This is probably one of the best channels to learn and enjoy electronics. Thanks

You are a real class act, Alan. I recently found your channel and wanted to thank you for your work over the years. The format, presentation, and demonstrations provide a well-rounded understanding of the topic. Your work should be made into a collection and preserved in the Library of Congress.

What I find unique about this channel is that it's: Very clear, Concise, Precise, Straight to the point, Addressing all the practical aspects of a certain subject & most importantly it makes me enthusiastic enough to keep delving more into the bits & bobs. Much appreciation for the time & effort & Cheers from Egypt.

This is one of the most interesting electronics channels on KZfaq. You have great content.

Hi Alan, Thanks for your great contribution to the video world of knowledge. Cheers, Martin.

Alan, the wiring instructions you gave me worked like a champ. I can't thank you enough. I've been trying to get some help with this for about 2 weeks and your the first one that got it right the first time. Thanks again and 73's. KD5JNE Pat

I've been subscribed for a couple years now. Probably one of the best thought out electronics oriented channels I am subscribed to, along with AllAmericanFiveRadio. You don't try to get cute or entertaining (well, in a pop culture sense anyhow, I find channels like this entertaining because this is what I am in to). Just straightforward instruction. Keep up the good work!!

The trailer video is utterly creepy and hilarious at the same time. I'm waiting for the opening titles - "Fringe - pilot episode", and your playing the part of Walter Bishop. Love it, very creative.

Splendid ! This is by far the most attractive intro video I've ever seen on youtube:) you just rock body :)

You have a true gift for explaining things in an easy-to-understand, intuitive manner. Great job! I'm curious whether you have a professional teaching background, given how well you explain complex concepts?

I'm a BIG fan since your early video postings. Quality instructional vids like yours are Godsend! Keep it up!

Really happy I found your videos, they are simply great. Thank you for all your hard work

"Liked 👍and subscribed "!

I can not believe how I missed you on KZfaq, how I never got over your channel on KZfaq. So great channel , yea I subbed just to not lose you now when I find you . Great channel, you do great job so yea I will stay around.

the best channel on KZfaq for us geeks. please keep up with the videos.

Just wanted to post a quick thanks for your excellent videos. Interesting projects, examples and very beginner friendly explanations. You are an excellent teacher and your efforts are very appreciated.

Great channel!!! I've been subscribed for a while now, and finally got my amateur radio license. I'm really enjoying studying for my extra and playing with antennas - radio is so fun, I'd love to see some RF stuff!

You have one of the best channels that I've found on KZfaq. I'm an electronics technician and ham operator, and your videos help me tremendously. I heard you on 17 meters yesterday ( I believe 18.113 ). I would have liked to have made a contact with you, but the band wasn't in very good shape for me, so I didn't try. Thanks for the great work you do with your channel.

Don't know if I've already done this on other of your videos, but.. thank you very much for this work! Really amazing. Regards

thanks great vidieo's have watched all of them

hello. good your video. thanks for your exp.

Cool. Thanks for the reply!

Awesome 👍

Sent by Andreas Spiess here. Really interesting looking content. Huge backlog for me :D

Thank you a most interesting youtube channel.You have an great way of explaining technology.

Alan thanks for producing a great channel with excellent content and amazing presentation.Your hand written notes and schematics are better than the information presented in most books now days.Would you consider doing a series of videos on "switch mode power supplies". They have become almost universal in all electronics with so many variations in design and quality.I will be watching whatever you decide to discuss.

for me as a student in avionics, W2aew and eevblog are the best channels on youtube

Allan, dude. I never knew! You live inside that scope? No wonder you know so much. Thanