jay Davis reminded me of this great little trick to make laser-marked part numbers on ICs and transistors easier to read: http://www.edn.com/electronics-blogs/benchtalk/4458617/Simple-trick-lets-you-see-your-parts So I decided to make a video about it. All you need is a piece of tape" [YouTube Link](https://youtube.com/watch?v=OesIvcGdvoI) 2017-08-19T02:08Z 223K followers, 33.2K engagements "#373: Portable ham radio / POTA: The Spiderbeam 40' (12m) telescoping mast and hitch mounted support This short video shows my new Spiderbeam [--] meter (40 foot) telescoping mast and the trailer-hitch mounted support that I plan to use to support wire antennas for portable / POTA operations. I modified the "flagpole" mount to better accommodate the 40' tall mast. The specific products I used in this video are: Spiderbeam mast: http://www.vibroplex.com/contents/en-us/p3532.html Flagpole mount for 2" receiver: https://www.amazon.com/dp/B004IVGA0Gpsc=1&ref=ppx_yo2ov_dt_b_product_details PS: Found" [YouTube Link](https://youtube.com/watch?v=P3DZbFl9qmE) 2023-10-02T22:09Z 226K followers, 23.2K engagements "#120: How to Install Anderson Powerpole connectors This video shows how to install Anderson Powerpole connectors onto a power cable / wire. These connectors are very popular with the amateur / ham radio community as well as emergency and first response teams (ARES RACES CERT) as a universal reliable way to connect radio equipment to power sources (batteries vehicles power supplies). I also discuss the benefits and downsides of soldering these connectors. Table Of Contents: 0:00 - Introduction and stripping length 1:15 - Dovetails on Housings to mate housings together 2:00 - "Standard"" [YouTube Link](https://youtube.com/watch?v=QzLvdR6X81k) 2013-12-01T01:13Z 224K followers, 411.5K engagements "#293: The [----] ARRL Handbook for Radio Communications - Boxed Set - brief intro/review The 96th edition of the ARRL Handbook is now available as a 6-volume boxed set http://www.arrl.org/shop/ARRL-Handbook-2019 This video introduces the Handbook and briefly shows the contents of each volume. The new multi-volume boxed set option is a very handy and convenient way to enjoy this fabulous reference book. The handbook will appeal to anyone interested in learning more about electronics RF circuits and techniques and more. It's not just about amateur radio" [YouTube Link](https://youtube.com/watch?v=RtpgfHs9174) 2018-10-08T17:40Z 223K followers, 27.9K engagements "#334: How to tune a duplexer with a NanoVNA V2plus4 is it possible This video shows how to tune a 1.2GHz repeater duplexer using a NanoVNA V2plus4. A TX/RX Systems Vari-Notch duplexer is used in this video. One interesting question - does the NanoVNA V2plus4 have enough dynamic range to accurately tune the filters - particularly the notch / band-reject filter sections I check the results using a more professional VNA - the Tektronix TTR506A. A brief description of the function of the duplexer is given followed by the setup and calibration of the VNA and then the tuning process. SPOILER ALERT:" [YouTube Link](https://youtube.com/watch?v=TbEK4v_3Xuo) 2021-07-05T21:49Z 224K followers, 83.1K engagements "#99: Drag Soldering of an SSOP IC Package demonstration For soldering an SO-8 package see this video: http://www.youtube.com/watchv=7B_-qmJLfng This video shows the technique of drag soldering on an SSOP IC package. On this package the lead pitch is 0.025" (0.635mm). This lead pitch is a little too tight to be able to easily solder a lead at a time. Drag soldering works pretty well and is fairly easy to master with a little practice (and FLUX)" [YouTube Link](https://youtube.com/watch?v=TrdlKlkLdVQ) 2013-07-09T03:46Z 223K followers, [----] engagements "#297: Basics of the Smith Chart - Intro impedance VSWR transmission lines matching Recording of a presentation I gave at a VHF Amateur Radio Conference in October [----]. It covers the basics of the Smith Chart - what it is how you plot complex impedance obtain VSWR return loss reflection coefficient transmission line effects and compute impedance matching networks. This presentation covers topics presented in some of my other videos but does not include the live demonstrations shown in these videos: Visualize Antenna Tuner operation on a Smith Chart: https://www.youtube.com/watchv=f8wJ0io95RE" [YouTube Link](https://youtube.com/watch?v=TsXd6GktlYQ) 2019-03-07T18:09Z 223K followers, 263.2K engagements "#406: Current Regulator/Limiting Diodes (JFET) and their applications Current Regulator diodes also known as Current Limiting diodes are really JFET devices that provide a constant current for a variety of applications. My videos on JFET current sources and the basics of JFET devices may be handy background videos for you: JFET current sources: https://youtu.be/XJadPFYWglQ JFET Basics: https://youtu.be/oambDFa0Pr8 Several applications are shown - including linear ramp generation capacitor measurement current mirrors relaxation oscillator and differential amplifier gain stabilization. One of" [YouTube Link](https://youtube.com/watch?v=VXZH3UE-kSw) 2025-12-29T06:39Z 226K followers, 17K engagements "#268: How to operate a ZM-2 Z-Match Antenna Tuner kit by Emtech A short video showing how to operate the ZM_2 Z-Match antenna tuner. This is a kit by Emtech that I built 8-10 years ago and it works great. The built-in tuning indicator does a nice job indicating when a match is achieved especially when an SWR meter (in the rig or external) isn't available. This kit can be found here: https://steadynet.com/emtech/ More background on the Z-match tuner can be found via google and the links here: http://users.tpg.com.au/users/ldbutler/SingleCoilZMatch.htm http://www.qsl.net/g3vgr/zmatch.html" [YouTube Link](https://youtube.com/watch?v=XRO4Tiashls) 2017-08-30T19:42Z 222K followers, 32.3K engagements "#398: My build of the SolderSmoke Challenge Direct Conversion Receiver for 40m This video introduces my build of the 40m direct conversion receiver that was conceived by the fine folks on the SolderSmoke blog and podcast. This is a fun project to make a simple [--] transistor receiver (for AM SSB and CW) for the [--] meter amateur radio band (7.0 to 7.3MHz). Included below are several links with more information on this project: Intro video to the DCR Challenge Project from SolderSmoke's YT channel: https://www.youtube.com/watchv=rLjxU2rMeXw There are detailed videos on each functional block of" [YouTube Link](https://youtube.com/watch?v=XmUsA62CSuA) 2025-06-01T17:09Z 226K followers, 18.6K engagements "#185: Back to Basics: Bipolar Transistor bias circuits and Beta dependence This tutorial back-to-basics video discusses the operating point (or quiescent point Q-point bias point etc.) of a bipolar transistor (BJT) circuit and how the choice of the circuit design can affect how sensitive the bias point will be to the value of Beta (current gain) of the transistor. Ideally you'd want to use a circuit which is completely independent of beta so that a wide variety of transistors could potentially be used. Three different transistor bias circuits are demonstrated with three transistors each with" [YouTube Link](https://youtube.com/watch?v=YQlbPGNB-ys) 2014-12-02T12:01Z 225K followers, 126.4K engagements "#166: How to wind a trifilar toroid transformer for a diode ring mixer A short video demonstrating how I wind a trifilar wound toroidal transformer that is used in a classic diode ring mixer. A T37-6 toroid is used along with some 30AWG heat-strippable magnet wire making this mixer suitable for HF and low VHF operation. You'll find lots of great toroid data including winding data calculators etc. on this page - including the links at the top of the table: http://www.kitsandparts.com/toroids.php" [YouTube Link](https://youtube.com/watch?v=a8ViWS61hsU) 2014-08-12T21:44Z 224K followers, 50.2K engagements "#196: How a Directional Coupler in an SWR meter works This video describes how a dual directional coupler that is used in an SWR meter operates. It describes and demonstrates how voltages are developed that are directly proportional to the forward and reflected signals on a transmission line. The coupler shown is a common designed used by ham radio homebrewers in their SWR meter designs. It is widely published and can be found in several issues of the ARRL Handbook. Basics of Directional Couplers: https://www.youtube.com/watchv=iBK9ZIx9YaY Video Notes:" [YouTube Link](https://youtube.com/watch?v=byF1FLdbUiA) 2015-03-07T12:43Z 224K followers, 156.6K engagements "#321: Vintage Tech: The Simpson [---] VOM Volt-Ohm-Milliammeter family Video Table of Contents: 00:00 Introduction to the [---] 01:02 Common features of all [---] Series 03:00 Review of the Series [--] thru [--] 08:24 Continuing with Series [--] and [--] (and the odd probe connector) 10:35 Meaning of the suffix letters 11:25 A great website resource 11:49 What to look for when buying a used [---] 12:44 Common problems with older 260s 14:02 Final comments and advice 16:24 Closing This video discusses the Simpson [---] VOM family first introduced in the 1930s and still in production today. It is likely the most" [YouTube Link](https://youtube.com/watch?v=eXQLq4X47hk) 2020-12-08T05:20Z 225K followers, 47.9K engagements "#405: Using TinySA Ultra to measure keyer speed of a Kenwood TS-890S transceiver This video shows how to measure the keyer speed of a CW transmitter using a TinySA Ultra in Zero Span mode with a trigger. The formulas are simple: WPM = 1.2/unit_length and unit_length = 1.2/WPM .where: WPM = Words Per Minute unit_length = time duration of a "dit" The rig is a Kenwood TS-890S and the measurement verified that the WPM setting is accurate (unlike some rigs shown in my previous video linked below) Previous video detailing keyer speed measurements (#378): https://youtu.be/SvXelAaDPfI w2aew tek" [YouTube Link](https://youtube.com/watch?v=gaEm8TiRQnQ) 2025-12-13T18:20Z 226K followers, 32.2K engagements "#296: SSB & AM RF Envelopes Peak Envelope Power (PEP) Average Power and more The RF envelope of a single sideband (SSB) signal is compared to an Amplitude Modulated (AM) signal. RF power measurement is defined and illustrated including Peak Envelope Power (PEP) and Average Power. The RF output power considerations for both SSB and AM signals are presented and demonstrated. Notes from this video are found here: http://www.qsl.net/w2aew/youtube/PeakEnvelopePower.pdf" [YouTube Link](https://youtube.com/watch?v=i29pI7okLe4) 2019-01-21T00:03Z 222K followers, 60.7K engagements "#158: Directional Coupler Basics & how to sweep SWR of an antenna Return Loss VSWR This video describes the basic properties and specifications for directional couplers and shows their basic operation on an oscilloscope. Typical applications are discussed along with a practical example showing how to sweep the VSWR or Return Loss of an antenna using a directional coupler and a spectrum analyzer with a tracking generator. The resulting return loss measurement is compared to the SWR measured on an MFJ-259B antenna analyzer. Datasheet for the directional coupler used in this video:" [YouTube Link](https://youtube.com/watch?v=iBK9ZIx9YaY) 2014-07-06T04:41Z 224K followers, 218.2K engagements "#272: Vintage Tech: Sencore TC162 Tube Tester: How to use tips and peek inside This is a short overview of the Sencore TC162 Vacuum Tube (Valve) Tester including some basic tips on tube testing a review on how to use this tester and even a peek inside to see how it is built" [YouTube Link](https://youtube.com/watch?v=iJI8idipkf4) 2017-11-18T15:19Z 223K followers, 16.4K engagements "#405: The CurveBug - a dual octopus style debugging tool from VintageTEK The CurveBug is a debugging / troubleshooting 2-terminal curve-tracer tool developed by VintageTEK to benefit their non-profit operations. The function of the CurveBug is very similar to the well-known "octopus" tester - which is a highly simplified version of the Huntron Tracker. I did a video on the Octopus that has been viewed over [------] times: https://youtu.be/Gwo3pEH7hUE The CurveBug has two curve-tracer "channels" allowing you to simultaneously probe two circuits (one suspect one known good) to look for" [YouTube Link](https://youtube.com/watch?v=iyZ-Lj_fIAM) 2025-11-10T23:22Z 226K followers, 11K engagements "#303: What is a Pulse Counting FM Demodulator Detector Discriminator This video describes how a Pulse Counting FM Discriminator works - it is a unique FM demodulator that doesn't require and tuned circuits like the FM Ratio Detector or Foster Seeley discriminator. It operates by measuring the changing duty cycle resulting from a series or fixed width pulses that are synchronized to the carrier or IF frequency. Here is a link to Alan Yates' blog on a discrete FM broadcast receiver made using this technique: http://www.vk2zay.net/article/250 A link for the diode ring mixer (that I promised):" [YouTube Link](https://youtube.com/watch?v=jQlN2fc7LJc) 2019-08-22T17:23Z 224K followers, 41.7K engagements "#122: Electronic Circuit Construction Techniques: review of some prototype circuit building methods This video reviews several of the electronic circuit prototyping techniques that I like to use. Most of the circuits shown have been used in previous videos. This video focuses more on the methods and techniques used to build the circuits. Several examples are given along with web references. Please see the URL's below: Dave Richards (AA7EE) blog featuring a "WBR" receiver: http://aa7ee.wordpress.com/2011/07/24/the-wbr-a-simple-high-performance-regen-receiver-for-40m-by-n1byt/ His main blog" [YouTube Link](https://youtube.com/watch?v=kH110yjYZ2g) 2013-12-27T06:02Z 223K followers, 161.7K engagements "#65: Basics of using FFT on an oscilloscope This video briefly presents the basics of using a Fast Fourier Transform (FFT) function of a modern digital oscilloscope to observe the frequency or spectral content of a signal. It discusses how the setup of the scope (sample rate record length memory depth etc.) influences the frequency range and resolution of the FFT result. It also shows how the "high-resolution" sampling mode of the scope can be used to increase the vertical resolution of the scope. The example used shows the result of measuring the audio frequency content of the noise created" [YouTube Link](https://youtube.com/watch?v=oRf-IpG6XAw) 2012-11-08T23:24Z 226K followers, 193.7K engagements "#151: How to wind a toroid inductor A quick tutorial This video shows one method I use to wind toroidal inductors and transformers. The real trick is often how to hold the toroid core while doing the winding of the wire. The plastic toroid fixture shown is available from http://www.qrpme.com. I also give a few details on how to strip the enamel insulation and then test the inductor when it is complete. There are many many useful websites that contain toroid data including composition type size materials winding factors calculators and more. Here is a short list of the useful information you" [YouTube Link](https://youtube.com/watch?v=sDIWNHOoNh8) 2014-06-01T13:47Z 224K followers, 116.3K engagements "#270: Tune a Duplexer with a Spectrum Analyzer + Tracking Gen or VNA This video shows how to tune a notch-type duplexer using a spectrum analyzer with a tracking generator as well as with a vector network analyzer (VNA). It also discusses the basics of what a duplexer is and a quick review of the most popular types. Notes from the video can be found here: http://www.qsl.net/w2aew/youtube/DuplexerTuning.pdf" [YouTube Link](https://youtube.com/watch?v=tf5h_wz9G2o) 2017-11-04T04:11Z 224K followers, 129.9K engagements "#310: 3rd order Intermodulation Distortion (IMD) and their effect in radio receivers This short video discusses 3rd order IMD (intermodulation distortion) products what they are and how they can adversely affect radio reception under crowded band conditions. Finally I show how the proper use of input attenuation can help mitigate the negative effects of IMD. Notes: http://www.qsl.net/w2aew/youtube/3rd_order_IMD.pdf Spectrum display courtesy of the Spectrum View feature on a Tektronix MSO64 oscilloscope - gotta love that fast update rate even with 50Hz RBW" [YouTube Link](https://youtube.com/watch?v=uHrwBnPWakw) 2020-04-24T01:31Z 225K followers, 41.8K engagements "#195: RF Diplexer Basics: Tutorial construction and tuning This video introduces the RF Diplexer which is a pair of filters used to separate RF signals on a single feedline into two different feedlines based on their band of operation. These are commonly used with dual-band radios and satellite communications where the uplink is often in the VHF frequency band and the downlink is in the UHF frequency band. The circuit board is shown and the physical construction of the filter and hand-wound inductors is discussed. Then the diplexer is connected to the spectrum analyzer with tracking generator" [YouTube Link](https://youtube.com/watch?v=wv79DSqVi9w) 2015-02-22T22:39Z 224K followers, 46.3K engagements "#190: Back to Basics: Transistor Current Sources and Mirrors This video is a back-to-basics tutorial on transistor current sources - what they are some applications for them and some circuit examples. The basic characteristics of current sources and sinks are presented and demonstrated including the measurement of the output impedance of these simple current sources. Here is a link to the note pages used in this video: http://www.qsl.net/w2aew/youtube/transistorcurrentsources.pdf Viewer +BersekViking pointed out a problem with my test setup. Can you guess what it is Here is a link to my" [YouTube Link](https://youtube.com/watch?v=xR0RfmmRhDw) 2015-01-17T17:43Z 224K followers, 150.9K engagements "#255: Vintage Tech: Book review "ABC of Electricity" from [----] endorsed by Edison Just a short review of a book called "ABC of Electricity" published in [----] (intended for a younger audience) and endorsed by Thomas A. Edison. Very interesting to see the state of technology and how it is presented especially given that this was a few years before Lorentz' Electron theory was published" [YouTube Link](https://youtube.com/watch?v=xjnOzOFuC6U) 2017-03-25T18:40Z 224K followers, 10.6K engagements "#61: Basics of RF Samplers Sampling-Tees RF-taps etc. This video discusses the basics of what RF Samplers are why/when they are used and the design variations available. Samplers are used most often to "pick-off" a small sample of an RF signal (usually from a transmitter) to be measured with a scope spectrum analyzer deviation meter etc. W2AEW ham amateur radio transmitter tx RF frequency sampler sampling tee oscilloscope scope spectrum analyzer meter distortion deviation test dummy load power coupling adjustable capacitive resistive tutorial Bird watt wattmeter [--] [----] tap taps W2AEW ham" [YouTube Link](https://youtube.com/watch?v=0Kk_N_TpDeo) 2012-10-01T03:44Z 226K followers, 73.9K engagements "#93: RS232 and SPI bus waveforms bus decodes and RF activity on the Moteino using Tek MDO4000 Just having a little more fun on the bench with the Moteino (see previous video on this Arduino close with RFM12B wireless transceiver) and the Tektronix MDO4000 Mixed Domain Oscilloscope. Here we view the analog waveforms for two different low-speed serial busses (RS-232 and SPI) decode those busses and look at the RF spectrum characteristics and FSK modulation characteristics vs. time - all using a single capture on the scope. W2AEW Tek Tektronix MDO MDO4000 mixed domain oscilloscope scope RS232" [YouTube Link](https://youtube.com/watch?v=13_i-6Au2Ro) 2013-05-27T01:38Z 226K followers, 11.6K engagements "#224: AM & DSB-SC Modulation with the Gilbert Cell This video builds upon video #223 (intro to Gilbert Cell) - describing how AM (amplitude modulation) and DBS-SC (double sideband suppressed carrier) modulation can be performed using a Gilbert Cell as a balanced modulator. These modulation types are both possible with simple changes to the DC bias applied to the baseband inputs. Controlling the offset (and baseband signal magnitude) will set the modulation depth of the AM signal. The circuit used in the demonstration is essentially the same signal from video #223 with a minor change to enable" [YouTube Link](https://youtube.com/watch?v=38OQub2Vi2Q) 2015-12-31T06:01Z 226K followers, 54.9K engagements "#50: QRP SSB contact on 40m from Hamfest of RVRC June [----] This short video was taken at the June [----] Raritan Valley Radio Club hamfest in Piscataway NJ. The rig is an Icom IC-703 running less than 10Wpep on 40m SSB 7aH gel cell battery and a Par Electronics tri-band EFHW (end fed half wave) antenna supported by a 60' telescoping tower in an old mobile broadcast support van. The video shows a check-in with W8EB Bil net control for the Norcars net. W2AEW ham radio QRP low power battery par end fed half wave efhw ssb 40m Norcars net tailgate hamfest RVRC raritan Valley Piscataway NJ Icom" [YouTube Link](https://youtube.com/watch?v=4pJlXhFZ05M) 2012-06-17T01:13Z 226K followers, [----] engagements "#344: ARRL 49:1 End Fed Halfwave UNUN transformer kit from HFKits - Build and quick bench test Today's video features the ARRL EFHW Antenna Kit by HFKits.com which is essentially a nice weatherized 49:1 UNUN Transformer to convert the 2500-3000 ohm end-fed halfwave feedpoint impedance down to approximately [--] ohms. I review how to build/assemble the unit and run a quick bench test. The kit is available from the ARRL as well as HFKits. Here are a few links: ARRL: Sale page: http://www.arrl.org/shop/End-Fed-Half-Wave-Antenna-Kit-for-10-15-20-40-Meters/ Instructions:" [YouTube Link](https://youtube.com/watch?v=7XUWOSy_CVE) 2021-12-26T21:29Z 226K followers, 84.4K engagements "#246: How to operate / tune the Yaesu FRG-7 Frog-7 Receiver This video shows how to tune the Yaesu FRG-7 Communications Receiver. It operates a little differently than a conventional receiver due to the Wadley Loop architecture being used. It shows the details on how to use the preselector and megahertz tuning controls. For more information on the Wadley Loop circuit please see my previous video: https://www.youtube.com/watchv=JvS9tBWAc1s W2AEW Tek Tektronix HF receiver communication receiver receiver tune how to instruction tutorial wadley loop preselect preselection preselection filter" [YouTube Link](https://youtube.com/watch?v=8fhnt8wdo-w) 2016-10-03T20:29Z 226K followers, 46.9K engagements "#316: Use NanoVNA to measure coax length - BONUS Transmission Lines and Smith Charts SWR and more TWO Part video: Part [--] shows how to use the Transform function in the NanoVNA to measure coax length or distance to fault. Part [--] (starting at about 4:40) digs a bit deeper into the effects of a transmission line on the observed impedance and SWR how this is represented on the Smith Chart and some of the "magic" of quarter-wavelength long lines. I refer to a video on a T/R Switch that uses PIN Diodes and a 1/4 wavelength line: https://www.youtube.com/watchv=A1BAq0KxIdc Here are the notes and" [YouTube Link](https://youtube.com/watch?v=9thbTC8-JtA) 2020-06-28T04:51Z 226K followers, 174.3K engagements "#407: Installation of Yaesu optional 500Hz Collins Mechanical Filter in the FT-857D This video shows the simple installation of the optional Collins Mechanical Filter in the Yaesu FT-857D transceiver. Yaesu offered three different optional filters - the YF-122S 2.3kHz filter for SSB (single sideband) the YF-122C 500Hz filter for CW and the YF-122CN 300Hz CW filter. The video shows the 500Hz CW filter and then verifies it's operation while listening to several CW signals. w2aew tek tektronix yaesu ft-857d ham radio transciever filter collins mechanical CW morse code SSB w2aew tek tektronix" [YouTube Link](https://youtube.com/watch?v=B4hFwotkZvw) 2026-01-16T21:48Z 226K followers, [----] engagements "#97: Low Power (QRP) Ham Radio contact at the [----] RVRC Hamfest in NJ This video clip was shot by my friend Bob KC2RDU. It shows me making a low power (QRP) contact to a ham in NC from our club's annual hamfest in NJ. This was at about 6:40AM local time. The contact was made with Joe KJ4RNW in NC using an Icom IC-703+ running approx 5W using a end-fed half-wave antenna. W2AEW QRP Ham Radio Hamfest QSO Contact Low Power W2AEW QRP Ham Radio Hamfest QSO Contact Low Power" [YouTube Link](https://youtube.com/watch?v=CTYHujmTuGg) 2013-06-23T04:44Z 226K followers, [----] engagements "#342: Mini review: County Comm GP-7 / SSB handheld AM/FM/SW/SSB/CW Receiver Contents: 00:00 Introduction 00:59 Overview of improvements over GP-5/SSB 01:57 Weight Battery and Volume Control differences 03:57 Lets try out some features: Shortwave reception example 04:08 Band Selection Controls 04:47 Ham Radio Band Selection 05:04 Tuning Controls and Step Size 05:52 Auto-scan in VFO Mode 06:18 Direct Frequency Entry 06:53 Ham Radio goodies - step size and filter bandwidth 07:17 Filter BW example on CW 08:46 View filter BW using FFT on an oscilloscope 10:29 SSB Reception example on 40m band" [YouTube Link](https://youtube.com/watch?v=DijCfU52x2k) 2021-11-27T04:15Z 226K followers, 20.1K engagements "#119: Basics of Resolution Bandwidth and Video Bandwidth in a Spectrum Analyzer (RBW VBW) This is a tutorial and demonstration of the basics of the Resolution BW (RBW) and Video BW (VBW) functions in a Spectrum Analyzer. You may wish to review the "Basics of a Spectrum Analyzer" video if you are unfamiliar with the basic functions and block diagram of a swept spectrum analyzer. Here is the link for that video: http://www.youtube.com/watchv=4Y6ji0QBsww This video covers the definition of these terms where they exist in the analyzer what they do and the effects they have on the displayed" [YouTube Link](https://youtube.com/watch?v=Ffhs9Ny03lM) 2013-11-23T04:24Z 226K followers, 179.8K engagements "#409: Ham Radio: POTA go-kit using a Hidden Woodsman M55 Haversack for the Elecraft KX2 This video shows a go-kit I put together for my Parks On The Air (POTA) amateur radio field operations. It uses a M55 Haversack from Hidden Woodsman. I need to blame/thank my good friend Thomas K4SWL for introducing me to this pack in his blog and video: https://qrper.com/2026/01/hidden-woodsmen-haversack-first-pota-test-of-my-new-ft-818-field-kit/ https://youtu.be/bshcVL7XZYk This bag can be purchased here: https://thehiddenwoodsmen.com/product/m55-haversack/ w2aew Tek Tektronix M55 Haversack POTA parks" [YouTube Link](https://youtube.com/watch?v=HsRtTghu-yM) 2026-02-01T21:50Z 226K followers, [----] engagements "#156: Hamfest Highlights of the [----] RVRC Hamfest in Piscataway NJ A collection of highlights and happenings from the [----] Raritan Valley Radio Club hamfest in Piscataway NJ held on [--] June [----]. Great vendors and tailgaters a bit of QRP radio operation and fantastic weather. http://www.w2qw.org http://www.w2qw.net https://www.youtube.com/user/radiowild http://www.manualman.com/ http://www.hypowerantenna.com/ http://www.kjielectronics.com/ Hamfest New Jersey (US State) Piscataway (City/Town/Village) W2AEW Tek Tektronix ham radio Amateur Radio (Hobby) RVRC oscilloscope QRP SSB CW EFHW antenna" [YouTube Link](https://youtube.com/watch?v=NnSuN1MPLD0) 2014-06-21T20:38Z 226K followers, [----] engagements "#159: How to measure FM frequency deviation with a spectrum analyzer This short video shows a quick way to get a good estimate of the frequency deviation of a FM transmitter using a spectrum analyzer. This method isn't as accurate as the Bessel Null method shown in this video: https://www.youtube.com/watchv=8IBOYoIV5m8 But is is faster and easier to setup and doesn't require a single adjustable modulation tone. The RBW is set wide enough to "swallow up" the sidebands and then a min hold and max hold trace are used to capture the excursion. The frequency difference between the skirts of these" [YouTube Link](https://youtube.com/watch?v=Nw3_w1HrlEs) 2014-07-12T04:17Z 226K followers, 66.7K engagements "#198: Basics of a Vbe Multiplier: what it is how it works & where it is used The Vbe Multliplier circuit also known as an Amplified Diode or Adjustable Diode is a useful circuit that allows you to set a user desired voltage drop without using a series combination of diodes or zeners. This video describes and demonstrates how this circuit works and shows a few applications where it is used. It is commonly used to set the bias on a low-impedance push-pull output stage of an amplifier. All transistors shows are typical general purpose devices like the 2N3904/2N3906. The scope is being used as a" [YouTube Link](https://youtube.com/watch?v=Obh_PIC2qqo) 2015-03-19T18:52Z 226K followers, 85.5K engagements "#74: Basics of Differential Probes for Oscilloscopes and their applications: a tutorial This video gives the basics of differential oscilloscope probes. It defines what they are and discusses why and how they are typically used. A few examples of typical applications for diff-probes are given. W2AEW Tek Tektronix oscilloscope scope probe differential ground float floating common mode mode rejection noise ratio flexray ethernet usb audio balanced bridge driver SMPS switching power FET inverter data serial tutorial W2AEW Tek Tektronix oscilloscope scope probe differential ground float floating" [YouTube Link](https://youtube.com/watch?v=RDLWQFgJ1uU) 2013-01-14T03:52Z 226K followers, 89.9K engagements "#60: Basics of Phase Locked Loop Circuits and Frequency Synthesis This tutorial style video presents the basics of Phase Locked Loop circuits. A basic block diagram of a PLL is shown and the individual blocks are discussed. The Voltage Controlled Oscillator (VCO) is described and demonstrated. The two basic types of Phase Comparators/Detectors often referred to as Type I and Type II are described and demonstrated. Then the overall operation of the PLL is demonstrated. The addition of a simple divide-by-2 is shown and how this is used to double the output frequency of the VCO the basis for" [YouTube Link](https://youtube.com/watch?v=SS7z8WsXPMk) 2012-08-31T20:29Z 226K followers, 282.7K engagements "#273: Common Emitter Amplifier Design Tips & Shortcuts This video provides some basic design tips and shortcuts for the Common Emitter Class A Amplifier. The considerations for selection of the DC Bias point are presented as well as some tips on how to set/compute the gain for both degenerated and high-gain configurations. Below you will find links for related videos and for a PDF copy of the notes used in this video: #185: BJT Bias and Beta Dependence: https://www.youtube.com/watchv=YQlbPGNB-ys #113: Bias point and Class of operation: https://www.youtube.com/watchv=c6cmkm3UPUI #114: Common" [YouTube Link](https://youtube.com/watch?v=VWY2WQcKJgk) 2017-11-29T23:12Z 226K followers, 134.9K engagements "#118: Basics of PIN diodes and their use in RF switch applications This is a basic tutorial on PIN Diodes with some examples of how they are used in RF switch applications. I previously published a video that introduced the topic of how diodes can be used as switches: http://www.youtube.com/watchv=YBNIq_d56sA This video takes this a step further discussing the unique characteristics of PIN diodes and how these characteristics are used for switching large RF signals. The unique ability to have the resistance of the diode be adjusted by changing the bias current can be used for other" [YouTube Link](https://youtube.com/watch?v=XpYsCM_Wf50) 2013-11-09T02:52Z 226K followers, 135.3K engagements "#82: How to use a Diode as a Switch / Diodes as Switches / Basics of Diode Switches This video answers a lot of questions about how diodes can be used to switch AC / RF signals. A lot of questions were asked about this after my last two videos which reviewed the schematics of a couple of QRP transceivers. These transceivers used a lot of diode switching. This video shows the basics of small signal switching with diodes and also discusses large signal switching with PIN diodes. W2AEW Tek Tektronix RF diode diodes PIN PIN diode switch attenuator modulator radio QRP Heathkit MFJ transceiver" [YouTube Link](https://youtube.com/watch?v=YBNIq_d56sA) 2013-02-28T00:45Z 226K followers, 130.2K engagements "#52: Tutorial / Basics of a Dip Meter This video presents the basics of a Solid State Dip Meter which is the more "modern" equivalent of the old classic Grid Dip Meter (GDO). The GDO was simply a vacuum tube based oscillator with a meter that read grid current as a measure of the oscillation strength/magnitude. The solid state dip meter uses a solid state RF oscillator and detector circuit to perform the same function. The Dip Meter (or Dipper) I show in the video is a Heathkit HD-1250 that I built as a kid in [----] or '77. The dipper is mainly used to determine or measure the resonant" [YouTube Link](https://youtube.com/watch?v=_HwIL6mqq_k) 2012-07-06T02:58Z 226K followers, 104K engagements "#153: How to tune up a Kenwood TS-830S hybrid rig / transceiver TS-520 TS-530 TS-820 A quick video showing the proper procedure to quickly tune up the transmitter on a Kenwood hybrid rig like the TS-830S TS-820S TS-530S TS-520S etc. using the DRIVE PLATE LOAD CAR and MIC gain controls. As always you should tune up into a dummy load if available. Also be sure to limit the transmit time while tuning to about [--] seconds or less. This is based on the user manual and the excellent how-to guide offered on Terry K9TW's website http://www.k9tw.com. Of course this video assumes that the rig is in" [YouTube Link](https://youtube.com/watch?v=bTVpQ18dn1o) 2014-06-06T04:11Z 226K followers, 113.1K engagements "#234: Basics of Near Field RF Probes E-Field & H-Field How-to use Near Field RF probes can be very helpful when tracking down sources of unwanted RF emissions or radiation. This video presents the basics of the E-Field and H-Field probes how they work and how to use them. Here are some useful links on near field probing including plans and discussions on how to make your own near field probes: My show notes pages: http://www.qsl.net/w2aew/youtube/NearFieldProbes.pdf Good thread on EEVBlog: http://www.eevblog.com/forum/projects/diy-magentic-field-probes/ Easy to build H-field probe:" [YouTube Link](https://youtube.com/watch?v=ctynv2klT6Q) 2016-03-26T21:08Z 226K followers, 111.9K engagements "#375: Ham Radio Quickie: Ground Radial wires vs. the "Magic Carpet" Faraday cloth Just a quick video to document my quick comparison of portable vertical antenna VSWR sweeps using my ground radials vs. a conductive fabric mat often called a "magic carpet". Note that these results are specific to my antenna configuration your results may vary. I kept "everything" constant/unchanged between the two configurations to get an apples-to-apples comparison" [YouTube Link](https://youtube.com/watch?v=f-Gc1W2UNRo) 2023-10-31T01:23Z 226K followers, 37.3K engagements "#170: Basics of IQ Signals and IQ modulation & demodulation - A tutorial This video presents an introductory tutorial on IQ signals - their definition and some of the ways that they are used to both create / generate modulated RF signals and demodulate / analyze RF signals. IQ signals are most often used in the transmit and receive paths of Software Define Radios (SDR). A PDF of the drawings can be found here: http://www.qsl.net/w/w2aew//youtube/Basics_IQ_signals_modulation.pdf Here's a recent blog post (not mine) that also explains this quite clearly:" [YouTube Link](https://youtube.com/watch?v=h_7d-m1ehoY) 2014-09-03T00:49Z 226K followers, 581.4K engagements "#326: How to Measure the impedance of "unknown" coax using a NanoVNA This short tutorial video shows how to use the NanoVNA to measure the impedance of an unmarked piece of coax transmission line. It uses the unique impedance transformation that occurs with a quarter-wavelength transmission line. By measuring the resistive component of the line at a frequency at which the line is a quarter-wavelength long the unknown line impedance is simply the square root of the product of the termination impedance and the measured value. See this playlist of additional tutorials using the NanoVNA:" [YouTube Link](https://youtube.com/watch?v=hqKLFbNYRZc) 2021-01-04T02:30Z 226K followers, 75.7K engagements "#1: QRP Check-in to NorCars net from RVRC Hamfest June [------] Check-in to NorCars 40m net on June [--] [----] from the Raritan Valley Hamfest in Piscataway NJ. Rig is an Icom IC-703+ running off of a 7AH gel-cell into a SuperAntenna MP-1 with an extended 10' whip section. Power is less than 10W-PEP. Note that the net control station K1AJD is in New Hampshire not Vermont as I stated in the video - oops FILE0011 FILE0011" [YouTube Link](https://youtube.com/watch?v=iSo7oHvBbog) 2010-10-14T18:17Z 226K followers, 22K engagements "#408: Distortion using Class A B AB and C amplifier types (by request) This video is by request of a viewer of my video on Class A B AB and C types of amplifiers. He asked what the distortion looked like using the FFT on the scope. The original video on the details of the various operating classes of amplifiers can be found here: https://youtu.be/c6cmkm3UPUI In this video we look at the distortion on the FFT as well as a quick Total Harmonic Distortion (THD) measurement. I also show a simple resonant load and how it is used to reduce the distortion of the Class AB B and C amplifier states." [YouTube Link](https://youtube.com/watch?v=jMmCB8MOICE) 2026-01-22T04:35Z 226K followers, 16.4K engagements "#140: Basics of an Op Amp Summing Amplifier A tutorial on the basics of an inverting and non-inverting summing amplifier using an op amp. The video assumes a basic knowledge of how inverting and non-inverting amplifiers using op amps work. If you are unfamiliar with this I'd recommend viewing my video on how to easily understand the operation of most opamp circuits: http://www.youtube.com/watchv=K03Rom3Cs28 or Dave Jones (EEVBlog)'s video on op amp basics: http://www.youtube.com/watchv=7FYHt5XviKc The theory is presented and measurements are made on the bench using the same circuit" [YouTube Link](https://youtube.com/watch?v=juQtVIx1a8g) 2014-04-14T05:07Z 226K followers, 73.6K engagements "#124: How to install an RJ45 connector on a CAT5 Ethernet network Patch Cable - DIY Repair A quick video to show how to install a new RJ45 connector on a CAT5/CAT5e Ethernet or network cable to make a new patch cord or repair a broken connector. All it takes is a little patience and a few tools. It pays to have the right tools to install the connector and test the cable afterwards. The cost of the tools can often be recovered after making or repairing just a few cables. W2AEW Tek Tektronix Ethernet (Invention) Category [--] Cable (Invention) Patch Cable Electrical Connector Technology How-to" [YouTube Link](https://youtube.com/watch?v=k4aL62ixJVc) 2014-01-06T22:45Z 226K followers, 868.1K engagements "#284: Basics of RF Bias Tees including applications and examples Bias Tees are RF components that are used whenever you need to couple a DC power or low-speed control signal onto an RF signal path. This video discusses the basics of Bias Tees how they work examples of practical construction and a few lab application examples showing them "in action". Links for the Bias Tees used in this video as well as a copy of the video notes are here: https://www.minicircuits.com/pdfs/ZFBT-4R2GW+.pdf https://www.minicircuits.com/pdfs/ZX85-12G+.pdf http://www.dorkage.com/youtube/Basics_of_Bias_Tees.pdf" [YouTube Link](https://youtube.com/watch?v=lxgpm-UXTNY) 2018-06-20T15:49Z 226K followers, 71K engagements "#193: Back to Basics: the differential amplifier aka long-tailed pair diff-pair Back to basics introduction to the differential amplifier aka the diff-pair long-tailed pair emitter coupled pair etc. The basic operation of the circuit is presented along with a simple mechanical simulation. Also how the addition of current sources and mirrors can be used to address some of the performance issues and begin to form the rudimentary beginnings of an op amp. This is the follow-up video from "teaser" video published earlier. Teaser video: http://www.youtube.com/watchv=zhM3rPHFgt4 Video note pages:" [YouTube Link](https://youtube.com/watch?v=mejPNuPAHBY) 2015-01-31T16:18Z 226K followers, 146.9K engagements "#329: Presentation recording: Intro to the VNA and NanoVNA for BayCon [----] This is a recording of my presentation on the Basics of a VNAs and the NanoVNA that was prepared for the Bay-Net.org annual BayCon [----] Virtual Conference. It covers the basics of a vector network analyzer and the NanoVNA. This is a bit more formal presentation of material that can be found in several of my other NanoVNA videos on this channel. Website for Bay-Net: http://www.bay-net.org/ Full recorded livestream from BayCon 2021: https://www.youtube.com/watchv=AJGhu8r7cYU W2AEW Tek Tektronix NanoVNA how-to tutorial" [YouTube Link](https://youtube.com/watch?v=o1eLK4EMpEQ) 2021-02-07T05:02Z 226K followers, 55.3K engagements "#219: Back to Basics: Introduction to Field Effect Transistors JFET MOSFET A basic introduction to the Field Effect Transistor (FET). This includes a basic description of the Junction FET (JFET) and the Metal Oxide FET (MOSFET) and also discusses N-Channel vs. P-Channel as well as Depletion Mode and Enhancement Mode type devices. The function of the Gate Source and Drain terminals are reviewed. The linear region and saturation region of operation of the devices is described and demonstrated. In a short video like this it is impossible to get into depth in any application - the intent with" [YouTube Link](https://youtube.com/watch?v=oambDFa0Pr8) 2015-11-29T16:27Z 226K followers, 185.7K engagements "#206: Importance of 10X Probe Compensation with your Oscilloscope This video discusses the importance of proper 10x probe compensation and what can happen if the probe is not properly compensated. Also it reviews why a very high frequency probe paired with a much lower BW scope might actually give you worse frequency response than a lower bandwidth probe. If you are interested in a deeper background on the Basics of 10X Probes please see this video: https://www.youtube.com/watchv=SX4HGNWBe5M The notes page from this video can be found here:" [YouTube Link](https://youtube.com/watch?v=oxJQr4dKnys) 2015-07-07T23:37Z 226K followers, 42.7K engagements "#338: Probe Tips: Beware of capacitive loading of oscilloscope probes on your circuit operation The capacitive loading of your oscilloscope probe might affect the operation of your circuit - certainly something to keep in mind when probing around. The test circuit used in this video is shown at 11:08 in this video: https://www.youtube.com/watchv=G9zZRNzhsEE&t=668s .and I'm probing across Cs in the lower left corner of the schematic. 1X passive probe can have 100pF or more of capacitive loading which can dramatically affect many circuits. 10X probes are typically 8-15pF or so with some" [YouTube Link](https://youtube.com/watch?v=sPSJnj7gVJA) 2021-10-06T03:01Z 226K followers, 27.3K engagements "#377: How to install a crimp-on BNC connector to RG-8X coax cable This video shows how to install a crimp-on type BNC male connector onto RG-8X coax cable. The connector shown is available from Max-Gain Systems. The specific connector used here can be found at: https://mgs4u.com/product/bnc-male-crimp-connector-for-0-240-inch-od-coax-7005-bnc-8x/ The installation guide datasheet etc. can all be found on this page as well. W2AEW Tek Tektronix coax how-to crimp connector BNC W2AEW Tek Tektronix coax how-to crimp connector BNC" [YouTube Link](https://youtube.com/watch?v=sap8XC16Lb8) 2023-11-30T02:31Z 226K followers, 34.8K engagements "#400: Measuring the Minimum Discernable Signal and bandwidth of the 40m Direct Conversion receiver. This video shows the measurement of the Minimum Discernable Signal level (MDS) of the Soldersmoke Challenge Direct Conversion 40m receiver - which is a decent measurement of the sensitivity. I also show the measurement of the receiver bandwidth and then use that to "correct" the MDS value so that it can be basically compared to the standard measurement of MDS which uses a 500Hz receiver BW. More information on the receiver I'm testing see video #398 and the notes shown for that video:" [YouTube Link](https://youtube.com/watch?v=vR9_sLGFTJY) 2025-06-28T15:22Z 226K followers, 14.6K engagements "#235: Basics of Analog Panel Meters Analog meter movements D'Arsonval This video covers the basics of analog panel meter movements how they work how to test and characterize them and even how to modify the face for your custom application. These meters can be found on the surplus and ham/hobby market and can make nice enhancements for projects you might be working on. Here is a link to the custom meter scale software: http://www.tonnesoftware.com/meter2.html A copy of the notes page from this video can be found here: http://www.qsl.net/w2aew/youtube/AnalogPanelMeters.pdf W2AEW Tek Tektronix" [YouTube Link](https://youtube.com/watch?v=wbRx5cQZ8Ts) 2016-04-09T22:58Z 226K followers, 119.7K engagements "#313: Why a VNA needs to be calibrated how to calibrate a nanoVNA This video describes why a "user" calibration is needed when using a VNA (vector network analyzer) what systematic errors it corrects for what is meant by a measurement plane or calibration plane and finally an example of how the calibration is performed on a nanoVNA. Note from this video can be found here: http://www.qsl.net/w2aew/youtube/why_calibrate_a_VNA.pdf W2AEW Tek Tektronix nanoVNA VNA vector network analyzer network analyzer RF calibration tutorial how-to SWR VSWR return loss reflection coefficient S parameters S11" [YouTube Link](https://youtube.com/watch?v=x-tbvAbh9jk) 2020-06-13T03:51Z 226K followers, 84.3K engagements "#86: Improved NTSC video to Oscilloscope converter circuit / scope video monitor hack This video is a follow-up from a video I posted in May [----] which showed a simple circuit that converts an NTSC video signal into the X and Y scan voltages and Z-input drive signals to make the oscilloscope into a simple monochrome video monitor. The circuit shown in that video had a couple of short comings and limitations. This video shows some improvements to that circuit which improve the video quality the brightness and contrast control as well as the ability to work with some additional oscilloscopes." [YouTube Link](https://youtube.com/watch?v=yf4kOMSPbM0) 2013-04-09T02:18Z 226K followers, 40K engagements "#114: Tutorial: Common Emitter Common Collector and Common Base Transistor amplifiers Back to Basics tutorial on the fundamentals of the three bipolar transistor amplifier topologies. The basic configuration and characteristics of each type of amplifier are discussed and demonstrated. This video does not provide detailed design instruction but rather just a basic introduction to each type their basic characteristics and applications and demonstrations of their operation. A copy of the video drawings can be found here: http://www.qsl.net/w/w2aew//youtube/Common_Emitter_CC_CB_amplifiers.pdf" [YouTube Link](https://youtube.com/watch?v=zXh5gMc6kyU) 2013-10-09T03:31Z 226K followers, 240K engagements "#409: Ham Radio: POTA go-kit using a Hidden Woodsman M55 Haversack for the Elecraft KX2 This video shows a go-kit I put together for my Parks On The Air (POTA) amateur radio field operations. It uses a M55 Haversack from Hidden Woodsman. I need to blame/thank my good friend Thomas K4SWL for introducing me to this pack in his blog and video: https://qrper.com/2026/01/hidden-woodsmen-haversack-first-pota-test-of-my-new-ft-818-field-kit/ https://youtu.be/bshcVL7XZYk This bag can be purchased here: https://thehiddenwoodsmen.com/product/m55-haversack/ w2aew Tek Tektronix M55 Haversack POTA parks" [YouTube Link](https://youtube.com/watch?v=HsRtTghu-yM) 2026-02-01T21:50Z 226K followers, [----] engagements "#408: Distortion using Class A B AB and C amplifier types (by request) This video is by request of a viewer of my video on Class A B AB and C types of amplifiers. He asked what the distortion looked like using the FFT on the scope. The original video on the details of the various operating classes of amplifiers can be found here: https://youtu.be/c6cmkm3UPUI In this video we look at the distortion on the FFT as well as a quick Total Harmonic Distortion (THD) measurement. I also show a simple resonant load and how it is used to reduce the distortion of the Class AB B and C amplifier states." [YouTube Link](https://youtube.com/watch?v=jMmCB8MOICE) 2026-01-22T04:35Z 226K followers, 16.4K engagements "#407: Installation of Yaesu optional 500Hz Collins Mechanical Filter in the FT-857D This video shows the simple installation of the optional Collins Mechanical Filter in the Yaesu FT-857D transceiver. Yaesu offered three different optional filters - the YF-122S 2.3kHz filter for SSB (single sideband) the YF-122C 500Hz filter for CW and the YF-122CN 300Hz CW filter. The video shows the 500Hz CW filter and then verifies it's operation while listening to several CW signals. w2aew tek tektronix yaesu ft-857d ham radio transciever filter collins mechanical CW morse code SSB w2aew tek tektronix" [YouTube Link](https://youtube.com/watch?v=B4hFwotkZvw) 2026-01-16T21:48Z 226K followers, [----] engagements "#406: Current Regulator/Limiting Diodes (JFET) and their applications Current Regulator diodes also known as Current Limiting diodes are really JFET devices that provide a constant current for a variety of applications. My videos on JFET current sources and the basics of JFET devices may be handy background videos for you: JFET current sources: https://youtu.be/XJadPFYWglQ JFET Basics: https://youtu.be/oambDFa0Pr8 Several applications are shown - including linear ramp generation capacitor measurement current mirrors relaxation oscillator and differential amplifier gain stabilization. One of" [YouTube Link](https://youtube.com/watch?v=VXZH3UE-kSw) 2025-12-29T06:39Z 226K followers, 17K engagements "#405: Using TinySA Ultra to measure keyer speed of a Kenwood TS-890S transceiver This video shows how to measure the keyer speed of a CW transmitter using a TinySA Ultra in Zero Span mode with a trigger. The formulas are simple: WPM = 1.2/unit_length and unit_length = 1.2/WPM .where: WPM = Words Per Minute unit_length = time duration of a "dit" The rig is a Kenwood TS-890S and the measurement verified that the WPM setting is accurate (unlike some rigs shown in my previous video linked below) Previous video detailing keyer speed measurements (#378): https://youtu.be/SvXelAaDPfI w2aew tek" [YouTube Link](https://youtube.com/watch?v=gaEm8TiRQnQ) 2025-12-13T18:20Z 226K followers, 32.2K engagements "#405: The CurveBug - a dual octopus style debugging tool from VintageTEK The CurveBug is a debugging / troubleshooting 2-terminal curve-tracer tool developed by VintageTEK to benefit their non-profit operations. The function of the CurveBug is very similar to the well-known "octopus" tester - which is a highly simplified version of the Huntron Tracker. I did a video on the Octopus that has been viewed over [------] times: https://youtu.be/Gwo3pEH7hUE The CurveBug has two curve-tracer "channels" allowing you to simultaneously probe two circuits (one suspect one known good) to look for" [YouTube Link](https://youtube.com/watch?v=iyZ-Lj_fIAM) 2025-11-10T23:22Z 226K followers, 11K engagements "#404: The VFET is a JFET that thinks it is a Triode vacuum tube - aka Static Induction Transistor This video is a quick introduction to the Static Induction Transistor also known as a Vertical FET or VFET. This device is a JFET that behaves like a vacuum tube Triode. You may want to refresh yourself on what a Junction Field Effect Transistor (JFET) is and it's characteristics by reviewing this video: https://youtu.be/oambDFa0Pr8 Here is a really nice writeup on these devices from an audio applications perspective: https://fromvinyltoplastic.com/what-are-static-induction-transistors-sit/ The" [YouTube Link](https://youtube.com/watch?v=93ke5wM0gZ0) 2025-10-24T01:56Z 226K followers, 17.7K engagements "#403: Measuring a Directional Coupler with a SV4401A VNA This video shows the process of setting up calibrating and using a SV4401A Vector Network Analyzer to characterize the Return Loss (Reflection Coefficient) VSWR Mainline Loss (Transmission Coeff) Coupling Ratio and Directivity of a Mini-Circuit ZFDC-20-5+ directional coupler over a 100kHz to 2GHz frequency range. 00:00 Introduction 00:28 Review of Measurements of a Directional Coupler 02:14 Specifications of the Mini Circuit ZFDC-20-5+ 03:53 Setup VNA Frequency Range 04:17 Calibration Considerations 05:17 Calibration Process 07:00 Setup" [YouTube Link](https://youtube.com/watch?v=uGSCXYTdFnM) 2025-09-10T03:41Z 226K followers, [----] engagements "#402: Overview of the Sysjoint SV4401A Vector Network Analyzer from Chelegance This video provides an overview / introduction to the Sysjoint SV4401A 4.4GHz VNA offered by Chelegance. It provides an overview of the features and simple menu structure of the unit. More info specifications documentation and distributors can be found on the Chelegance site linked below: https://chelegance.com/products/sv4401a-4-4g-vna-with-7-capacitive-touchscreen/ w2aew tek Tektronix vna nanovna network analyzer vector network analyzer ss4401a sysjoint chelegance introduction w2aew tek Tektronix vna nanovna" [YouTube Link](https://youtube.com/watch?v=FRHU7EgSwgU) 2025-08-23T04:43Z 226K followers, 14.6K engagements "#401: Tool Time: What is a Wiggy Ans: A Solenoid-type Voltage Tester Taking a bit of a departure from electronics - this video introduces a tool that is very popular with electricians - the Wiggy a solenoid-type AC/DC voltage tester with some very interesting features and characteristics. W2AEW Tek Tektronix Square D Wiggy AC DC voltage tester W2AEW Tek Tektronix Square D Wiggy AC DC voltage tester" [YouTube Link](https://youtube.com/watch?v=LLpHE6dW1pI) 2025-07-13T02:41Z 226K followers, 12.2K engagements "#400: Measuring the Minimum Discernable Signal and bandwidth of the 40m Direct Conversion receiver. This video shows the measurement of the Minimum Discernable Signal level (MDS) of the Soldersmoke Challenge Direct Conversion 40m receiver - which is a decent measurement of the sensitivity. I also show the measurement of the receiver bandwidth and then use that to "correct" the MDS value so that it can be basically compared to the standard measurement of MDS which uses a 500Hz receiver BW. More information on the receiver I'm testing see video #398 and the notes shown for that video:" [YouTube Link](https://youtube.com/watch?v=vR9_sLGFTJY) 2025-06-28T15:22Z 226K followers, 14.6K engagements "#399: Review: 3D-printed Straight-key with a great story - by the HamRadioDuo This 3D printed straight-key by Mike (N4FFF) and Becky (N4BKY) inspired by the J-38 has a great story and mission behind it - take a look at the video. For more information see the links below: Where to get the key: https://shop.hamradioduo.com/ HamRadioDuo Youtube channel: https://www.youtube.com/@HamRadioDuo Their tools page on website: https://www.hamradioduo.com/tools/ The main HamRadioDuo webpage: https://www.hamradioduo.com W2AEW Tek Tektronix ham radio morse code straight key W2AEW Tek Tektronix ham radio" [YouTube Link](https://youtube.com/watch?v=_uSyl1tj4J4) 2025-06-13T13:40Z 226K followers, [----] engagements "#398: My build of the SolderSmoke Challenge Direct Conversion Receiver for 40m This video introduces my build of the 40m direct conversion receiver that was conceived by the fine folks on the SolderSmoke blog and podcast. This is a fun project to make a simple [--] transistor receiver (for AM SSB and CW) for the [--] meter amateur radio band (7.0 to 7.3MHz). Included below are several links with more information on this project: Intro video to the DCR Challenge Project from SolderSmoke's YT channel: https://www.youtube.com/watchv=rLjxU2rMeXw There are detailed videos on each functional block of" [YouTube Link](https://youtube.com/watch?v=XmUsA62CSuA) 2025-06-01T17:09Z 226K followers, 18.6K engagements "#397: How to use cursors on Tektronix [----] series scopes including some "secret" features This video shows how to use the cursors on the Tektronix [----] series oscilloscopes such as the [----] [----] and [----]. Basic cursor functions for measuring voltage time and frequency are covered as well as the lesser known features to measure amplitude ratios duty cycle and phase. W2AEW Tek Tektronix oscilloscope scope tutorial how to cursors voltage time frequency ratio phase W2AEW Tek Tektronix oscilloscope scope tutorial how to cursors voltage time frequency ratio phase" [YouTube Link](https://youtube.com/watch?v=Gq1gNX2su2Q) 2025-03-08T22:53Z 226K followers, 10.5K engagements "#396: Demystifying Oscilloscope Triggering - what it does and how to use it This video discusses the basic function of triggering on both analog and digital oscilloscopes. It discusses what the end goal is the differences in the underlying operation of the triggering function in analog and digital scopes and how to setup a the most basic (and most common) trigger - a simple edge trigger. Links to other Oscilloscope Trigger video are listed below as well as a link to the PDF file of the notes from this video. Notes from this video: http://www.qsl.net/w2aew/youtube/DemystifyTriggering.pdf Basic" [YouTube Link](https://youtube.com/watch?v=N2novzfmVQ0) 2025-02-21T03:51Z 226K followers, 29.9K engagements "#395: Easy to make ground-radial kit for portable radio operations using ribbon cable This video shows the ground radial (counterpoise) kit that I make from ribbon cable for my portable vertical antenna deployments during Parks on the Air (POTA) and other temporary/portable radio operations. W2AEW Tek Tektronix POTA ground radial antenna vertical antenna magic carpet counterpoise W2AEW Tek Tektronix POTA ground radial antenna vertical antenna magic carpet counterpoise" [YouTube Link](https://youtube.com/watch?v=lEHup1Husrc) 2024-12-30T04:13Z 226K followers, 17.1K engagements "#394: Oscilloscope Best Practices - some of the most common issues and tips This video is a brief reminder of some of the most common considerations to optimize your measurements and signal / waveform fidelity with your oscilloscope. Each of the "tips" is briefly discussed. I have videos on many of these tips individually linked here: 10X probe tutorial: https://youtu.be/SX4HGNWBe5M Capacitive Loading of Probes: https://youtu.be/sPSJnj7gVJA 10X Probe Selection: https://youtu.be/2qLd_Y2EpNs Importance of Probe Compensation: https://youtu.be/oxJQr4dKnys Probe Ground Lead Length:" [YouTube Link](https://youtube.com/watch?v=AJYpiPGySEs) 2024-12-16T01:31Z 226K followers, 39K engagements "#393: Analysis of the RF characteristics of the Baofeng UV-5R Dual Band HT This video takes a quick look at the RF transmitter performance of the Baofeng UV-5R Dual Band transceiver. It takes a look at the RF harmonic emissions the transient key-up characteristics the CTCSS performance and a look at some unusual higher frequency FM content. W2AEW Tek Tektronix amateur radio HT Baofeng UV-5R harmonics PL tone CTCSS transceiver measurements W2AEW Tek Tektronix amateur radio HT Baofeng UV-5R harmonics PL tone CTCSS transceiver measurements" [YouTube Link](https://youtube.com/watch?v=CUSUEr6YGOw) 2024-10-10T01:57Z 226K followers, 18.4K engagements "#392: Schematic Basics: Multi-position switches in Simpson [---] VOM and Realistic DX-160 Receiver This video describes how to read and interpret the operation of multi-wafer multi-position switches that are commonly found in older electronics (before electronic switching of everything). Two different graphic representation of these switches are shown and described using the schematic for a Simpson [---] Model [--] VOM and a Realistic 5-Band Shortwave Receiver. w2aew Tek Tektronix Simpson [---] schematic realistic dx-160 switches wafer w2aew Tek Tektronix Simpson [---] schematic realistic dx-160" [YouTube Link](https://youtube.com/watch?v=0n05F2bVIzs) 2024-09-28T03:34Z 226K followers, [----] engagements "#391: POTA: First POTA activation with the CFT1 5-Band CW transceiver kit First Parks on the Air (POTA) activation using the new CFT1 5-band cw transceiver kit by KM4CFT. Band conditions were not great so it took about [--] minutes to get [--] contacts. You can get your own CFT1 here: https://hamgadgets.com/cft1-by-km4cft.html Build - Adjust - Align video here: https://youtu.be/vWbe1qQJ1Sk W2AEW Tek Tektronix POTA CW ham radio W2AEW Tek Tektronix POTA CW ham radio" [YouTube Link](https://youtube.com/watch?v=LDXjgZixEHg) 2024-09-17T01:30Z 226K followers, [----] engagements "#390 Kit Build: CFT1 5-band CW Field Transceiver - build / adjust / align / test (this is an update of video #389 which had an error in it) This video shows the process of building and adjusting/aligning the CFT1 5-band CW portable transceiver. It includes tips on assembly and soldering as well as details on winding toroids (optional pre-wound available) and the final adjustment/alignment process. Here are the "chapters" of this video: 00:00 Introduction to the CFT1 00:47 Kit components 02:03 Prep / de-burn the circuit boards 02:39 Axial inductor installation 03:27 Ceramic capacitor" [YouTube Link](https://youtube.com/watch?v=yWVh9Ojz-ak) 2024-09-16T20:31Z 226K followers, [----] engagements "#388: Build tune and test a trapped 20/30/40m End Fed Half Wave antenna This "part 2" video summarizes the build tune and test of a trapped EFHW antenna for the [--] [--] and 40m amateur radio bands. My previous video: https://youtu.be/KIEZmwB8AHwsi=yKC6pJmZ0JXx9kQe .shows the process of building and tuning the low power / QRP traps that I purchased in kit form from N7KOM. See additional links in the previous video for details. My resulting wire lengths were: UNUN to 20m trap: 30'-2.5" (about 9.21m) 20m to 30m trap: 4'-7.5" (about 1.41m) 30m trap to end: 8'-6" (about 2.59m) W2AEW Tek Tektronix" [YouTube Link](https://youtube.com/watch?v=qNqLWab7GaY) 2024-07-06T21:01Z 226K followers, 15.7K engagements "#387: How to build and tune traps for a multi-band End Fed Half Wave (EFHW) antenna This video shows how to build traps for a 40/30/20m EFHW antenna using a nice kit from N7KOM. We start with the intro into why I am doing this how to wind the toroids then how to setup and test the resonant frequency of the trap. Methods for adjusting the toroidal inductor are shown in order to move the resonant frequency to the desired point. An antenna analyzer like a RigExpert is used to test for resonance. I also how how a Dip Meter and Frequency Counter can be used to check the resonant frequency as well." [YouTube Link](https://youtube.com/watch?v=KIEZmwB8AHw) 2024-07-01T04:06Z 226K followers, 17.6K engagements "#386: Build the Iambic "pressure" paddle from VK3IL This short video presents the VK3IL Pressure Paddle - a lightweight portable paddle for your amateur radio's iambic keyer (for CW / Morse Code). This paddle is perfect for the portable POTA and SOTA operator as it is small and uses no moving parts. The author's blog page for this project can be found here: https://vk3il.net/pressure-paddle-v2/ The link to order the exact board I used here is: https://oshpark.com/shared_projects/ch6BPBtL Here's the link for the longer version of the board: https://oshpark.com/shared_projects/zdbRih8h The list" [YouTube Link](https://youtube.com/watch?v=RHPqF4rnkWI) 2024-06-01T02:35Z 226K followers, 11.4K engagements "#385: How to quickly tune the Penntek TR-45L Z-match tuner This short video shows how to quickly adjust the Z-match tuner in the Penntek TR-45L by slightly "overshooting" the null which each knob adjustment. Of course you want to finish up with the deepest null possible (little to now REV power deflection). This technique helps you get close to this point quickly - then finish up at the lowest possible REV power. W2AEW Tek Tektronix Penntek TR-45L Tr45L tuner z-match how to W2AEW Tek Tektronix Penntek TR-45L Tr45L tuner z-match how to" [YouTube Link](https://youtube.com/watch?v=hwewt1M5p4k) 2024-04-22T22:56Z 226K followers, [----] engagements "#384: What is the bandwidth of a CW / Morse code signal (as a function of speed and rise/fall time) The occupied bandwidth (OBW) of a CW / Morse code signal is primarily dependent upon the keying speed (Words per minute / WPM) and the rise/fall time of the RF envelope. Radios and operator practice give you control over the WPM but not many radios give you control over the RF rise and fall time (which can have a major effect). This video shows measurements of the Occupied BW at various keyer speeds and RF rise/fall times. Equipment used in this video include: Tektronix MSO44B oscilloscope:" [YouTube Link](https://youtube.com/watch?v=KEgrTwjWLf0) 2024-03-28T01:41Z 226K followers, 19.8K engagements "#383: Measuring AM Modulation Depth using an Analog Oscilloscope (followup from #382) This is a followup from video #382 where I demonstrate how to measure Am modulation depth using a digital oscilloscope. In this video we take a look at how to perform the measurement with an older analog scope (Tektronix 485). Additionally the measurements will be performed on low-cost RF signal generators. Here is a link to the previous video: https://youtu.be/-D-hkFkCH7Isi=zAfmYw0BeVA9Ar7G W2AEW Tek Tektronix oscilloscope scope how to tutorial AM modulation measurement analog trigger [---] W2AEW Tek" [YouTube Link](https://youtube.com/watch?v=zfYK1vU3JMY) 2024-03-06T01:50Z 226K followers, 15.7K engagements "#382: Measuring AM modulation depth/percentage with a digital oscilloscope This video shows how to measure the modulation index/percentage of an AM (amplitude modulated) RF carrier. The basics of the calculations are shown as well as techniques for setting up the scope to get a high quality waveform for the measurement. Notes for the video can be found here: http://www.qsl.net/w2aew/youtube/AMmeasurement.pdf Related videos: https://youtu.be/i29pI7okLe4si=0zx-4RscFinQ21rT https://youtu.be/0Kk_N_TpDeosi=i_Rqp7_pMLldRHbt W2AEW Tek Tektronix AM modulation measurement oscilloscope scope how-to" [YouTube Link](https://youtube.com/watch?v=-D-hkFkCH7I) 2024-03-02T04:24Z 226K followers, 22.8K engagements Limited data mode. Full metrics available with subscription: lunarcrush.com/pricing
@w2aew w2aew
w2aew posts on YouTube about tek, how to, tutorial, youtube the most. They currently have [-------] followers and [---] posts still getting attention that total [-----] engagements in the last [--] hours.
Engagements: [-----] #
- [--] Week [-----] -2.90%
- [--] Month [------] +3.80%
- [--] Months [-------] +26%
- [--] Year [-------] +100%
Mentions: [--] #
- [--] Month [--] -20%
- [--] Months [---] +21%
- [--] Year [---] +253%
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- [--] Week [-------] no change
- [--] Month [-------] +0.44%
- [--] Months [-------] +2.30%
- [--] Year [-------] +5.60%
CreatorRank: [---------] #
Social Influence
Social category influence technology brands social networks finance countries stocks
Social topic influence tek #1359, how to, tutorial, youtube, code, in the, kit, gain #1972, this is, build
Top accounts mentioned or mentioned by @hamradioduo @soldersmokevideos @philslab
Top assets mentioned Diodes Inc (DIOD)
Top Social Posts
Top posts by engagements in the last [--] hours
"#161: Circuit Fun: a simple RF detector / demodulator probe for DMM or scope This video describes a simple RF demodulator / detector probe that you can use with your DMM or oscilloscope to measure the relative amplitude of an RF signal in your circuit. It is very useful for tuning or adjusting IF stages during alignment filter responses peaking RF circuits and examining amplitude modulation characteristics. The video describes the circuit and its operation and demonstrates how to use it and the typical results you'll achieve. It uses a pair of 1N34A Germanium diodes but could also be built"
YouTube Link 2014-07-20T15:22Z 226K followers, 130.7K engagements
"#83: Basics of RF Mixers in Radio Receivers / Mixer Tutorial / Frequency Conversion This video describes the basic properties of RF mixers in the context of using them for frequency conversion/translation such in the application of a radio receiver. The input and output signals are shown on the oscilloscope and the spectrum of the output is also shown illustrating the various frequency components that are produced by the mixing process. The concept of IF filtering in a receiver is also illustrated. The video does not go into the design of mixers the different types of mixers or how to select"
YouTube Link 2013-03-09T04:26Z 226K followers, 191.2K engagements
"#312: Back to Basics: What is a VNA / Vector Network Analyzer This video presents the basic definition of a vector network analyzer (VNA) a practical view of how some of the measurements are performed and an introduction to some of the common measurements that are made. A few examples VNAs are shown. Knowledge of transmission lines reflections VSWR etc. is helpful but not required for this video. Here are several additional video links that may be helpful: Directional Coupler videos: https://www.youtube.com/watchv=iBK9ZIx9YaY https://www.youtube.com/watchv=byF1FLdbUiA Transmission lines"
YouTube Link 2020-06-06T04:06Z 226K followers, 204.7K engagements
"#403: Measuring a Directional Coupler with a SV4401A VNA This video shows the process of setting up calibrating and using a SV4401A Vector Network Analyzer to characterize the Return Loss (Reflection Coefficient) VSWR Mainline Loss (Transmission Coeff) Coupling Ratio and Directivity of a Mini-Circuit ZFDC-20-5+ directional coupler over a 100kHz to 2GHz frequency range. 00:00 Introduction 00:28 Review of Measurements of a Directional Coupler 02:14 Specifications of the Mini Circuit ZFDC-20-5+ 03:53 Setup VNA Frequency Range 04:17 Calibration Considerations 05:17 Calibration Process 07:00 Setup"
YouTube Link 2025-09-10T03:41Z 226K followers, [----] engagements
"#136: What is a dB dBm dBu dBc etc. on a Spectrum Analyzer This tutorial video gives the basics of the typical amplitude units used on a spectrum analyzer. It gives a basic description of the electronic definition of the decibel (dB) some of the properties of the dB why it is used. It describes that the dB is a relative measurement. These relative measurements can be expressed as absolute measurements when a known reference is used/implied. This is where the terms dBm dBu dBmv etc. come from. Finally the term dBc is described. Each of the descriptions is followed with practical examples and"
YouTube Link 2014-03-23T06:17Z 226K followers, 397K engagements
"#37: Use a scope to measure the length and impedance of coax This video shows one way to use a scope and function generator to measure the length of a piece of coax transmission line as well as estimate its impedance. It uses a "poor man's TDR" type of measurement by launching a pulse into the coax and measuring how long it takes to return after being reflected by the open circuit end. This same technique can be used to determine the distance to a fault (open or short). A simple method for determining the impedance of the line is also shown. This video touches briefly on transmission line and"
YouTube Link 2012-03-09T04:31Z 226K followers, 238.6K engagements
"#366: Back to Basics: Basics of the Bipolar Transistor - NPN and PNP NOTE: The horizontal axis of the characteristic curve plot were mislabeled as Vbe instead of Vce in one or two spots. The downloadable video notes have been corrected. This is a back-to-basics tutorial video on the bipolar junction transistor or BJT. While there are just two basic types (NPN and PNP) the video mainly discusses NPN types. It reviews the schematic symbol typical pinouts & basic operating principles of linear and switch operation. We dip our toe into the physics a little bit and then do some experiments on the"
YouTube Link 2023-03-11T05:05Z 226K followers, 47.4K engagements
"#167: How a Diode Ring Mixer works Mixer operation theory and measurement This video describes how a classic double-balanced diode-ring mixer operates. Very basic mixer theory is quickly reviewed which describes how the sum and difference of the LO (local oscillator) and RF (Radio Frequency) inputs are generated at the IF (intermediate frequency) output. It is also noted that the sum and differences of the harmonics of the LO and RF are also present at the IF output. Math waveforms on the oscilloscope are used to illustrate the operation of the mixer and the actual waveforms from the mixer"
YouTube Link 2014-08-13T23:45Z 226K followers, 176.2K engagements
"#401: Tool Time: What is a Wiggy Ans: A Solenoid-type Voltage Tester Taking a bit of a departure from electronics - this video introduces a tool that is very popular with electricians - the Wiggy a solenoid-type AC/DC voltage tester with some very interesting features and characteristics. W2AEW Tek Tektronix Square D Wiggy AC DC voltage tester W2AEW Tek Tektronix Square D Wiggy AC DC voltage tester"
YouTube Link 2025-07-13T02:41Z 226K followers, 12.2K engagements
"#379: How to measure coax loss using a NanoVNA This video shows how to setup your NanoVNA to measure coax loss using an S21 measurement on a VNA. I show the setup and calibration process as well as some actual measurements of a few lengths of RG-174 and RG-316 coax that I use for my portable (POTA) HF operating. More info on the custom NanoVNA stand here: https://forums.qrz.com/index.phpthreads/3d-printed-stand-for-nanovna-h4-w-small-tray-your-call-sign.861698/ 00:00 Introduction 00:18 Credit and Inspiration for the video 00:54 Coax samples to be measured 01:24 Hardware setup for calibration"
YouTube Link 2023-12-23T22:56Z 226K followers, 47.6K engagements
"#9: Basic 1X and 10X Oscilloscope Probe tutorial This video discusses what 1X and 10X probes are and how using 1X and 10X passive probes to connect your oscilloscope to your circuit will affect the circuit and the frequency response. It discusses why 1X or 10X probes are used and how to properly compensate 10X probes. PDF of video notes can be found here: http://www.qsl.net/w/w2aew//youtube/1x_10x_scope_probe_basics.pdf W2AEW Oscilloscope Tektronix 10X probe compensation capacitance W2AEW Oscilloscope Tektronix 10X probe compensation capacitance"
YouTube Link 2011-06-07T01:48Z 226K followers, 247.2K engagements
"#369: How to install a crimp-on BNC connector to RG-316 RG-174 etc. coax This video shows how to install a crimp-on style BNC connector onto RG-316 coaxial cable or other 0.100" OD coax such as RG-174 RG-188 Belden [-----] [-----] [-----] etc. The connectors used here were purchased from Max-Gain Systems in Marietta GA (no sponsorship or other relationship to W2AEW). I found their prices to be good and quality of the connectors appears to be very good. Their website is: http://www.mgs4u.com The particular connector used in the video is their p/n: 7005-BNC-174 W2AEW Tek Tektronix BNC repair"
YouTube Link 2023-06-21T03:25Z 226K followers, 55.1K engagements
"#230: How to install a BNC connector on RG-58 coax DIY Repair This short video shows how to install a crimp style BNC connector onto RG-58 [--] ohm coax. Installation of other crimp style coaxial connectors will be similar. Note that the connectors are specific to the type of coax being used and having the correct crimping tool is really a necessity. You can optionally (carefully) solder the center pin and optionally finish up with some heat shrink tubing for clean professional look. W2AEW Tek Tektronix coax coaxial coaxial cable BNC BNC connector [--] ohm coax crimp crimper jumper cable repair"
YouTube Link 2016-02-06T15:46Z 226K followers, 797.7K engagements
"#314: How to use the NanoVNA to sweep / measure an antenna system's SWR and optimize its tuning This video briefly shows how to setup and use the NanoVNA to sweep an antenna system (antenna transmission line transmatch etc.) to measure its VSWR Reflection Coefficient etc. and then shows how you can use it to monitor the tuning behavior as you make adjustments. The basic steps include: - Setting the traces that you want to display (SWR Smith S11) - Setting the frequency range - Running a Calibration - Making the sweep - Using Markers Please see my previous videos on the VNA Smith Chart"
YouTube Link 2020-06-21T04:30Z 226K followers, 414.6K engagements
"#111: How to make a high performance oscilloscope probe socket This short video shows a simple way to make a very high performance socket to connect your oscilloscope probe to your circuit. It features very low ground inductance which minimizes distortion thus preserving signal integrity. In a previous video: http://www.youtube.com/watchv=zodpCuxwn_o I showed the effects of ground inductance on the measured waveform quality. This socket design minimizes ground inductance so that signal integrity is preserved even a high frequencies. This method can be adapted to different probe styles and"
YouTube Link 2013-09-18T02:20Z 220K followers, 45.6K engagements
"#350: Adding AGC (automatic gain control) to my QCX+ CW Transceiver kit Bench project - adding an AGC function to the QRP-Labs QCX CW Transceiver. We take a look at the QCX circuit to see where the AGC will be applied and review the AGC circuit itself. We take a listen to the receiver without the AGC installed and then again after it is installed. For more information see the links below: QRP-Labs website - great amateur radio kits including QCX: https://www.qrp-labs.com/ Here are a few of the QCX kits available: https://www.qrp-labs.com/qcxp.html https://www.qrp-labs.com/qcxmini.html .and"
YouTube Link 2022-03-10T04:54Z 208K followers, 18.9K engagements
"#392: Schematic Basics: Multi-position switches in Simpson [---] VOM and Realistic DX-160 Receiver This video describes how to read and interpret the operation of multi-wafer multi-position switches that are commonly found in older electronics (before electronic switching of everything). Two different graphic representation of these switches are shown and described using the schematic for a Simpson [---] Model [--] VOM and a Realistic 5-Band Shortwave Receiver. w2aew Tek Tektronix Simpson [---] schematic realistic dx-160 switches wafer w2aew Tek Tektronix Simpson [---] schematic realistic dx-160"
YouTube Link 2024-09-28T03:34Z 226K followers, [----] engagements
"#288: Comparing XY Mode on Analog and Digital Oscilloscopes This video compares the difference in performance of the XY mode of analog CRT based oscilloscopes vs. digital scopes. The circuit being used to generate the X and Y waveforms is a fun little board made by VintageTEK and is available on ebay: Note that the stock of this board sold out very quickly. VintageTek has responded by building a new batch of boards As a bonus these new boards include a 2nd function - a table-tennis game very similar to one of the original TV video games. Here is the link to the NEW and IMPROVED board:"
YouTube Link 2018-08-05T13:43Z 215K followers, 46.9K engagements
"#228: Radio Fun: Michigan Mighty Mite CW transmitter and a low pass filter The Michigan Mighty Mite is a very simple crystal controlled CW transmitter that uses very few parts is easy to build and a fun little ham radio project. Simplicity comes at a price and that price is harmonic distortion. A low pass filter is shown that helps to dramatically reduce the distortion. This Mite is built with a 3.579MHz "color burst" crystal. Inspiration for building the Mighty Mite came from the Soldersmoke blog and podcast. More information can be found at the following links: Lots of pages on the Michigan"
YouTube Link 2016-01-27T14:44Z 220K followers, 114.1K engagements
"#72: Simple Station Monitor for Ham Radio using an Oscilloscope This short video shows a very simple way to hook up an oscilloscope to use it as an RF Signal Monitor to observe the RF envelope from your ham radio transmitter. It shows how you can use the stray RF coupling that exists between the RF path inside of your tuner to one of the unused ports in the tuner as a simple no-cost RF sampler to couple the signal into your oscilloscope. BE ABSOLUTELY SURE that you do NOT transmit directly into your oscilloscope - that is a sure way to DAMAGE your scope"
YouTube Link 2012-12-28T19:12Z 222K followers, 125.1K engagements
"#80: MFJ Cub 40m QRP CW Transceiver circuit walk-thru and review plus bandsweep ham radio MFJ-9340 I assembled this MFJ-9340 Cub QRP CW transceiver for 40m for my friend Gerry - N2GJ. It's a very pleasant kit to build. All surface mount components are already mounted on the board. Assembly involves soldering the through hole components and winding two toroidal coils. For me the assembly took one evening and the alignment took another evening. The video goes through the block diagram of the transceiver then walks through the schematic describing the function of each circuit. The transceiver"
YouTube Link 2013-02-17T22:50Z 216K followers, 37.7K engagements
"#236: Using a Current Shunt with a Panel Meter / Ammeter scale change This video gives you the basics of how to calculate and use a simple resistive current shunt with an analog panel meter to change the current that is needed for a full scale deflection. The notes page for this video can be found here: http://www.qsl.net/w2aew/youtube/CurrentShunt.pdf"
YouTube Link 2016-04-25T14:32Z 196K followers, 38.2K engagements
"#22: Spectrum Analyzer Basics / Tutorial and the Tektronix 1401A I picked up a Tek 1401A Spectrum Analyzer at a hamfest recently and it inspired me to do a video or two. This one presents a generic block diagram and tutorial of what a conventional swept spectrum analyzer is and how it works. It also shows a quick demo of the Tektronix 1401A Spectrum Analyzer Module from the mid-70's. Video Notes Page: http://www.qsl.net/w2aew/youtube/Basics_of_Spectrum_Analyzers.pdf"
YouTube Link 2011-10-23T15:54Z 218K followers, 98.3K engagements
"#42: Composite Video on an Analog Oscilloscope using XYZ - Lab tour. One more video playing with the Z-axis input on an analog oscilloscope. This time I turn the scope into a composite video monitor by creating X and Y sawtooth ramp signals from the vertical and horizontal sync pulses. For this hack I use an LM1881 Composite Video Sync separator to easily extract the sync pulses from the composite video then a couple of transistors to create the sawtooth waveforms and finally a simply inverting amplifier to invert the video signal so that the resulting image on the scope is not a negative"
YouTube Link 2012-05-03T04:02Z 210K followers, 100K engagements
"#164: More XY Oscilloscope graphics VintageTEK and how projects evolve It is sometimes very interesting how projects evolve - one leading to another and so on. This video presents a nice example of this and talks a little about a great organization - VintageTEK. Lots of links to follow. The first project in the series showed how to draw XY graphics on an oscilloscope using an Arduino: https://www.youtube.com/watchv=Dx9N91FnPdo That lead to building an R2R ladder DAC to make the graphic drawing repeat much faster (eliminating flicker): https://www.youtube.com/watchv=AulX1OM7RwE These migrated"
YouTube Link 2023-10-21T11:01Z 199K followers, 13.5K engagements
"#300: Ham Basics: Sending Morse Code / CW - straight key paddles and iambic keying This video talks about the basic timing of CW / Morse code elements (dits and dahs) and how to send them using a few device - such as a traditional straight key as well as using a dual-lever paddle with an electronic keyer. Iambic keying with a paddles is also described and demonstrated. Notes from the video: http://www.qsl.net/w2aew/youtube/Morse_Code_Timing.pdf"
YouTube Link 2019-05-04T23:20Z 218K followers, 466.8K engagements
"#200: T/R Switch w/ PIN Diodes and Lumped Element Quarter-wavelength transmission line This video describes and demonstrates a simple single-band low-power electronic transmit / receive switch using PIN diodes an a quarter-wavelength RF transmission line. A lumped element equivalent of the 1/4 wavelength line is discussed and built into a PIN diode based T/R switch and the operation is demonstrated on the oscilloscope. This video builds upon a few prior videos listed here: #118: Basics of PIN Diodes: https://www.youtube.com/watchv=XpYsCM_Wf50 #82: Using Diodes as Switches:"
YouTube Link 2015-04-19T00:54Z 210K followers, 32.2K engagements
"#91: Basic RF Attenuators - Design Construction Testing - PI and T style - A Tutorial This video describes the design construction and testing of a basic RF attenuator. The popular PI and T style attenuators are discussed. An example of a 20dB or 10X PI attenuator is designed and constructed and then tested using a spectrum analyzer with tracking generator. The construction technique shown minimized parasitic inductance of the components thus increasing the usable bandwidth of the attenuator. A copy of the notes in the video can be found here:"
YouTube Link 2013-05-12T04:24Z 216K followers, 173K engagements
"#76: Debug Transient EMI signal with a Mixed Domain Oscilloscope MDO4000 Tektronix This is a re-do of a video I did over a year ago using a fixed camera position and adding a few more details (no shaky-cam). It shows the use of a Tektronix MDO4000 series Mixed Domain Oscilloscope to track down the source of a transient RF / EMI signal through the use of RF triggering and multiple time-correlated traces to characterize the repetitive nature of the transient signal and identify a potential cause for this transient emission"
YouTube Link 2013-01-31T20:24Z 220K followers, 14.8K engagements
"#362: Ham Radio: My Elecraft KX2 portable QRP shack kit for Parks On The Air (POTA) SOTA and more This video shows my Elecraft KX2 "shack in a pack" kit for QRP portable operations such as Parks On The Air (POTA) Summits On The Air (SOTA) and other portable operating activities. Some of the items included in this kit are: The Elecraft KX2: https://elecraft.com/products/kx2-ssb-cw-data-80-10-m-transceiver The Spark Plug Gear 49:1 UNUN Transformer: https://www.sparkpluggear.com/shop/p/sparkplug The BaMaKeY TP-III Paddles:"
YouTube Link 2022-11-20T17:11Z 226K followers, 11.6K engagements
"#23: Tektronix 1401A Spectrum Analyzer quick demo This short video shows a cool feature of the Tektronix 1401A Spectrum Analyzer Module that helped users find signal frequencies through a unique "marker" function. This function was the way to "mark" a particular frequency for further analysis or measurements before the advent of more fully integrated spectrum analyzers with multiple markers were developed"
YouTube Link 2011-10-23T16:03Z 215K followers, 10.7K engagements
"#381: Circuit Fun Followup: Trimming out distortion on Twin-Tee Oscillator - FFT &THD measurement This is a followup to the previous video on the Twin-Tee oscillator: https://youtu.be/KFVVozlXoOksi=WV0abgPCMmj5OQxJ .showing what happens in the FFT and the THD measurement as the trimmer is adjusted in the Twin-Tee network (by request). W2AEW Tek Tektronix twin-tee oscillator op amp distortion THD FFT tutorial W2AEW Tek Tektronix twin-tee oscillator op amp distortion THD FFT tutorial"
YouTube Link 2024-02-19T02:43Z 226K followers, 17K engagements
"#202: Basics of using FFT on a Tektronix TDS2000 oscilloscope This video (by request) gives an overview of how to the FFT Math function on the Tektronix TDS2000 series oscilloscope. (same applies to the TDS1000). A brief review of FFT fundamentals is given followed by a demonstration of using the FFT function and controls ending with a description of the mathematical relationships between the scope settings and the FFT results. More modern scopes will have different (easier to use) controls for the FFT than this 12+ yr old scope but it is instructive to understand the operation of this"
YouTube Link 2015-05-23T01:57Z 216K followers, 61.2K engagements
"#77: Op Amp Peak Detector Tutorial with peak detector basics This video introduces a simple peak detector circuit illustrates some of its limitations and then discusses how an op amp can improve on the circuit using negative feedback"
YouTube Link 2013-02-02T05:07Z 215K followers, 76.9K engagements
"#149: How to solder a leadless ceramic surface mount package LCC CLCC Just a short video to show how I hand solder a ceramic leadless chip carrier (CLCC) package to a circuit board in this case a Si570. Typical surface mount soldering techniques including the use of flux fine gauge solder and a fine tipped iron"
YouTube Link 2014-05-24T16:41Z 221K followers, 26.5K engagements
"#260: RF Diode Mixer LO Drive Level & Conversion Loss 1dB Compression Distortion When selecting a diode mixer for RF applications one of the most important selection criteria is the Level of the mixer - which is the LO Drive level. This video describes the LO drive level and how it affects the commutation of the diodes and the mixer performance parameters such as Conversion Loss 1dB Compression level IP3 distortion etc. The mixer used in this video is a Mini-Circuits ADE-1ASK: https://www.minicircuits.com/pdfs/ADE-1ASK.pdf For more background on how diode ring mixers work see this video:"
YouTube Link 2017-05-26T23:52Z 215K followers, 32.5K engagements
"#49: Simple Component Tester using Oscilloscope - Octopus Curve Tracer This video shows an example of performing a simple component test (curve tracer) on an oscilloscope. The simple circuit shown is often called an Octopus (I don't know why) and it's been around for decades in many variants. You can Google search on Octopus component tester oscilloscope curve tracer etc. and find dozens and dozens of variants. In the video I boil the circuit down to its simplest implementation describe how it works and demonstrate how you use it"
YouTube Link 2012-06-09T04:34Z 216K followers, 383K engagements
"#245: Old Tech: The Wadley Loop Superhet Receiver - Yaesu FRG-7 Example The Yaesu FRG-7 general coverage HF communications receiver utilized an interesting superheterodyne architecture called the Wadley Loop. It is a drift cancelling circuit that dramatically improves the frequency stability of the receiver by compensating for or more accurately cancelling out the drift of the 1st local oscillator (LO). This video takes a look at how the Wadley Loop works and shows some example signals from within the FRG-7 unit. Notes from this video: http://www.qsl.net/w2aew/youtube/WadleyLoop.pdf"
YouTube Link 2016-09-27T00:03Z 216K followers, 34.6K engagements
"#75: Basics of Opamp circuits - a tutorial on how to understand most opamp circuits This tutorial discusses some general rules of thumb that make it easy to understand and analyze the operation of most opamp circuits. It presents some ideal properties of opamps and discusses how negative feedback generally causes the input voltage difference to be equal to zero (input voltages are made equal by the action of negative feedback). In other words the output will do whatever it can to make the input voltages equal. Applying this simple fact makes it easy to analyze most opamp circuits. A copy of"
YouTube Link 2013-01-27T05:19Z 221K followers, 781.4K engagements
"#345: Generating AM and DSB-SC with a Double-Balanced Diode Ring Mixer / Modulator This video answers the viewer question I received about how to generate AM (Amplitude Modulation) using a double-balanced diode ring mixer - in other words how to use it as an AM Modulator. The question arose from three other videos: Basics of Diode Ring Mixers: https://youtu.be/junuEwmQVQ8 Basics of the Gilbert Cell: https://youtu.be/7nmmb0pqTU0 Generating DSB-SC and AM with a Gilbert Cell: https://youtu.be/38OQub2Vi2Q Video Notes: http://www.qsl.net/w2aew/youtube/DSB-SC_AM_DBMixer.pdf"
YouTube Link 2021-12-29T03:56Z 211K followers, 29.8K engagements
"#380: Circuit Fun: Twin-Tee Oscillator - low distortion op amp sine waves This circuit fun video presents the Twin-Tee op amp oscillator - a fun circuit that can make low distortion (low THD) sine waves with simple resistors and capacitors no inductors. It is a circuit you don't see written up too much. Here is a link to the Texas Instruments article shown in the video: http://www.ti.com/lit/pdf/slyt164 More appnotes on sine wave oscillators. https://www.ti.com/lit/SLOA060 https://www.ti.com/lit/an/snoa665c/snoa665c.pdf My show notes: http://www.qsl.net/w2aew/youtube/twintee_oscillator.pdf"
YouTube Link 2024-02-17T04:01Z 226K followers, 55.9K engagements
"#391: POTA: First POTA activation with the CFT1 5-Band CW transceiver kit First Parks on the Air (POTA) activation using the new CFT1 5-band cw transceiver kit by KM4CFT. Band conditions were not great so it took about [--] minutes to get [--] contacts. You can get your own CFT1 here: https://hamgadgets.com/cft1-by-km4cft.html Build - Adjust - Align video here: https://youtu.be/vWbe1qQJ1Sk W2AEW Tek Tektronix POTA CW ham radio W2AEW Tek Tektronix POTA CW ham radio"
YouTube Link 2024-09-17T01:30Z 226K followers, [----] engagements
"#70: Digital Oscilloscope Bandwidth Measurement - direct and using risetime This is a followup video to my last one which discussed the basics of oscilloscope bandwidth. This video answers a viewer question about digital scope BW and usability above the rated bandwidth as well as making the 3dB bandwidth measurement two ways - directly and through a risetime measurement. In each case one has to be careful that the signal source is "known" to be flat over the frequency range of interest or that the risetime of the test signal is either known or significantly faster than the risetime of the"
YouTube Link 2012-12-16T22:42Z 218K followers, 35.9K engagements
"#367: Characterizing the key-up frequency transient on an Alinco DR-135 Mk III 2m radio with an RSA A fellow ham reported some transient interference coming from a local digipeater that was using the Alinco DR-135 2m FM transceivers. He found that they had a significant frequency instability at key-up and asked me to verify and document this in a video. This video takes a look at two different DR-135 rigs. I also take a look at an older Kenwood TM-231A and an Icom rig for comparison. It is clear from this video that the Alincos definitely have a serious frequency instability upon key up of"
YouTube Link 2023-04-09T05:55Z 226K followers, 11.6K engagements
"#308: Back to Basics: Diodes - guide to operation characteristics types and specifications This video is a Practical Guide to Diodes - their basic operation IV curves typical characteristics various diode types and common diode specifications. Links to many of my previous videos involving diodes are mentioned so these links are included below: Reverse Recovery Time: https://youtu.be/SBqLOrlA7QI Diodes as Switches: https://youtu.be/YBNIq_d56sA Zener Diode Basics: https://youtu.be/jfstUsnCmao Basics of PIN Diodes: https://youtu.be/XpYsCM_Wf50 PIN Diode T/R Switch: https://youtu.be/A1BAq0KxIdc"
YouTube Link 2019-11-04T05:19Z 220K followers, 39.2K engagements
"#204: Basics of Tunnel Diodes and their applications Tunnel diodes are a bit rare these days but still have uses in special applications including extremely high frequency oscillators etc. They were commonly used in microwave circuits oscilloscope trigger circuits and other applications. This video reviews the basics of tunnel diodes including the basic properties and simple applications. I refer to these as the "bucking bronco" of diodes because of the IV curve that jumps around and the fact that these diode will jump into wild oscillation if you just look at them funny There is a lot of"
YouTube Link 2015-06-23T15:20Z 220K followers, 104.3K engagements
"#262: IQ Modulator Basics: Operation measurements impairments This video discusses the basics of an IQ modulator discusses and demonstrates its operation shows a few typical modulation types as well as the effects of various impairments. It also shows the basic SSB Suppression test. I use a combination of a few Mini-Circuits mixers (ADE-1ASK) for much of the video and also show one of their IQ Modulator modules (ZFMIQ-10M). As mentioned in the video there are a few pre-requisite videos that are recommended to watch prior to this video: Basics of IQ Signals:"
YouTube Link 2017-06-22T21:46Z 221K followers, 99.8K engagements
"#201: Basics of Reverse Recovery Time in a Diode This video covers the basics of what the reverse recovery period is in a diode some of the parameters that affect the reverse recovery time and a simple measurement setup to observe the reverse recovery characteristic. Other related videos are: A PIN Diode based T/R switch: https://www.youtube.com/watchv=A1BAq0KxIdc Basics of PIN Diodes and RF switching: https://www.youtube.com/watchv=XpYsCM_Wf50 Basics of using diodes as switches: https://www.youtube.com/watchv=YBNIq_d56sA Notes page: http://www.qsl.net/w2aew/youtube/reverserecovery.pdf"
YouTube Link 2015-05-02T02:26Z 220K followers, 65.8K engagements
"#215: Basics of crossover distortion LM358 op amp example This video discusses the basics of crossover distortion. It discusses one very common cause for crossover distortion using the LM358 op amp as an example. The circuit schematic of the LM358 is examined to determine the cause of the distortion and then a simple method for eliminating the distortion is demonstrated. Show notes can be found here: http://www.qsl.net/w2aew/youtube/crossoverdistortion.pdf LM358 Datasheet: http://www.ti.com/lit/ds/symlink/lm158-n.pdf"
YouTube Link 2015-10-03T03:49Z 217K followers, 48.5K engagements
"#125: Tektronix MDO4000B Enhancements - RF specs Signal Analysis and WLAN WiFi Example This video presents the performance and feature enhancements included in the "B" version of the Tektronix MDO4000B series Mixed Domain Oscilloscope. For an introduction to the MDO please see this video: http://www.youtube.com/watchv=x1oe45DP1_4 The B version includes performance enhancements on the Spectrum Analyzer as well as a live-link to a comprehensive vector signal analysis software package called SignalVu-PC. This is the same analysis that is native to the Tektronix RSA Realtime Spectrum/Signal"
YouTube Link 2014-01-11T03:31Z 218K followers, 16.7K engagements
"#399: Review: 3D-printed Straight-key with a great story - by the HamRadioDuo This 3D printed straight-key by Mike (N4FFF) and Becky (N4BKY) inspired by the J-38 has a great story and mission behind it - take a look at the video. For more information see the links below: Where to get the key: https://shop.hamradioduo.com/ HamRadioDuo Youtube channel: https://www.youtube.com/@HamRadioDuo Their tools page on website: https://www.hamradioduo.com/tools/ The main HamRadioDuo webpage: https://www.hamradioduo.com W2AEW Tek Tektronix ham radio morse code straight key W2AEW Tek Tektronix ham radio"
YouTube Link 2025-06-13T13:40Z 226K followers, [----] engagements
"#290: Vintage Tech: Tektronix [---] Curve Tracer This video presents the basics of what a curve tracer is then takes a brief look at the venerable Tektronix [---] Curve Tracer - inside and out. We then finish up by tracing some curves for a diode BJT JFET and a "mystery" device. Notes: http://www.dorkage.com/youtube/Curve_Tracer.pdf Some earlier videos on curve tracing: Octopus: https://www.youtube.com/watchv=Gwo3pEH7hUE Basic curve tracer with function generator and scope: https://www.youtube.com/watchv=WWY-pakm_OM Three terminal curve tracer based on a step generator circuit:"
YouTube Link 2018-08-22T02:29Z 216K followers, 32.1K engagements
"#368: Overview of the Peak Atlas DCA Pro Model DCA75 Semiconductor Component Analyzer & Curve Tracer This is a brief overview of the Peak Atlas DCA Pro semiconductor component analyzer the model DCA75 from Peak Electronics. Some brief comparisons to the inexpensive multi-function testers available today as well as a large full-blown curve tracer as we take a look at the basic and advanced features of this great little tester. The unit shown in this video is an older version of this: https://www.peakelec.co.uk/acatalog/dca75-dca-pro-semiconductor-analyser.html Amazon link:"
YouTube Link 2023-05-18T15:47Z 226K followers, 38.2K engagements
"#274: Smith Chart Basics: Impedance and Admittance curves and conversion This introductory video describes how complex impedance and admittance are represented on the Smith Chart and how to convert between them. A VNA is used to illustrate the complex impedance representation on a live smith chart with variable resistive and reactive components. Notes can be found here: http://www.qsl.net/w2aew/youtube/Smith_Chart_Basics-Impedance_and_Admittance.pdf Check out my friend Mike's awesome iPhone/iPad app that automates these Smith Chart and Impedance conversions and the associated introductory"
YouTube Link 2017-12-31T04:41Z 216K followers, 85.8K engagements
"#371: Ham Radio Quick Tip: Tuning aid for Adjustable Coil vertical like the MP1 and others Here's a quick tip showing a homemade adjustment gauge for an adjustable coil vertical like the SuperAntenna MP1 shown which is one of the antennas I carry for POTA activations. The same type of gauge can be made for antennas such as the Wolf River Coil and others. Of course this assumes that you've already measured and documented the coil tap positions for the bands you choose to operate on. The coil shown in the video is part of this antenna: http://newsuperantenna.com/Super-Antenna-MP1/ W2AEW Tek"
YouTube Link 2023-07-24T20:56Z 226K followers, [----] engagements
"#55: Back to Basics: Tutorial on LC Resonant Circuits This video builds upon the voltage / current phase relationships that were demonstrated in the previous video: http://www.youtube.com/watchv=ykgmKOVkyW0 to show how these lead/lag relationships give rise to the unique properties of series and parallel resonant LC circuits. The voltage and current waveform phases are examined and it is shown how these waveforms combine at resonance. The result of this paper analysis is also shown live on the oscilloscope. These simple circuits can be used to create frequency selective networks which are"
YouTube Link 2012-07-24T03:11Z 221K followers, 209.4K engagements
"#145: Unboxing the Tektronix MDO3000 Oscilloscope A short video sharing the excitement of unboxing a new Tektronix MDO3000 Mixed Domain Oscilloscope"
YouTube Link 2014-05-08T03:35Z 218K followers, 17K engagements
"#147: Basics of Varactor Diodes Voltage Controlled Oscillator VCO Example This tutorial presents the basics of the varactor diode or varicap diode and describes how it functions as a voltage controlled capacitor. A test fixture is shown and used to measure the capacitance vs. reverse voltage. Finally a voltage-controlled oscillator circuit is built and measured showing how the voltage on the varactor diode is used to tune the frequency of the VCO. Notes from the video are here: http://www.qsl.net/w/w2aew//youtube/Varactor_diodes_with_VCO_example.pdf"
YouTube Link 2014-05-11T11:59Z 216K followers, 68.8K engagements
"#138: How to Measure Output Impedance This video shows a few methods for measuring the output impedance or resistance of a function generator amplifier or other circuits. These methods generally apply to relatively low frequency use cases and won't necessarily apply to all circuit types. The methods shown are all variations on measuring the response of the circuit to different load impedances and calculating the device or circuit's output impedance from those readings. A low frequency sinusoid (sinewave) is used as a test signal to prevent problems from reflections on misterminated"
YouTube Link 2014-04-06T18:58Z 220K followers, 245.7K engagements
"#395: Easy to make ground-radial kit for portable radio operations using ribbon cable This video shows the ground radial (counterpoise) kit that I make from ribbon cable for my portable vertical antenna deployments during Parks on the Air (POTA) and other temporary/portable radio operations. W2AEW Tek Tektronix POTA ground radial antenna vertical antenna magic carpet counterpoise W2AEW Tek Tektronix POTA ground radial antenna vertical antenna magic carpet counterpoise"
YouTube Link 2024-12-30T04:13Z 226K followers, 17.1K engagements
"#341: Ham tip: Safely using a coax switch to connect multiple rigs to a single antenna system This video answers the question - "Can an antenna switch be used in reverse to switch multiple radios into a single antenna system and is it safe" The answer is - YES in most cases - as long as the switch grounds the unused inputs which is usually the case. The video takes a look at the numbers describes how much isolation is needed and then shows how to measure the isolation using a NanoVNA and finally shows the results using a couple of HF radios. Notes from this video are here:"
YouTube Link 2021-10-31T01:43Z 210K followers, 56K engagements
"#121: Basics of SCRs and some circuit fun - device and circuit tutorial The basics of Silicon Controlled Rectifiers (SCRs) is presented. The inspiration was a circuit query on the EEVBlog Forum: http://www.eevblog.com/forum/beginners/simple-exponential-decay-generator/ SCRs are part of a class of semiconductors called Thyristors - a group which consists of devices like SCRs TRIAC DIACs etc. They're typically used in power control applications but can be used for other purposes too. This video presents the basic operation of an SCR and a simple little circuit that exploits its properties. A"
YouTube Link 2013-12-15T04:07Z 222K followers, 43.3K engagements
"#233: Back to Basics: How to use the [--] terminals of a lab power supply split supply A short "back to basics" video on why there are three terminals on a lab power supply (+ - and GND) and the various ways they can be connected. I often get asked about how to setup a split supply for an op amp circuit - so that was the reason for putting this short video together"
YouTube Link 2016-03-08T03:44Z 216K followers, 63.6K engagements
"#263: Using a VNA to sweep an RF Dummy Load Tektronix TTR506A Vector Network Analyzer This short video shows how to use a Vector Network Analyzer (VNA) to sweep a dummy load to determine its usable frequency range. In this case I test a Bird Termaline and an inexpensive ParaDynamics load. Setup calibration and test are shown. The Return Loss S11 and the SWR are shown. The analyzer used is the Tektronix TTR506A: http://www.tek.com/vna/ttr500"
YouTube Link 2017-07-11T21:46Z 216K followers, 24.7K engagements
"#242: How to use an oscilloscope. Plus seeing signals in antique radios NJARC This is a recording of a presentation I gave to the NJ Antique Radio Club on [--] July [----] at Bowen Hall Princeton University. It covers the basic controls and operation of an analog oscilloscope (the first [--] minutes or so) and then how you would setup the scope to measuring the signals in various locations in a typical antique AM radio (staring about [--] minutes in). We used a "trainer" radio which is a classic All American Five type design but spread out on a large board making it easy to see the components and"
YouTube Link 2016-07-09T15:36Z 212K followers, 120.4K engagements
"#14: Tektronix MDO4000 Spectrum Analyzer quick comparison to entry level analyzer This video takes a very brief look at the basic noise floor and sweep speed performance of the spectrum analyzer portion of the new Tektronix MDO4000 Mixed Domain Oscilloscope to a basic entry level swept spectrum analyzer. Both analyzers are set to the same set of settings and the sweep speed / spectrum update rate are compared. The integrated spectrum analyzer in the MDO is intended to be comparable to the performance of conventional entry level class spectrum analyzers similar to the Agilent ESA-L E4411B that"
YouTube Link 2011-09-06T01:07Z 220K followers, [----] engagements
"#131: How to test transistors - NPN and PNP bipolar junction transistors BJTs A back to basics video showing several ways to test BJTs or bipolar junction transistors. The example shown is an NPN transistor. To test a PNP transistor simply reverse the leads of the meter. The use of an analog meter / VOM (Simpson 260) as well as a Fluke digital multimeter DMM is shown as well as a couple of Heathkit transistor checker/testers"
YouTube Link 2014-02-22T04:45Z 210K followers, 144.8K engagements
"#388: Build tune and test a trapped 20/30/40m End Fed Half Wave antenna This "part 2" video summarizes the build tune and test of a trapped EFHW antenna for the [--] [--] and 40m amateur radio bands. My previous video: https://youtu.be/KIEZmwB8AHwsi=yKC6pJmZ0JXx9kQe .shows the process of building and tuning the low power / QRP traps that I purchased in kit form from N7KOM. See additional links in the previous video for details. My resulting wire lengths were: UNUN to 20m trap: 30'-2.5" (about 9.21m) 20m to 30m trap: 4'-7.5" (about 1.41m) 30m trap to end: 8'-6" (about 2.59m) W2AEW Tek Tektronix"
YouTube Link 2024-07-06T21:01Z 226K followers, 15.7K engagements
"#305: Measuring Total Harmonic Distortion THD using an FFT on an oscilloscope This video shows how to use the FFT function on an oscilloscope to measure the relative amplitude of the harmonic distortion components of a signal and then take those results and compute the THD or Total Harmonic Distortion. Actual measurements are shown and results are validated by a THD calculator in the scope as well as a THD measuring multimeter. Videos mentioned in this video are: Audio Compressor project: https://youtu.be/1h0FZJYXQ_w Demo of above: https://youtu.be/pUii_pDQxg8 Basics of using FFT:"
YouTube Link 2019-10-02T00:38Z 220K followers, 105.5K engagements
"#94: RMS Voltage for Sine and square waves and why your DMM might not work right This video discusses the meaning of RMS voltage and runs through an example of sine waves illustrating the [-----] "factor". Examples of AC square waves and digital PWM waves are also shown along with cautions regarding the results obtained with DMMs including True-RMS DMMs which may not read the RMS values of digital waveforms correctly. Notes from the video can be found here: http://www.qsl.net/w/w2aew//youtube/RMS_voltage_DMM_measurements.pdf"
YouTube Link 2013-05-27T03:28Z 221K followers, 65.3K engagements
"#389 Kit Build: CFT1 5-band CW Field Transceiver - build / adjust / align / test THIS VIDEO HAS AN ERROR IN THE RF POWER ADJUSTMENT SECTION. PLEASE WATCH THE FOLLOWING VIDEO INSTEAD: https://www.youtube.com/watchv=yWVh9Ojz-ak This video shows the process of building and adjusting/aligning the CFT1 5-band CW portable transceiver. (NOTE: At 37:24 I incorrectly show adjusting RV2 it should be RV1 that you adjust for the PA RF Power). It includes tips on assembly and soldering as well as details on winding toroids (optional pre-wound available) and the final adjustment/alignment process. Here are"
YouTube Link 2024-09-15T19:55Z 210K followers, [----] engagements
"#56: Basics of Capacitor & Inductor self-resonance parasitics etc. - Tutorial This video builds upon the last two videos: Current and Voltage in Ls and Cs: http://www.youtube.com/watchv=ykgmKOVkyW0 LC Resonant Circuits: http://www.youtube.com/watchv=hqhV50852jA that discussed the voltage and current properties of capacitors and inductors then discussed the concept of resonance. This video looks at some of the practical aspects of component selection by discussing the various parasitic properties of real-world (non-ideal) components and how these properties can dramatically alter the device"
YouTube Link 2012-07-29T21:08Z 216K followers, 115.9K engagements
"#20: Quick [--] minute Tektronix Mixed Domain Oscilloscope MDO4000 Demo This video is a very quick 5min demonstration of the new Tektronix MDO4000 - a Mixed Domain Oscilloscope. Its the first scope of its kind that adds a time-correlated Spectrum Analyzer to a Mixed Signal Oscilloscope thereby giving you one instrument that includes [--] analog scope inputs [--] digital inputs and one dedicated RF input. The Spectrum Analyzer is very nice large screen basic spectrum analyzer which includes some very "non-basic" features. These include a Spectrogram display (to show spectral history of the"
YouTube Link 2011-09-27T02:46Z 218K followers, [----] engagements
"#365: Ham Radio: What is your CW straight key sending style This video poses the question - how do you operate your straight key when sending Morse Code (CW) There are a LOT of ways to do this. I show a few common techniques but there certainly are more variations. What do you do More about Straight Key Night: http://www.arrl.org/straight-key-night My video on the Basics of Morse Code: https://youtu.be/78VXLVZckIQ W2AEW Tek Tektronix Morse Code CW ham radio telegraphy W2AEW Tek Tektronix Morse Code CW ham radio telegraphy"
YouTube Link 2022-12-31T21:12Z 226K followers, 21.6K engagements
"#142: Basics of High Voltage Probes and how to use them The basics of old-school high voltage probes that are used with multimeters VTVMs and DMMs. The basic theory of operation construction and use of these probes is presented. Some cautions about some unexpected behavior of modern DMMs is also presented. PLEASE NOTE: HIGH VOLTAGE CAN BE VERY DANGEROUS - DO NOT ATTEMPT TO MAKE ANY HIGH VOLTAGE MEASUREMENTS IF YOU DO NOT KNOW WHAT YOU ARE DOING. THIS VIDEO DOES NOT PRESENT ALL OF THE NECESSARY PRECAUTIONS THAT NEED TO BE TAKEN WHEN MEASURING HIGH VOLTAGE"
YouTube Link 2014-04-24T21:55Z 225K followers, 94.3K engagements
"#135: Measure Capacitor ESR with an Oscilloscope and Function Generator This video discusses how to measure the ESR (equivalent series resistance) of a capacitor using an oscilloscope and function generator. All of the capacitors tested in this video were 220uF electrolytic caps. In reality the resistance in the plates of a dried out electrolytic capacitor can't be modeled as a simple series resistor but for the purposes of identifying good from bad this simplification works fine. In the video I show the ESR meter that I made in [----]. The video for that is here:"
YouTube Link 2014-03-22T04:42Z 224K followers, 315.5K engagements
"#221: The Bird [--] Directional Wattmeter: Overview and how-to use An introduction overview and how-to-use tutorial of the venerable Bird Model [--] Thruline directional RF wattmeter / power meter. The Bird [--] was introduced in [----] and is still being produced/sold today largely unchanged from its original design. These meters are basically the standard of the industry much like Fluke is for DMMs. I review the various aspect and elements of the meter what the slugs do and how to use the meter. While this meter does not measure VSWR (voltage standing wave ratio) you can determine SWR from the"
YouTube Link 2015-12-11T04:33Z 223K followers, 107.9K engagements
"#359: Quick Tip: Selecting 10x passive probes for your oscilloscope - Bandwidth and Compensation. This video answers the most common questions I get about oscilloscopes and probes. What BW probe should I get Can I use a probe with a BW that is different than my scope BW etc. One important consideration presented in the video is ensuring that the probe can be properly compensated. Here are videos that I have done in the past on probe compensation: https://youtu.be/oxJQr4dKnys https://youtu.be/SX4HGNWBe5M"
YouTube Link 2022-07-24T22:50Z 223K followers, 16.7K engagements
"#372: How to install an N-connector crimp-on type to LMR-600 RG-217 or similar coax cable This video shows how to install a crimp-on style N-male connector onto coaxial cable - specifically LMR-600 RG-217/U or other 0.59" cable types. Other coax styles will be similar but may have different strip dimensions. Always consult the installation guide. The connector shown is from Max-Gain Systems: http://www.mgs4u.com W2AEW Tek Tektronix ham radio coax how-to tutorial n-connector crimp on install W2AEW Tek Tektronix ham radio coax how-to tutorial n-connector crimp on install"
YouTube Link 2023-09-05T20:51Z 226K followers, 49K engagements
"#346: Basics of Capacitor Leakage / using the Antique Wireless Association DC Leakage Tester This video discusses the basics of capacitor leakage and how to test for it - focusing on the DC Leakage Tester available as a circuit board from the Antique Wireless Association. Here are the links for this video: Antique Wireless Association DC Leakage Tester PCB: https://www.antiquewireless.org/homepage/pcb-item-4/ Some good info on old electrolytic capacitors: http://conradhoffman.com/capchecktut.htm RadioWild's Youtube Channel: https://www.youtube.com/radiowild Notes from this video:"
YouTube Link 2022-01-24T04:27Z 225K followers, 47.9K engagements
"#287: How to use the Delayed B-Sweep Timebase on Tektronix [----] [----] [----] [----] Oscilloscopes This short video shows how to use the B timebase also known as the Delayed Timebase on the Tektronix [----] [----] [----] and [----] series of oscilloscopes. Most of the basic functionality and controls are demonstrated. These features are what we used to zoom into certain areas of a waveform in the days before we had digital oscilloscopes"
YouTube Link 2018-07-20T04:30Z 224K followers, 33.6K engagements
"#171: IQ Signals Part II: AM and FM phasor diagrams SSB phasing method This is a followup video to the IQ Basics: https://www.youtube.com/watchv=h_7d-m1ehoY .showing the resulting phasor diagrams of the IQ signals for a few different RF signal types. AM frequency offset and FM are shown and the use of quadrature techniques for SSB generations through the Phasing Method is discussed. Notes from this video can be found here: http://www.qsl.net/w/w2aew//youtube/IQ_Signals_AM_FM_SSB_phasing.pdf"
YouTube Link 2014-09-08T13:42Z 225K followers, 135.9K engagements
"#337: Use a NanoVNA to measure input impedance and gain of a small-signal RF amplifier This video shows how to measure the input impedance and gain of a small-signal RF amplifier - including the use of an attenuator to keep the amp in it's linear range and also to not overdrive the NanoVNA. This stems from a recent conversation with Bill N0CQR (SolderSmoke podcast). The amplifier featured is a "Termination Insensitive Amplifier" or TIA that is described in paper by Wes Hayward (W7ZOI) and Bob Kopski (K3NHI) - see links below: Soldersmoke blog: http://soldersmoke.blogspot.com/ Wes's webpage:"
YouTube Link 2021-07-18T18:04Z 225K followers, 97.5K engagements
"#223: Basics of the Gilbert Cell Analog Multiplier Mixer Modulator A short tutorial on the basics of the Gilbert Cell - a very popular analog four-quadrant multiplier circuit that has a wide variety of applications ranging from variable gain amplifiers to mixers and balanced modulators. The video is light on the math focusing mainly on delivering a practical intuitive understanding of how the circuit operates. It is highly recommended that the viewer be familiar with the basic operation of a differential-pair. Video #193 (linked below) would be a good thing to review to freshen up on the"
YouTube Link 2015-12-21T16:16Z 224K followers, 114.5K engagements
"#101: How to measure FM Frequency Deviation without special equipment using Carrier / Bessel Null More details here please read This video shows how to measure FM Frequency Deviation using the Carrier or Bessel Null method. Ideally no special equipment is needed besides a CW receiver capable of tuning to the FM transmit frequency an audio generator a method of properly adjusting the the audio into the transmitter and a safe way of coupling the TX output into the receiver. This method takes advantage of the fact that the carrier of an FM signal modulated with a single audio tone will pass"
YouTube Link 2013-07-18T03:25Z 224K followers, 42.2K engagements
"#404: The VFET is a JFET that thinks it is a Triode vacuum tube - aka Static Induction Transistor This video is a quick introduction to the Static Induction Transistor also known as a Vertical FET or VFET. This device is a JFET that behaves like a vacuum tube Triode. You may want to refresh yourself on what a Junction Field Effect Transistor (JFET) is and it's characteristics by reviewing this video: https://youtu.be/oambDFa0Pr8 Here is a really nice writeup on these devices from an audio applications perspective: https://fromvinyltoplastic.com/what-are-static-induction-transistors-sit/ The"
YouTube Link 2025-10-24T01:56Z 226K followers, 17.7K engagements
"#299: How to build an Open - Short - Load (OSL) Calibration kit for HF Antenna Analyzer In video #280 I did a complete review of the RigExpert AA-55 ZOOM Antenna Analyzer and showed how to use an open-short-load (OSL) calibration kit to calibrate the analyzer to the end of a transmission line. In other words to remove the transmission line from the measurements. This video shows how to build your own OSL cal kit that is suitable for HF use (to basically the frequency limits of the SO-239 / PL-259 connectors). The SO-239 to SMA-female adapters used in this video are:"
YouTube Link 2019-04-07T21:21Z 223K followers, 42.8K engagements
"#88: Cheap and simple TDR using an oscilloscope and 74AC14 Schmitt Trigger Inverter This video is a follow on from my previous video that discussed how to measure the length and impedance of coax using an oscilloscope and an pulse generator. This previous video goes into more of the theory and the different measurements you can make. It can be found here: http://youtu.be/Il_eju4D_TM However this video showed the use of a pulse or function generator as the signal source. The problem is that most inexpensive generators won't have a fast enough risetime to be able to resolve shorter cables or"
YouTube Link 2013-04-21T20:05Z 226K followers, 197.9K engagements
"#394: Oscilloscope Best Practices - some of the most common issues and tips This video is a brief reminder of some of the most common considerations to optimize your measurements and signal / waveform fidelity with your oscilloscope. Each of the "tips" is briefly discussed. I have videos on many of these tips individually linked here: 10X probe tutorial: https://youtu.be/SX4HGNWBe5M Capacitive Loading of Probes: https://youtu.be/sPSJnj7gVJA 10X Probe Selection: https://youtu.be/2qLd_Y2EpNs Importance of Probe Compensation: https://youtu.be/oxJQr4dKnys Probe Ground Lead Length:"
YouTube Link 2024-12-16T01:31Z 226K followers, 39K engagements
"#393: Analysis of the RF characteristics of the Baofeng UV-5R Dual Band HT This video takes a quick look at the RF transmitter performance of the Baofeng UV-5R Dual Band transceiver. It takes a look at the RF harmonic emissions the transient key-up characteristics the CTCSS performance and a look at some unusual higher frequency FM content. W2AEW Tek Tektronix amateur radio HT Baofeng UV-5R harmonics PL tone CTCSS transceiver measurements W2AEW Tek Tektronix amateur radio HT Baofeng UV-5R harmonics PL tone CTCSS transceiver measurements"
YouTube Link 2024-10-10T01:57Z 226K followers, 18.4K engagements
"#51: Basic Spectrum Analyzer Do's and Dont's . .or how NOT to blow up your Spectrum Analyzer This video covers the very basics of how to safely use your spectrum analyzer without damaging it and how to setup the basic controls to get usable results. It is not intended to be a full tutorial on how to use a Spectrum Analyzer just enough to allow you to use with without damaging it and how the "Auto" coupled settings for things like the vertical Attenuator the RBW and Sweep operate"
YouTube Link 2012-06-19T20:40Z 223K followers, 275.7K engagements
"#315: How to use the NanoVNA to measure a low-pass filter This video shows step-by-step how to use the NanoVNA to measure a simple lowpass filter. The filter used in the video was originally featured in the Michigan Mighty Mite video (#228): https://www.youtube.com/watchv=2AdW9Zpl2Es The video walks through trace selection and configuration sweep setup calibration and measurement. Please note that when running the calibration the OPEN SHORT and LOAD are connected to CH0 (not CH1). Please see my previous videos on VNA calibration VNA basics and other topics including Smith Charts to learn"
YouTube Link 2020-06-23T19:34Z 224K followers, 106.2K engagements
"#402: Overview of the Sysjoint SV4401A Vector Network Analyzer from Chelegance This video provides an overview / introduction to the Sysjoint SV4401A 4.4GHz VNA offered by Chelegance. It provides an overview of the features and simple menu structure of the unit. More info specifications documentation and distributors can be found on the Chelegance site linked below: https://chelegance.com/products/sv4401a-4-4g-vna-with-7-capacitive-touchscreen/ w2aew tek Tektronix vna nanovna network analyzer vector network analyzer ss4401a sysjoint chelegance introduction w2aew tek Tektronix vna nanovna"
YouTube Link 2025-08-23T04:43Z 226K followers, 14.6K engagements
"#318: NanoVNA comparison measuring a duplexer - NanoVNA-H4 and SAA-2N Is the NanoVNA suitable to measure/adjust a typical antenna duplexer This video compares the NanoVNA-H4 and the SAA-2N VNAs with a professional VNA (Tektronix TTR506A). Will the limited dynamic range of the NanoVNA get in the way of making a good measurement or limit the ability to adjust the duplexer Watch and find out"
YouTube Link 2020-10-03T03:25Z 224K followers, 81.2K engagements
"#397: How to use cursors on Tektronix [----] series scopes including some "secret" features This video shows how to use the cursors on the Tektronix [----] series oscilloscopes such as the [----] [----] and [----]. Basic cursor functions for measuring voltage time and frequency are covered as well as the lesser known features to measure amplitude ratios duty cycle and phase. W2AEW Tek Tektronix oscilloscope scope tutorial how to cursors voltage time frequency ratio phase W2AEW Tek Tektronix oscilloscope scope tutorial how to cursors voltage time frequency ratio phase"
YouTube Link 2025-03-08T22:53Z 226K followers, 10.5K engagements
"#10: AC / DC Coupling on an Oscilloscope This video discusses the AC and DC vertical coupling modes on an oscilloscope. It shows that these settings are not really the same thing as the AC/DC settings on a multimeter but rather they dictate how the signal is coupled to the vertical channel of the scope. In many cases the DC coupling mode is very useful for looking at AC signals. Similiarly the AC coupling mode can be very useful when looking at DC signals. The choice of which vertical coupling mode to use depends upon the signals and circuits that you are looking at"
YouTube Link 2011-06-28T01:50Z 225K followers, 122K engagements
"#188: Mini review / demo: GP-5/SSB Shortwave AM/FM and SSB portable receiver This is a brief review and demonstration of the CountyComm GP-5/SSB portable receiver that operates on AM FM Shortwave and shortwave single-sideband. It is manufactured by Tecsun but not offered under that brand (at the time of video production). It is the same form factor as the Tecsum PL-360 so I wouldn't be surprised if Tecsun offers a version of this radio in the future. Overall a very nice little ultra-portable receiver that includes USB and LSB reception on shortwave - very unusual to find in a receiver of this"
YouTube Link 2014-12-30T21:04Z 223K followers, 56.3K engagements
"#384: What is the bandwidth of a CW / Morse code signal (as a function of speed and rise/fall time) The occupied bandwidth (OBW) of a CW / Morse code signal is primarily dependent upon the keying speed (Words per minute / WPM) and the rise/fall time of the RF envelope. Radios and operator practice give you control over the WPM but not many radios give you control over the RF rise and fall time (which can have a major effect). This video shows measurements of the Occupied BW at various keyer speeds and RF rise/fall times. Equipment used in this video include: Tektronix MSO44B oscilloscope:"
YouTube Link 2024-03-28T01:41Z 226K followers, 19.8K engagements
"#173: Introduction to RTL-SDR low cost software defined radio receivers A very generous subscriber donated an RTL-SDR DVB-T TV Tuner dongle to the channel (Thanks John N). This video gives a very brief introduction to these very inexpensive software defined radios. These little receivers can be picked up for $20 (or less) and the software to run them is available for free such as SDRsharp (SDR#) and HDSDR. A couple of very good links to get you started including a really great "getting started" page which walks you through step-by-step getting your first RTL-SDR up and running:"
YouTube Link 2014-09-22T03:49Z 223K followers, 61.2K engagements
"#363: Ham Radio Review: The Penntek TR-45 Lite 5-Band 5-Watt CW portable QRP transceiver This is a short review of the new Penntek TR-45L 5-band 5-watt CW QRP transceiver produced by WA3RNC. We take a look at the physical characteristics and the completely menu-less operation of the rig. Such a fun transceiver to operate Production expected to begin for factory wired/aligned units in early [----] to be followed by kit availability shortly after that. For more information visit the product webpage: https://www.wa3rnc.com/store/penntek-tr-45l-qrp-transceiver Inside pics:"
YouTube Link 2022-12-11T19:30Z 226K followers, 61.3K engagements
"#396: Demystifying Oscilloscope Triggering - what it does and how to use it This video discusses the basic function of triggering on both analog and digital oscilloscopes. It discusses what the end goal is the differences in the underlying operation of the triggering function in analog and digital scopes and how to setup a the most basic (and most common) trigger - a simple edge trigger. Links to other Oscilloscope Trigger video are listed below as well as a link to the PDF file of the notes from this video. Notes from this video: http://www.qsl.net/w2aew/youtube/DemystifyTriggering.pdf Basic"
YouTube Link 2025-02-21T03:51Z 226K followers, 29.9K engagements
"#11: Tektronix Oscilloscope Triggering controls and their usage This video describes the Triggering controls on a typical Tektronix analog oscilloscope. Other analog scopes will typically be similar. The video presents the Trigger Level Slope Source Coupling Mode and Holdoff controls and how each of them are used and their affect on the triggering capability of the scope"
YouTube Link 2011-07-02T03:28Z 224K followers, 173.1K engagements
"#267: Quick Tip: Making IC & Transistor part numbers easy to read This short article in EDN by Jay Davis reminded me of this great little trick to make laser-marked part numbers on ICs and transistors easier to read: http://www.edn.com/electronics-blogs/benchtalk/4458617/Simple-trick-lets-you-see-your-parts So I decided to make a video about it. All you need is a piece of tape"
YouTube Link 2017-08-19T02:08Z 223K followers, 33.2K engagements
"#373: Portable ham radio / POTA: The Spiderbeam 40' (12m) telescoping mast and hitch mounted support This short video shows my new Spiderbeam [--] meter (40 foot) telescoping mast and the trailer-hitch mounted support that I plan to use to support wire antennas for portable / POTA operations. I modified the "flagpole" mount to better accommodate the 40' tall mast. The specific products I used in this video are: Spiderbeam mast: http://www.vibroplex.com/contents/en-us/p3532.html Flagpole mount for 2" receiver: https://www.amazon.com/dp/B004IVGA0Gpsc=1&ref=ppx_yo2ov_dt_b_product_details PS: Found"
YouTube Link 2023-10-02T22:09Z 226K followers, 23.2K engagements
"#120: How to Install Anderson Powerpole connectors This video shows how to install Anderson Powerpole connectors onto a power cable / wire. These connectors are very popular with the amateur / ham radio community as well as emergency and first response teams (ARES RACES CERT) as a universal reliable way to connect radio equipment to power sources (batteries vehicles power supplies). I also discuss the benefits and downsides of soldering these connectors. Table Of Contents: 0:00 - Introduction and stripping length 1:15 - Dovetails on Housings to mate housings together 2:00 - "Standard""
YouTube Link 2013-12-01T01:13Z 224K followers, 411.5K engagements
"#293: The [----] ARRL Handbook for Radio Communications - Boxed Set - brief intro/review The 96th edition of the ARRL Handbook is now available as a 6-volume boxed set http://www.arrl.org/shop/ARRL-Handbook-2019 This video introduces the Handbook and briefly shows the contents of each volume. The new multi-volume boxed set option is a very handy and convenient way to enjoy this fabulous reference book. The handbook will appeal to anyone interested in learning more about electronics RF circuits and techniques and more. It's not just about amateur radio"
YouTube Link 2018-10-08T17:40Z 223K followers, 27.9K engagements
"#334: How to tune a duplexer with a NanoVNA V2plus4 is it possible This video shows how to tune a 1.2GHz repeater duplexer using a NanoVNA V2plus4. A TX/RX Systems Vari-Notch duplexer is used in this video. One interesting question - does the NanoVNA V2plus4 have enough dynamic range to accurately tune the filters - particularly the notch / band-reject filter sections I check the results using a more professional VNA - the Tektronix TTR506A. A brief description of the function of the duplexer is given followed by the setup and calibration of the VNA and then the tuning process. SPOILER ALERT:"
YouTube Link 2021-07-05T21:49Z 224K followers, 83.1K engagements
"#99: Drag Soldering of an SSOP IC Package demonstration For soldering an SO-8 package see this video: http://www.youtube.com/watchv=7B_-qmJLfng This video shows the technique of drag soldering on an SSOP IC package. On this package the lead pitch is 0.025" (0.635mm). This lead pitch is a little too tight to be able to easily solder a lead at a time. Drag soldering works pretty well and is fairly easy to master with a little practice (and FLUX)"
YouTube Link 2013-07-09T03:46Z 223K followers, [----] engagements
"#297: Basics of the Smith Chart - Intro impedance VSWR transmission lines matching Recording of a presentation I gave at a VHF Amateur Radio Conference in October [----]. It covers the basics of the Smith Chart - what it is how you plot complex impedance obtain VSWR return loss reflection coefficient transmission line effects and compute impedance matching networks. This presentation covers topics presented in some of my other videos but does not include the live demonstrations shown in these videos: Visualize Antenna Tuner operation on a Smith Chart: https://www.youtube.com/watchv=f8wJ0io95RE"
YouTube Link 2019-03-07T18:09Z 223K followers, 263.2K engagements
"#406: Current Regulator/Limiting Diodes (JFET) and their applications Current Regulator diodes also known as Current Limiting diodes are really JFET devices that provide a constant current for a variety of applications. My videos on JFET current sources and the basics of JFET devices may be handy background videos for you: JFET current sources: https://youtu.be/XJadPFYWglQ JFET Basics: https://youtu.be/oambDFa0Pr8 Several applications are shown - including linear ramp generation capacitor measurement current mirrors relaxation oscillator and differential amplifier gain stabilization. One of"
YouTube Link 2025-12-29T06:39Z 226K followers, 17K engagements
"#268: How to operate a ZM-2 Z-Match Antenna Tuner kit by Emtech A short video showing how to operate the ZM_2 Z-Match antenna tuner. This is a kit by Emtech that I built 8-10 years ago and it works great. The built-in tuning indicator does a nice job indicating when a match is achieved especially when an SWR meter (in the rig or external) isn't available. This kit can be found here: https://steadynet.com/emtech/ More background on the Z-match tuner can be found via google and the links here: http://users.tpg.com.au/users/ldbutler/SingleCoilZMatch.htm http://www.qsl.net/g3vgr/zmatch.html"
YouTube Link 2017-08-30T19:42Z 222K followers, 32.3K engagements
"#398: My build of the SolderSmoke Challenge Direct Conversion Receiver for 40m This video introduces my build of the 40m direct conversion receiver that was conceived by the fine folks on the SolderSmoke blog and podcast. This is a fun project to make a simple [--] transistor receiver (for AM SSB and CW) for the [--] meter amateur radio band (7.0 to 7.3MHz). Included below are several links with more information on this project: Intro video to the DCR Challenge Project from SolderSmoke's YT channel: https://www.youtube.com/watchv=rLjxU2rMeXw There are detailed videos on each functional block of"
YouTube Link 2025-06-01T17:09Z 226K followers, 18.6K engagements
"#185: Back to Basics: Bipolar Transistor bias circuits and Beta dependence This tutorial back-to-basics video discusses the operating point (or quiescent point Q-point bias point etc.) of a bipolar transistor (BJT) circuit and how the choice of the circuit design can affect how sensitive the bias point will be to the value of Beta (current gain) of the transistor. Ideally you'd want to use a circuit which is completely independent of beta so that a wide variety of transistors could potentially be used. Three different transistor bias circuits are demonstrated with three transistors each with"
YouTube Link 2014-12-02T12:01Z 225K followers, 126.4K engagements
"#166: How to wind a trifilar toroid transformer for a diode ring mixer A short video demonstrating how I wind a trifilar wound toroidal transformer that is used in a classic diode ring mixer. A T37-6 toroid is used along with some 30AWG heat-strippable magnet wire making this mixer suitable for HF and low VHF operation. You'll find lots of great toroid data including winding data calculators etc. on this page - including the links at the top of the table: http://www.kitsandparts.com/toroids.php"
YouTube Link 2014-08-12T21:44Z 224K followers, 50.2K engagements
"#196: How a Directional Coupler in an SWR meter works This video describes how a dual directional coupler that is used in an SWR meter operates. It describes and demonstrates how voltages are developed that are directly proportional to the forward and reflected signals on a transmission line. The coupler shown is a common designed used by ham radio homebrewers in their SWR meter designs. It is widely published and can be found in several issues of the ARRL Handbook. Basics of Directional Couplers: https://www.youtube.com/watchv=iBK9ZIx9YaY Video Notes:"
YouTube Link 2015-03-07T12:43Z 224K followers, 156.6K engagements
"#321: Vintage Tech: The Simpson [---] VOM Volt-Ohm-Milliammeter family Video Table of Contents: 00:00 Introduction to the [---] 01:02 Common features of all [---] Series 03:00 Review of the Series [--] thru [--] 08:24 Continuing with Series [--] and [--] (and the odd probe connector) 10:35 Meaning of the suffix letters 11:25 A great website resource 11:49 What to look for when buying a used [---] 12:44 Common problems with older 260s 14:02 Final comments and advice 16:24 Closing This video discusses the Simpson [---] VOM family first introduced in the 1930s and still in production today. It is likely the most"
YouTube Link 2020-12-08T05:20Z 225K followers, 47.9K engagements
"#405: Using TinySA Ultra to measure keyer speed of a Kenwood TS-890S transceiver This video shows how to measure the keyer speed of a CW transmitter using a TinySA Ultra in Zero Span mode with a trigger. The formulas are simple: WPM = 1.2/unit_length and unit_length = 1.2/WPM .where: WPM = Words Per Minute unit_length = time duration of a "dit" The rig is a Kenwood TS-890S and the measurement verified that the WPM setting is accurate (unlike some rigs shown in my previous video linked below) Previous video detailing keyer speed measurements (#378): https://youtu.be/SvXelAaDPfI w2aew tek"
YouTube Link 2025-12-13T18:20Z 226K followers, 32.2K engagements
"#296: SSB & AM RF Envelopes Peak Envelope Power (PEP) Average Power and more The RF envelope of a single sideband (SSB) signal is compared to an Amplitude Modulated (AM) signal. RF power measurement is defined and illustrated including Peak Envelope Power (PEP) and Average Power. The RF output power considerations for both SSB and AM signals are presented and demonstrated. Notes from this video are found here: http://www.qsl.net/w2aew/youtube/PeakEnvelopePower.pdf"
YouTube Link 2019-01-21T00:03Z 222K followers, 60.7K engagements
"#158: Directional Coupler Basics & how to sweep SWR of an antenna Return Loss VSWR This video describes the basic properties and specifications for directional couplers and shows their basic operation on an oscilloscope. Typical applications are discussed along with a practical example showing how to sweep the VSWR or Return Loss of an antenna using a directional coupler and a spectrum analyzer with a tracking generator. The resulting return loss measurement is compared to the SWR measured on an MFJ-259B antenna analyzer. Datasheet for the directional coupler used in this video:"
YouTube Link 2014-07-06T04:41Z 224K followers, 218.2K engagements
"#272: Vintage Tech: Sencore TC162 Tube Tester: How to use tips and peek inside This is a short overview of the Sencore TC162 Vacuum Tube (Valve) Tester including some basic tips on tube testing a review on how to use this tester and even a peek inside to see how it is built"
YouTube Link 2017-11-18T15:19Z 223K followers, 16.4K engagements
"#405: The CurveBug - a dual octopus style debugging tool from VintageTEK The CurveBug is a debugging / troubleshooting 2-terminal curve-tracer tool developed by VintageTEK to benefit their non-profit operations. The function of the CurveBug is very similar to the well-known "octopus" tester - which is a highly simplified version of the Huntron Tracker. I did a video on the Octopus that has been viewed over [------] times: https://youtu.be/Gwo3pEH7hUE The CurveBug has two curve-tracer "channels" allowing you to simultaneously probe two circuits (one suspect one known good) to look for"
YouTube Link 2025-11-10T23:22Z 226K followers, 11K engagements
"#303: What is a Pulse Counting FM Demodulator Detector Discriminator This video describes how a Pulse Counting FM Discriminator works - it is a unique FM demodulator that doesn't require and tuned circuits like the FM Ratio Detector or Foster Seeley discriminator. It operates by measuring the changing duty cycle resulting from a series or fixed width pulses that are synchronized to the carrier or IF frequency. Here is a link to Alan Yates' blog on a discrete FM broadcast receiver made using this technique: http://www.vk2zay.net/article/250 A link for the diode ring mixer (that I promised):"
YouTube Link 2019-08-22T17:23Z 224K followers, 41.7K engagements
"#122: Electronic Circuit Construction Techniques: review of some prototype circuit building methods This video reviews several of the electronic circuit prototyping techniques that I like to use. Most of the circuits shown have been used in previous videos. This video focuses more on the methods and techniques used to build the circuits. Several examples are given along with web references. Please see the URL's below: Dave Richards (AA7EE) blog featuring a "WBR" receiver: http://aa7ee.wordpress.com/2011/07/24/the-wbr-a-simple-high-performance-regen-receiver-for-40m-by-n1byt/ His main blog"
YouTube Link 2013-12-27T06:02Z 223K followers, 161.7K engagements
"#65: Basics of using FFT on an oscilloscope This video briefly presents the basics of using a Fast Fourier Transform (FFT) function of a modern digital oscilloscope to observe the frequency or spectral content of a signal. It discusses how the setup of the scope (sample rate record length memory depth etc.) influences the frequency range and resolution of the FFT result. It also shows how the "high-resolution" sampling mode of the scope can be used to increase the vertical resolution of the scope. The example used shows the result of measuring the audio frequency content of the noise created"
YouTube Link 2012-11-08T23:24Z 226K followers, 193.7K engagements
"#151: How to wind a toroid inductor A quick tutorial This video shows one method I use to wind toroidal inductors and transformers. The real trick is often how to hold the toroid core while doing the winding of the wire. The plastic toroid fixture shown is available from http://www.qrpme.com. I also give a few details on how to strip the enamel insulation and then test the inductor when it is complete. There are many many useful websites that contain toroid data including composition type size materials winding factors calculators and more. Here is a short list of the useful information you"
YouTube Link 2014-06-01T13:47Z 224K followers, 116.3K engagements
"#270: Tune a Duplexer with a Spectrum Analyzer + Tracking Gen or VNA This video shows how to tune a notch-type duplexer using a spectrum analyzer with a tracking generator as well as with a vector network analyzer (VNA). It also discusses the basics of what a duplexer is and a quick review of the most popular types. Notes from the video can be found here: http://www.qsl.net/w2aew/youtube/DuplexerTuning.pdf"
YouTube Link 2017-11-04T04:11Z 224K followers, 129.9K engagements
"#310: 3rd order Intermodulation Distortion (IMD) and their effect in radio receivers This short video discusses 3rd order IMD (intermodulation distortion) products what they are and how they can adversely affect radio reception under crowded band conditions. Finally I show how the proper use of input attenuation can help mitigate the negative effects of IMD. Notes: http://www.qsl.net/w2aew/youtube/3rd_order_IMD.pdf Spectrum display courtesy of the Spectrum View feature on a Tektronix MSO64 oscilloscope - gotta love that fast update rate even with 50Hz RBW"
YouTube Link 2020-04-24T01:31Z 225K followers, 41.8K engagements
"#195: RF Diplexer Basics: Tutorial construction and tuning This video introduces the RF Diplexer which is a pair of filters used to separate RF signals on a single feedline into two different feedlines based on their band of operation. These are commonly used with dual-band radios and satellite communications where the uplink is often in the VHF frequency band and the downlink is in the UHF frequency band. The circuit board is shown and the physical construction of the filter and hand-wound inductors is discussed. Then the diplexer is connected to the spectrum analyzer with tracking generator"
YouTube Link 2015-02-22T22:39Z 224K followers, 46.3K engagements
"#190: Back to Basics: Transistor Current Sources and Mirrors This video is a back-to-basics tutorial on transistor current sources - what they are some applications for them and some circuit examples. The basic characteristics of current sources and sinks are presented and demonstrated including the measurement of the output impedance of these simple current sources. Here is a link to the note pages used in this video: http://www.qsl.net/w2aew/youtube/transistorcurrentsources.pdf Viewer +BersekViking pointed out a problem with my test setup. Can you guess what it is Here is a link to my"
YouTube Link 2015-01-17T17:43Z 224K followers, 150.9K engagements
"#255: Vintage Tech: Book review "ABC of Electricity" from [----] endorsed by Edison Just a short review of a book called "ABC of Electricity" published in [----] (intended for a younger audience) and endorsed by Thomas A. Edison. Very interesting to see the state of technology and how it is presented especially given that this was a few years before Lorentz' Electron theory was published"
YouTube Link 2017-03-25T18:40Z 224K followers, 10.6K engagements
"#61: Basics of RF Samplers Sampling-Tees RF-taps etc. This video discusses the basics of what RF Samplers are why/when they are used and the design variations available. Samplers are used most often to "pick-off" a small sample of an RF signal (usually from a transmitter) to be measured with a scope spectrum analyzer deviation meter etc. W2AEW ham amateur radio transmitter tx RF frequency sampler sampling tee oscilloscope scope spectrum analyzer meter distortion deviation test dummy load power coupling adjustable capacitive resistive tutorial Bird watt wattmeter [--] [----] tap taps W2AEW ham"
YouTube Link 2012-10-01T03:44Z 226K followers, 73.9K engagements
"#93: RS232 and SPI bus waveforms bus decodes and RF activity on the Moteino using Tek MDO4000 Just having a little more fun on the bench with the Moteino (see previous video on this Arduino close with RFM12B wireless transceiver) and the Tektronix MDO4000 Mixed Domain Oscilloscope. Here we view the analog waveforms for two different low-speed serial busses (RS-232 and SPI) decode those busses and look at the RF spectrum characteristics and FSK modulation characteristics vs. time - all using a single capture on the scope. W2AEW Tek Tektronix MDO MDO4000 mixed domain oscilloscope scope RS232"
YouTube Link 2013-05-27T01:38Z 226K followers, 11.6K engagements
"#224: AM & DSB-SC Modulation with the Gilbert Cell This video builds upon video #223 (intro to Gilbert Cell) - describing how AM (amplitude modulation) and DBS-SC (double sideband suppressed carrier) modulation can be performed using a Gilbert Cell as a balanced modulator. These modulation types are both possible with simple changes to the DC bias applied to the baseband inputs. Controlling the offset (and baseband signal magnitude) will set the modulation depth of the AM signal. The circuit used in the demonstration is essentially the same signal from video #223 with a minor change to enable"
YouTube Link 2015-12-31T06:01Z 226K followers, 54.9K engagements
"#50: QRP SSB contact on 40m from Hamfest of RVRC June [----] This short video was taken at the June [----] Raritan Valley Radio Club hamfest in Piscataway NJ. The rig is an Icom IC-703 running less than 10Wpep on 40m SSB 7aH gel cell battery and a Par Electronics tri-band EFHW (end fed half wave) antenna supported by a 60' telescoping tower in an old mobile broadcast support van. The video shows a check-in with W8EB Bil net control for the Norcars net. W2AEW ham radio QRP low power battery par end fed half wave efhw ssb 40m Norcars net tailgate hamfest RVRC raritan Valley Piscataway NJ Icom"
YouTube Link 2012-06-17T01:13Z 226K followers, [----] engagements
"#344: ARRL 49:1 End Fed Halfwave UNUN transformer kit from HFKits - Build and quick bench test Today's video features the ARRL EFHW Antenna Kit by HFKits.com which is essentially a nice weatherized 49:1 UNUN Transformer to convert the 2500-3000 ohm end-fed halfwave feedpoint impedance down to approximately [--] ohms. I review how to build/assemble the unit and run a quick bench test. The kit is available from the ARRL as well as HFKits. Here are a few links: ARRL: Sale page: http://www.arrl.org/shop/End-Fed-Half-Wave-Antenna-Kit-for-10-15-20-40-Meters/ Instructions:"
YouTube Link 2021-12-26T21:29Z 226K followers, 84.4K engagements
"#246: How to operate / tune the Yaesu FRG-7 Frog-7 Receiver This video shows how to tune the Yaesu FRG-7 Communications Receiver. It operates a little differently than a conventional receiver due to the Wadley Loop architecture being used. It shows the details on how to use the preselector and megahertz tuning controls. For more information on the Wadley Loop circuit please see my previous video: https://www.youtube.com/watchv=JvS9tBWAc1s W2AEW Tek Tektronix HF receiver communication receiver receiver tune how to instruction tutorial wadley loop preselect preselection preselection filter"
YouTube Link 2016-10-03T20:29Z 226K followers, 46.9K engagements
"#316: Use NanoVNA to measure coax length - BONUS Transmission Lines and Smith Charts SWR and more TWO Part video: Part [--] shows how to use the Transform function in the NanoVNA to measure coax length or distance to fault. Part [--] (starting at about 4:40) digs a bit deeper into the effects of a transmission line on the observed impedance and SWR how this is represented on the Smith Chart and some of the "magic" of quarter-wavelength long lines. I refer to a video on a T/R Switch that uses PIN Diodes and a 1/4 wavelength line: https://www.youtube.com/watchv=A1BAq0KxIdc Here are the notes and"
YouTube Link 2020-06-28T04:51Z 226K followers, 174.3K engagements
"#407: Installation of Yaesu optional 500Hz Collins Mechanical Filter in the FT-857D This video shows the simple installation of the optional Collins Mechanical Filter in the Yaesu FT-857D transceiver. Yaesu offered three different optional filters - the YF-122S 2.3kHz filter for SSB (single sideband) the YF-122C 500Hz filter for CW and the YF-122CN 300Hz CW filter. The video shows the 500Hz CW filter and then verifies it's operation while listening to several CW signals. w2aew tek tektronix yaesu ft-857d ham radio transciever filter collins mechanical CW morse code SSB w2aew tek tektronix"
YouTube Link 2026-01-16T21:48Z 226K followers, [----] engagements
"#97: Low Power (QRP) Ham Radio contact at the [----] RVRC Hamfest in NJ This video clip was shot by my friend Bob KC2RDU. It shows me making a low power (QRP) contact to a ham in NC from our club's annual hamfest in NJ. This was at about 6:40AM local time. The contact was made with Joe KJ4RNW in NC using an Icom IC-703+ running approx 5W using a end-fed half-wave antenna. W2AEW QRP Ham Radio Hamfest QSO Contact Low Power W2AEW QRP Ham Radio Hamfest QSO Contact Low Power"
YouTube Link 2013-06-23T04:44Z 226K followers, [----] engagements
"#342: Mini review: County Comm GP-7 / SSB handheld AM/FM/SW/SSB/CW Receiver Contents: 00:00 Introduction 00:59 Overview of improvements over GP-5/SSB 01:57 Weight Battery and Volume Control differences 03:57 Lets try out some features: Shortwave reception example 04:08 Band Selection Controls 04:47 Ham Radio Band Selection 05:04 Tuning Controls and Step Size 05:52 Auto-scan in VFO Mode 06:18 Direct Frequency Entry 06:53 Ham Radio goodies - step size and filter bandwidth 07:17 Filter BW example on CW 08:46 View filter BW using FFT on an oscilloscope 10:29 SSB Reception example on 40m band"
YouTube Link 2021-11-27T04:15Z 226K followers, 20.1K engagements
"#119: Basics of Resolution Bandwidth and Video Bandwidth in a Spectrum Analyzer (RBW VBW) This is a tutorial and demonstration of the basics of the Resolution BW (RBW) and Video BW (VBW) functions in a Spectrum Analyzer. You may wish to review the "Basics of a Spectrum Analyzer" video if you are unfamiliar with the basic functions and block diagram of a swept spectrum analyzer. Here is the link for that video: http://www.youtube.com/watchv=4Y6ji0QBsww This video covers the definition of these terms where they exist in the analyzer what they do and the effects they have on the displayed"
YouTube Link 2013-11-23T04:24Z 226K followers, 179.8K engagements
"#409: Ham Radio: POTA go-kit using a Hidden Woodsman M55 Haversack for the Elecraft KX2 This video shows a go-kit I put together for my Parks On The Air (POTA) amateur radio field operations. It uses a M55 Haversack from Hidden Woodsman. I need to blame/thank my good friend Thomas K4SWL for introducing me to this pack in his blog and video: https://qrper.com/2026/01/hidden-woodsmen-haversack-first-pota-test-of-my-new-ft-818-field-kit/ https://youtu.be/bshcVL7XZYk This bag can be purchased here: https://thehiddenwoodsmen.com/product/m55-haversack/ w2aew Tek Tektronix M55 Haversack POTA parks"
YouTube Link 2026-02-01T21:50Z 226K followers, [----] engagements
"#156: Hamfest Highlights of the [----] RVRC Hamfest in Piscataway NJ A collection of highlights and happenings from the [----] Raritan Valley Radio Club hamfest in Piscataway NJ held on [--] June [----]. Great vendors and tailgaters a bit of QRP radio operation and fantastic weather. http://www.w2qw.org http://www.w2qw.net https://www.youtube.com/user/radiowild http://www.manualman.com/ http://www.hypowerantenna.com/ http://www.kjielectronics.com/ Hamfest New Jersey (US State) Piscataway (City/Town/Village) W2AEW Tek Tektronix ham radio Amateur Radio (Hobby) RVRC oscilloscope QRP SSB CW EFHW antenna"
YouTube Link 2014-06-21T20:38Z 226K followers, [----] engagements
"#159: How to measure FM frequency deviation with a spectrum analyzer This short video shows a quick way to get a good estimate of the frequency deviation of a FM transmitter using a spectrum analyzer. This method isn't as accurate as the Bessel Null method shown in this video: https://www.youtube.com/watchv=8IBOYoIV5m8 But is is faster and easier to setup and doesn't require a single adjustable modulation tone. The RBW is set wide enough to "swallow up" the sidebands and then a min hold and max hold trace are used to capture the excursion. The frequency difference between the skirts of these"
YouTube Link 2014-07-12T04:17Z 226K followers, 66.7K engagements
"#198: Basics of a Vbe Multiplier: what it is how it works & where it is used The Vbe Multliplier circuit also known as an Amplified Diode or Adjustable Diode is a useful circuit that allows you to set a user desired voltage drop without using a series combination of diodes or zeners. This video describes and demonstrates how this circuit works and shows a few applications where it is used. It is commonly used to set the bias on a low-impedance push-pull output stage of an amplifier. All transistors shows are typical general purpose devices like the 2N3904/2N3906. The scope is being used as a"
YouTube Link 2015-03-19T18:52Z 226K followers, 85.5K engagements
"#74: Basics of Differential Probes for Oscilloscopes and their applications: a tutorial This video gives the basics of differential oscilloscope probes. It defines what they are and discusses why and how they are typically used. A few examples of typical applications for diff-probes are given. W2AEW Tek Tektronix oscilloscope scope probe differential ground float floating common mode mode rejection noise ratio flexray ethernet usb audio balanced bridge driver SMPS switching power FET inverter data serial tutorial W2AEW Tek Tektronix oscilloscope scope probe differential ground float floating"
YouTube Link 2013-01-14T03:52Z 226K followers, 89.9K engagements
"#60: Basics of Phase Locked Loop Circuits and Frequency Synthesis This tutorial style video presents the basics of Phase Locked Loop circuits. A basic block diagram of a PLL is shown and the individual blocks are discussed. The Voltage Controlled Oscillator (VCO) is described and demonstrated. The two basic types of Phase Comparators/Detectors often referred to as Type I and Type II are described and demonstrated. Then the overall operation of the PLL is demonstrated. The addition of a simple divide-by-2 is shown and how this is used to double the output frequency of the VCO the basis for"
YouTube Link 2012-08-31T20:29Z 226K followers, 282.7K engagements
"#273: Common Emitter Amplifier Design Tips & Shortcuts This video provides some basic design tips and shortcuts for the Common Emitter Class A Amplifier. The considerations for selection of the DC Bias point are presented as well as some tips on how to set/compute the gain for both degenerated and high-gain configurations. Below you will find links for related videos and for a PDF copy of the notes used in this video: #185: BJT Bias and Beta Dependence: https://www.youtube.com/watchv=YQlbPGNB-ys #113: Bias point and Class of operation: https://www.youtube.com/watchv=c6cmkm3UPUI #114: Common"
YouTube Link 2017-11-29T23:12Z 226K followers, 134.9K engagements
"#118: Basics of PIN diodes and their use in RF switch applications This is a basic tutorial on PIN Diodes with some examples of how they are used in RF switch applications. I previously published a video that introduced the topic of how diodes can be used as switches: http://www.youtube.com/watchv=YBNIq_d56sA This video takes this a step further discussing the unique characteristics of PIN diodes and how these characteristics are used for switching large RF signals. The unique ability to have the resistance of the diode be adjusted by changing the bias current can be used for other"
YouTube Link 2013-11-09T02:52Z 226K followers, 135.3K engagements
"#82: How to use a Diode as a Switch / Diodes as Switches / Basics of Diode Switches This video answers a lot of questions about how diodes can be used to switch AC / RF signals. A lot of questions were asked about this after my last two videos which reviewed the schematics of a couple of QRP transceivers. These transceivers used a lot of diode switching. This video shows the basics of small signal switching with diodes and also discusses large signal switching with PIN diodes. W2AEW Tek Tektronix RF diode diodes PIN PIN diode switch attenuator modulator radio QRP Heathkit MFJ transceiver"
YouTube Link 2013-02-28T00:45Z 226K followers, 130.2K engagements
"#52: Tutorial / Basics of a Dip Meter This video presents the basics of a Solid State Dip Meter which is the more "modern" equivalent of the old classic Grid Dip Meter (GDO). The GDO was simply a vacuum tube based oscillator with a meter that read grid current as a measure of the oscillation strength/magnitude. The solid state dip meter uses a solid state RF oscillator and detector circuit to perform the same function. The Dip Meter (or Dipper) I show in the video is a Heathkit HD-1250 that I built as a kid in [----] or '77. The dipper is mainly used to determine or measure the resonant"
YouTube Link 2012-07-06T02:58Z 226K followers, 104K engagements
"#153: How to tune up a Kenwood TS-830S hybrid rig / transceiver TS-520 TS-530 TS-820 A quick video showing the proper procedure to quickly tune up the transmitter on a Kenwood hybrid rig like the TS-830S TS-820S TS-530S TS-520S etc. using the DRIVE PLATE LOAD CAR and MIC gain controls. As always you should tune up into a dummy load if available. Also be sure to limit the transmit time while tuning to about [--] seconds or less. This is based on the user manual and the excellent how-to guide offered on Terry K9TW's website http://www.k9tw.com. Of course this video assumes that the rig is in"
YouTube Link 2014-06-06T04:11Z 226K followers, 113.1K engagements
"#234: Basics of Near Field RF Probes E-Field & H-Field How-to use Near Field RF probes can be very helpful when tracking down sources of unwanted RF emissions or radiation. This video presents the basics of the E-Field and H-Field probes how they work and how to use them. Here are some useful links on near field probing including plans and discussions on how to make your own near field probes: My show notes pages: http://www.qsl.net/w2aew/youtube/NearFieldProbes.pdf Good thread on EEVBlog: http://www.eevblog.com/forum/projects/diy-magentic-field-probes/ Easy to build H-field probe:"
YouTube Link 2016-03-26T21:08Z 226K followers, 111.9K engagements
"#375: Ham Radio Quickie: Ground Radial wires vs. the "Magic Carpet" Faraday cloth Just a quick video to document my quick comparison of portable vertical antenna VSWR sweeps using my ground radials vs. a conductive fabric mat often called a "magic carpet". Note that these results are specific to my antenna configuration your results may vary. I kept "everything" constant/unchanged between the two configurations to get an apples-to-apples comparison"
YouTube Link 2023-10-31T01:23Z 226K followers, 37.3K engagements
"#170: Basics of IQ Signals and IQ modulation & demodulation - A tutorial This video presents an introductory tutorial on IQ signals - their definition and some of the ways that they are used to both create / generate modulated RF signals and demodulate / analyze RF signals. IQ signals are most often used in the transmit and receive paths of Software Define Radios (SDR). A PDF of the drawings can be found here: http://www.qsl.net/w/w2aew//youtube/Basics_IQ_signals_modulation.pdf Here's a recent blog post (not mine) that also explains this quite clearly:"
YouTube Link 2014-09-03T00:49Z 226K followers, 581.4K engagements
"#326: How to Measure the impedance of "unknown" coax using a NanoVNA This short tutorial video shows how to use the NanoVNA to measure the impedance of an unmarked piece of coax transmission line. It uses the unique impedance transformation that occurs with a quarter-wavelength transmission line. By measuring the resistive component of the line at a frequency at which the line is a quarter-wavelength long the unknown line impedance is simply the square root of the product of the termination impedance and the measured value. See this playlist of additional tutorials using the NanoVNA:"
YouTube Link 2021-01-04T02:30Z 226K followers, 75.7K engagements
"#1: QRP Check-in to NorCars net from RVRC Hamfest June [------] Check-in to NorCars 40m net on June [--] [----] from the Raritan Valley Hamfest in Piscataway NJ. Rig is an Icom IC-703+ running off of a 7AH gel-cell into a SuperAntenna MP-1 with an extended 10' whip section. Power is less than 10W-PEP. Note that the net control station K1AJD is in New Hampshire not Vermont as I stated in the video - oops FILE0011 FILE0011"
YouTube Link 2010-10-14T18:17Z 226K followers, 22K engagements
"#408: Distortion using Class A B AB and C amplifier types (by request) This video is by request of a viewer of my video on Class A B AB and C types of amplifiers. He asked what the distortion looked like using the FFT on the scope. The original video on the details of the various operating classes of amplifiers can be found here: https://youtu.be/c6cmkm3UPUI In this video we look at the distortion on the FFT as well as a quick Total Harmonic Distortion (THD) measurement. I also show a simple resonant load and how it is used to reduce the distortion of the Class AB B and C amplifier states."
YouTube Link 2026-01-22T04:35Z 226K followers, 16.4K engagements
"#140: Basics of an Op Amp Summing Amplifier A tutorial on the basics of an inverting and non-inverting summing amplifier using an op amp. The video assumes a basic knowledge of how inverting and non-inverting amplifiers using op amps work. If you are unfamiliar with this I'd recommend viewing my video on how to easily understand the operation of most opamp circuits: http://www.youtube.com/watchv=K03Rom3Cs28 or Dave Jones (EEVBlog)'s video on op amp basics: http://www.youtube.com/watchv=7FYHt5XviKc The theory is presented and measurements are made on the bench using the same circuit"
YouTube Link 2014-04-14T05:07Z 226K followers, 73.6K engagements
"#124: How to install an RJ45 connector on a CAT5 Ethernet network Patch Cable - DIY Repair A quick video to show how to install a new RJ45 connector on a CAT5/CAT5e Ethernet or network cable to make a new patch cord or repair a broken connector. All it takes is a little patience and a few tools. It pays to have the right tools to install the connector and test the cable afterwards. The cost of the tools can often be recovered after making or repairing just a few cables. W2AEW Tek Tektronix Ethernet (Invention) Category [--] Cable (Invention) Patch Cable Electrical Connector Technology How-to"
YouTube Link 2014-01-06T22:45Z 226K followers, 868.1K engagements
"#284: Basics of RF Bias Tees including applications and examples Bias Tees are RF components that are used whenever you need to couple a DC power or low-speed control signal onto an RF signal path. This video discusses the basics of Bias Tees how they work examples of practical construction and a few lab application examples showing them "in action". Links for the Bias Tees used in this video as well as a copy of the video notes are here: https://www.minicircuits.com/pdfs/ZFBT-4R2GW+.pdf https://www.minicircuits.com/pdfs/ZX85-12G+.pdf http://www.dorkage.com/youtube/Basics_of_Bias_Tees.pdf"
YouTube Link 2018-06-20T15:49Z 226K followers, 71K engagements
"#193: Back to Basics: the differential amplifier aka long-tailed pair diff-pair Back to basics introduction to the differential amplifier aka the diff-pair long-tailed pair emitter coupled pair etc. The basic operation of the circuit is presented along with a simple mechanical simulation. Also how the addition of current sources and mirrors can be used to address some of the performance issues and begin to form the rudimentary beginnings of an op amp. This is the follow-up video from "teaser" video published earlier. Teaser video: http://www.youtube.com/watchv=zhM3rPHFgt4 Video note pages:"
YouTube Link 2015-01-31T16:18Z 226K followers, 146.9K engagements
"#329: Presentation recording: Intro to the VNA and NanoVNA for BayCon [----] This is a recording of my presentation on the Basics of a VNAs and the NanoVNA that was prepared for the Bay-Net.org annual BayCon [----] Virtual Conference. It covers the basics of a vector network analyzer and the NanoVNA. This is a bit more formal presentation of material that can be found in several of my other NanoVNA videos on this channel. Website for Bay-Net: http://www.bay-net.org/ Full recorded livestream from BayCon 2021: https://www.youtube.com/watchv=AJGhu8r7cYU W2AEW Tek Tektronix NanoVNA how-to tutorial"
YouTube Link 2021-02-07T05:02Z 226K followers, 55.3K engagements
"#219: Back to Basics: Introduction to Field Effect Transistors JFET MOSFET A basic introduction to the Field Effect Transistor (FET). This includes a basic description of the Junction FET (JFET) and the Metal Oxide FET (MOSFET) and also discusses N-Channel vs. P-Channel as well as Depletion Mode and Enhancement Mode type devices. The function of the Gate Source and Drain terminals are reviewed. The linear region and saturation region of operation of the devices is described and demonstrated. In a short video like this it is impossible to get into depth in any application - the intent with"
YouTube Link 2015-11-29T16:27Z 226K followers, 185.7K engagements
"#206: Importance of 10X Probe Compensation with your Oscilloscope This video discusses the importance of proper 10x probe compensation and what can happen if the probe is not properly compensated. Also it reviews why a very high frequency probe paired with a much lower BW scope might actually give you worse frequency response than a lower bandwidth probe. If you are interested in a deeper background on the Basics of 10X Probes please see this video: https://www.youtube.com/watchv=SX4HGNWBe5M The notes page from this video can be found here:"
YouTube Link 2015-07-07T23:37Z 226K followers, 42.7K engagements
"#338: Probe Tips: Beware of capacitive loading of oscilloscope probes on your circuit operation The capacitive loading of your oscilloscope probe might affect the operation of your circuit - certainly something to keep in mind when probing around. The test circuit used in this video is shown at 11:08 in this video: https://www.youtube.com/watchv=G9zZRNzhsEE&t=668s .and I'm probing across Cs in the lower left corner of the schematic. 1X passive probe can have 100pF or more of capacitive loading which can dramatically affect many circuits. 10X probes are typically 8-15pF or so with some"
YouTube Link 2021-10-06T03:01Z 226K followers, 27.3K engagements
"#377: How to install a crimp-on BNC connector to RG-8X coax cable This video shows how to install a crimp-on type BNC male connector onto RG-8X coax cable. The connector shown is available from Max-Gain Systems. The specific connector used here can be found at: https://mgs4u.com/product/bnc-male-crimp-connector-for-0-240-inch-od-coax-7005-bnc-8x/ The installation guide datasheet etc. can all be found on this page as well. W2AEW Tek Tektronix coax how-to crimp connector BNC W2AEW Tek Tektronix coax how-to crimp connector BNC"
YouTube Link 2023-11-30T02:31Z 226K followers, 34.8K engagements
"#400: Measuring the Minimum Discernable Signal and bandwidth of the 40m Direct Conversion receiver. This video shows the measurement of the Minimum Discernable Signal level (MDS) of the Soldersmoke Challenge Direct Conversion 40m receiver - which is a decent measurement of the sensitivity. I also show the measurement of the receiver bandwidth and then use that to "correct" the MDS value so that it can be basically compared to the standard measurement of MDS which uses a 500Hz receiver BW. More information on the receiver I'm testing see video #398 and the notes shown for that video:"
YouTube Link 2025-06-28T15:22Z 226K followers, 14.6K engagements
"#235: Basics of Analog Panel Meters Analog meter movements D'Arsonval This video covers the basics of analog panel meter movements how they work how to test and characterize them and even how to modify the face for your custom application. These meters can be found on the surplus and ham/hobby market and can make nice enhancements for projects you might be working on. Here is a link to the custom meter scale software: http://www.tonnesoftware.com/meter2.html A copy of the notes page from this video can be found here: http://www.qsl.net/w2aew/youtube/AnalogPanelMeters.pdf W2AEW Tek Tektronix"
YouTube Link 2016-04-09T22:58Z 226K followers, 119.7K engagements
"#313: Why a VNA needs to be calibrated how to calibrate a nanoVNA This video describes why a "user" calibration is needed when using a VNA (vector network analyzer) what systematic errors it corrects for what is meant by a measurement plane or calibration plane and finally an example of how the calibration is performed on a nanoVNA. Note from this video can be found here: http://www.qsl.net/w2aew/youtube/why_calibrate_a_VNA.pdf W2AEW Tek Tektronix nanoVNA VNA vector network analyzer network analyzer RF calibration tutorial how-to SWR VSWR return loss reflection coefficient S parameters S11"
YouTube Link 2020-06-13T03:51Z 226K followers, 84.3K engagements
"#86: Improved NTSC video to Oscilloscope converter circuit / scope video monitor hack This video is a follow-up from a video I posted in May [----] which showed a simple circuit that converts an NTSC video signal into the X and Y scan voltages and Z-input drive signals to make the oscilloscope into a simple monochrome video monitor. The circuit shown in that video had a couple of short comings and limitations. This video shows some improvements to that circuit which improve the video quality the brightness and contrast control as well as the ability to work with some additional oscilloscopes."
YouTube Link 2013-04-09T02:18Z 226K followers, 40K engagements
"#114: Tutorial: Common Emitter Common Collector and Common Base Transistor amplifiers Back to Basics tutorial on the fundamentals of the three bipolar transistor amplifier topologies. The basic configuration and characteristics of each type of amplifier are discussed and demonstrated. This video does not provide detailed design instruction but rather just a basic introduction to each type their basic characteristics and applications and demonstrations of their operation. A copy of the video drawings can be found here: http://www.qsl.net/w/w2aew//youtube/Common_Emitter_CC_CB_amplifiers.pdf"
YouTube Link 2013-10-09T03:31Z 226K followers, 240K engagements
"#409: Ham Radio: POTA go-kit using a Hidden Woodsman M55 Haversack for the Elecraft KX2 This video shows a go-kit I put together for my Parks On The Air (POTA) amateur radio field operations. It uses a M55 Haversack from Hidden Woodsman. I need to blame/thank my good friend Thomas K4SWL for introducing me to this pack in his blog and video: https://qrper.com/2026/01/hidden-woodsmen-haversack-first-pota-test-of-my-new-ft-818-field-kit/ https://youtu.be/bshcVL7XZYk This bag can be purchased here: https://thehiddenwoodsmen.com/product/m55-haversack/ w2aew Tek Tektronix M55 Haversack POTA parks"
YouTube Link 2026-02-01T21:50Z 226K followers, [----] engagements
"#408: Distortion using Class A B AB and C amplifier types (by request) This video is by request of a viewer of my video on Class A B AB and C types of amplifiers. He asked what the distortion looked like using the FFT on the scope. The original video on the details of the various operating classes of amplifiers can be found here: https://youtu.be/c6cmkm3UPUI In this video we look at the distortion on the FFT as well as a quick Total Harmonic Distortion (THD) measurement. I also show a simple resonant load and how it is used to reduce the distortion of the Class AB B and C amplifier states."
YouTube Link 2026-01-22T04:35Z 226K followers, 16.4K engagements
"#407: Installation of Yaesu optional 500Hz Collins Mechanical Filter in the FT-857D This video shows the simple installation of the optional Collins Mechanical Filter in the Yaesu FT-857D transceiver. Yaesu offered three different optional filters - the YF-122S 2.3kHz filter for SSB (single sideband) the YF-122C 500Hz filter for CW and the YF-122CN 300Hz CW filter. The video shows the 500Hz CW filter and then verifies it's operation while listening to several CW signals. w2aew tek tektronix yaesu ft-857d ham radio transciever filter collins mechanical CW morse code SSB w2aew tek tektronix"
YouTube Link 2026-01-16T21:48Z 226K followers, [----] engagements
"#406: Current Regulator/Limiting Diodes (JFET) and their applications Current Regulator diodes also known as Current Limiting diodes are really JFET devices that provide a constant current for a variety of applications. My videos on JFET current sources and the basics of JFET devices may be handy background videos for you: JFET current sources: https://youtu.be/XJadPFYWglQ JFET Basics: https://youtu.be/oambDFa0Pr8 Several applications are shown - including linear ramp generation capacitor measurement current mirrors relaxation oscillator and differential amplifier gain stabilization. One of"
YouTube Link 2025-12-29T06:39Z 226K followers, 17K engagements
"#405: Using TinySA Ultra to measure keyer speed of a Kenwood TS-890S transceiver This video shows how to measure the keyer speed of a CW transmitter using a TinySA Ultra in Zero Span mode with a trigger. The formulas are simple: WPM = 1.2/unit_length and unit_length = 1.2/WPM .where: WPM = Words Per Minute unit_length = time duration of a "dit" The rig is a Kenwood TS-890S and the measurement verified that the WPM setting is accurate (unlike some rigs shown in my previous video linked below) Previous video detailing keyer speed measurements (#378): https://youtu.be/SvXelAaDPfI w2aew tek"
YouTube Link 2025-12-13T18:20Z 226K followers, 32.2K engagements
"#405: The CurveBug - a dual octopus style debugging tool from VintageTEK The CurveBug is a debugging / troubleshooting 2-terminal curve-tracer tool developed by VintageTEK to benefit their non-profit operations. The function of the CurveBug is very similar to the well-known "octopus" tester - which is a highly simplified version of the Huntron Tracker. I did a video on the Octopus that has been viewed over [------] times: https://youtu.be/Gwo3pEH7hUE The CurveBug has two curve-tracer "channels" allowing you to simultaneously probe two circuits (one suspect one known good) to look for"
YouTube Link 2025-11-10T23:22Z 226K followers, 11K engagements
"#404: The VFET is a JFET that thinks it is a Triode vacuum tube - aka Static Induction Transistor This video is a quick introduction to the Static Induction Transistor also known as a Vertical FET or VFET. This device is a JFET that behaves like a vacuum tube Triode. You may want to refresh yourself on what a Junction Field Effect Transistor (JFET) is and it's characteristics by reviewing this video: https://youtu.be/oambDFa0Pr8 Here is a really nice writeup on these devices from an audio applications perspective: https://fromvinyltoplastic.com/what-are-static-induction-transistors-sit/ The"
YouTube Link 2025-10-24T01:56Z 226K followers, 17.7K engagements
"#403: Measuring a Directional Coupler with a SV4401A VNA This video shows the process of setting up calibrating and using a SV4401A Vector Network Analyzer to characterize the Return Loss (Reflection Coefficient) VSWR Mainline Loss (Transmission Coeff) Coupling Ratio and Directivity of a Mini-Circuit ZFDC-20-5+ directional coupler over a 100kHz to 2GHz frequency range. 00:00 Introduction 00:28 Review of Measurements of a Directional Coupler 02:14 Specifications of the Mini Circuit ZFDC-20-5+ 03:53 Setup VNA Frequency Range 04:17 Calibration Considerations 05:17 Calibration Process 07:00 Setup"
YouTube Link 2025-09-10T03:41Z 226K followers, [----] engagements
"#402: Overview of the Sysjoint SV4401A Vector Network Analyzer from Chelegance This video provides an overview / introduction to the Sysjoint SV4401A 4.4GHz VNA offered by Chelegance. It provides an overview of the features and simple menu structure of the unit. More info specifications documentation and distributors can be found on the Chelegance site linked below: https://chelegance.com/products/sv4401a-4-4g-vna-with-7-capacitive-touchscreen/ w2aew tek Tektronix vna nanovna network analyzer vector network analyzer ss4401a sysjoint chelegance introduction w2aew tek Tektronix vna nanovna"
YouTube Link 2025-08-23T04:43Z 226K followers, 14.6K engagements
"#401: Tool Time: What is a Wiggy Ans: A Solenoid-type Voltage Tester Taking a bit of a departure from electronics - this video introduces a tool that is very popular with electricians - the Wiggy a solenoid-type AC/DC voltage tester with some very interesting features and characteristics. W2AEW Tek Tektronix Square D Wiggy AC DC voltage tester W2AEW Tek Tektronix Square D Wiggy AC DC voltage tester"
YouTube Link 2025-07-13T02:41Z 226K followers, 12.2K engagements
"#400: Measuring the Minimum Discernable Signal and bandwidth of the 40m Direct Conversion receiver. This video shows the measurement of the Minimum Discernable Signal level (MDS) of the Soldersmoke Challenge Direct Conversion 40m receiver - which is a decent measurement of the sensitivity. I also show the measurement of the receiver bandwidth and then use that to "correct" the MDS value so that it can be basically compared to the standard measurement of MDS which uses a 500Hz receiver BW. More information on the receiver I'm testing see video #398 and the notes shown for that video:"
YouTube Link 2025-06-28T15:22Z 226K followers, 14.6K engagements
"#399: Review: 3D-printed Straight-key with a great story - by the HamRadioDuo This 3D printed straight-key by Mike (N4FFF) and Becky (N4BKY) inspired by the J-38 has a great story and mission behind it - take a look at the video. For more information see the links below: Where to get the key: https://shop.hamradioduo.com/ HamRadioDuo Youtube channel: https://www.youtube.com/@HamRadioDuo Their tools page on website: https://www.hamradioduo.com/tools/ The main HamRadioDuo webpage: https://www.hamradioduo.com W2AEW Tek Tektronix ham radio morse code straight key W2AEW Tek Tektronix ham radio"
YouTube Link 2025-06-13T13:40Z 226K followers, [----] engagements
"#398: My build of the SolderSmoke Challenge Direct Conversion Receiver for 40m This video introduces my build of the 40m direct conversion receiver that was conceived by the fine folks on the SolderSmoke blog and podcast. This is a fun project to make a simple [--] transistor receiver (for AM SSB and CW) for the [--] meter amateur radio band (7.0 to 7.3MHz). Included below are several links with more information on this project: Intro video to the DCR Challenge Project from SolderSmoke's YT channel: https://www.youtube.com/watchv=rLjxU2rMeXw There are detailed videos on each functional block of"
YouTube Link 2025-06-01T17:09Z 226K followers, 18.6K engagements
"#397: How to use cursors on Tektronix [----] series scopes including some "secret" features This video shows how to use the cursors on the Tektronix [----] series oscilloscopes such as the [----] [----] and [----]. Basic cursor functions for measuring voltage time and frequency are covered as well as the lesser known features to measure amplitude ratios duty cycle and phase. W2AEW Tek Tektronix oscilloscope scope tutorial how to cursors voltage time frequency ratio phase W2AEW Tek Tektronix oscilloscope scope tutorial how to cursors voltage time frequency ratio phase"
YouTube Link 2025-03-08T22:53Z 226K followers, 10.5K engagements
"#396: Demystifying Oscilloscope Triggering - what it does and how to use it This video discusses the basic function of triggering on both analog and digital oscilloscopes. It discusses what the end goal is the differences in the underlying operation of the triggering function in analog and digital scopes and how to setup a the most basic (and most common) trigger - a simple edge trigger. Links to other Oscilloscope Trigger video are listed below as well as a link to the PDF file of the notes from this video. Notes from this video: http://www.qsl.net/w2aew/youtube/DemystifyTriggering.pdf Basic"
YouTube Link 2025-02-21T03:51Z 226K followers, 29.9K engagements
"#395: Easy to make ground-radial kit for portable radio operations using ribbon cable This video shows the ground radial (counterpoise) kit that I make from ribbon cable for my portable vertical antenna deployments during Parks on the Air (POTA) and other temporary/portable radio operations. W2AEW Tek Tektronix POTA ground radial antenna vertical antenna magic carpet counterpoise W2AEW Tek Tektronix POTA ground radial antenna vertical antenna magic carpet counterpoise"
YouTube Link 2024-12-30T04:13Z 226K followers, 17.1K engagements
"#394: Oscilloscope Best Practices - some of the most common issues and tips This video is a brief reminder of some of the most common considerations to optimize your measurements and signal / waveform fidelity with your oscilloscope. Each of the "tips" is briefly discussed. I have videos on many of these tips individually linked here: 10X probe tutorial: https://youtu.be/SX4HGNWBe5M Capacitive Loading of Probes: https://youtu.be/sPSJnj7gVJA 10X Probe Selection: https://youtu.be/2qLd_Y2EpNs Importance of Probe Compensation: https://youtu.be/oxJQr4dKnys Probe Ground Lead Length:"
YouTube Link 2024-12-16T01:31Z 226K followers, 39K engagements
"#393: Analysis of the RF characteristics of the Baofeng UV-5R Dual Band HT This video takes a quick look at the RF transmitter performance of the Baofeng UV-5R Dual Band transceiver. It takes a look at the RF harmonic emissions the transient key-up characteristics the CTCSS performance and a look at some unusual higher frequency FM content. W2AEW Tek Tektronix amateur radio HT Baofeng UV-5R harmonics PL tone CTCSS transceiver measurements W2AEW Tek Tektronix amateur radio HT Baofeng UV-5R harmonics PL tone CTCSS transceiver measurements"
YouTube Link 2024-10-10T01:57Z 226K followers, 18.4K engagements
"#392: Schematic Basics: Multi-position switches in Simpson [---] VOM and Realistic DX-160 Receiver This video describes how to read and interpret the operation of multi-wafer multi-position switches that are commonly found in older electronics (before electronic switching of everything). Two different graphic representation of these switches are shown and described using the schematic for a Simpson [---] Model [--] VOM and a Realistic 5-Band Shortwave Receiver. w2aew Tek Tektronix Simpson [---] schematic realistic dx-160 switches wafer w2aew Tek Tektronix Simpson [---] schematic realistic dx-160"
YouTube Link 2024-09-28T03:34Z 226K followers, [----] engagements
"#391: POTA: First POTA activation with the CFT1 5-Band CW transceiver kit First Parks on the Air (POTA) activation using the new CFT1 5-band cw transceiver kit by KM4CFT. Band conditions were not great so it took about [--] minutes to get [--] contacts. You can get your own CFT1 here: https://hamgadgets.com/cft1-by-km4cft.html Build - Adjust - Align video here: https://youtu.be/vWbe1qQJ1Sk W2AEW Tek Tektronix POTA CW ham radio W2AEW Tek Tektronix POTA CW ham radio"
YouTube Link 2024-09-17T01:30Z 226K followers, [----] engagements
"#390 Kit Build: CFT1 5-band CW Field Transceiver - build / adjust / align / test (this is an update of video #389 which had an error in it) This video shows the process of building and adjusting/aligning the CFT1 5-band CW portable transceiver. It includes tips on assembly and soldering as well as details on winding toroids (optional pre-wound available) and the final adjustment/alignment process. Here are the "chapters" of this video: 00:00 Introduction to the CFT1 00:47 Kit components 02:03 Prep / de-burn the circuit boards 02:39 Axial inductor installation 03:27 Ceramic capacitor"
YouTube Link 2024-09-16T20:31Z 226K followers, [----] engagements
"#388: Build tune and test a trapped 20/30/40m End Fed Half Wave antenna This "part 2" video summarizes the build tune and test of a trapped EFHW antenna for the [--] [--] and 40m amateur radio bands. My previous video: https://youtu.be/KIEZmwB8AHwsi=yKC6pJmZ0JXx9kQe .shows the process of building and tuning the low power / QRP traps that I purchased in kit form from N7KOM. See additional links in the previous video for details. My resulting wire lengths were: UNUN to 20m trap: 30'-2.5" (about 9.21m) 20m to 30m trap: 4'-7.5" (about 1.41m) 30m trap to end: 8'-6" (about 2.59m) W2AEW Tek Tektronix"
YouTube Link 2024-07-06T21:01Z 226K followers, 15.7K engagements
"#387: How to build and tune traps for a multi-band End Fed Half Wave (EFHW) antenna This video shows how to build traps for a 40/30/20m EFHW antenna using a nice kit from N7KOM. We start with the intro into why I am doing this how to wind the toroids then how to setup and test the resonant frequency of the trap. Methods for adjusting the toroidal inductor are shown in order to move the resonant frequency to the desired point. An antenna analyzer like a RigExpert is used to test for resonance. I also how how a Dip Meter and Frequency Counter can be used to check the resonant frequency as well."
YouTube Link 2024-07-01T04:06Z 226K followers, 17.6K engagements
"#386: Build the Iambic "pressure" paddle from VK3IL This short video presents the VK3IL Pressure Paddle - a lightweight portable paddle for your amateur radio's iambic keyer (for CW / Morse Code). This paddle is perfect for the portable POTA and SOTA operator as it is small and uses no moving parts. The author's blog page for this project can be found here: https://vk3il.net/pressure-paddle-v2/ The link to order the exact board I used here is: https://oshpark.com/shared_projects/ch6BPBtL Here's the link for the longer version of the board: https://oshpark.com/shared_projects/zdbRih8h The list"
YouTube Link 2024-06-01T02:35Z 226K followers, 11.4K engagements
"#385: How to quickly tune the Penntek TR-45L Z-match tuner This short video shows how to quickly adjust the Z-match tuner in the Penntek TR-45L by slightly "overshooting" the null which each knob adjustment. Of course you want to finish up with the deepest null possible (little to now REV power deflection). This technique helps you get close to this point quickly - then finish up at the lowest possible REV power. W2AEW Tek Tektronix Penntek TR-45L Tr45L tuner z-match how to W2AEW Tek Tektronix Penntek TR-45L Tr45L tuner z-match how to"
YouTube Link 2024-04-22T22:56Z 226K followers, [----] engagements
"#384: What is the bandwidth of a CW / Morse code signal (as a function of speed and rise/fall time) The occupied bandwidth (OBW) of a CW / Morse code signal is primarily dependent upon the keying speed (Words per minute / WPM) and the rise/fall time of the RF envelope. Radios and operator practice give you control over the WPM but not many radios give you control over the RF rise and fall time (which can have a major effect). This video shows measurements of the Occupied BW at various keyer speeds and RF rise/fall times. Equipment used in this video include: Tektronix MSO44B oscilloscope:"
YouTube Link 2024-03-28T01:41Z 226K followers, 19.8K engagements
"#383: Measuring AM Modulation Depth using an Analog Oscilloscope (followup from #382) This is a followup from video #382 where I demonstrate how to measure Am modulation depth using a digital oscilloscope. In this video we take a look at how to perform the measurement with an older analog scope (Tektronix 485). Additionally the measurements will be performed on low-cost RF signal generators. Here is a link to the previous video: https://youtu.be/-D-hkFkCH7Isi=zAfmYw0BeVA9Ar7G W2AEW Tek Tektronix oscilloscope scope how to tutorial AM modulation measurement analog trigger [---] W2AEW Tek"
YouTube Link 2024-03-06T01:50Z 226K followers, 15.7K engagements
"#382: Measuring AM modulation depth/percentage with a digital oscilloscope This video shows how to measure the modulation index/percentage of an AM (amplitude modulated) RF carrier. The basics of the calculations are shown as well as techniques for setting up the scope to get a high quality waveform for the measurement. Notes for the video can be found here: http://www.qsl.net/w2aew/youtube/AMmeasurement.pdf Related videos: https://youtu.be/i29pI7okLe4si=0zx-4RscFinQ21rT https://youtu.be/0Kk_N_TpDeosi=i_Rqp7_pMLldRHbt W2AEW Tek Tektronix AM modulation measurement oscilloscope scope how-to"
YouTube Link 2024-03-02T04:24Z 226K followers, 22.8K engagements
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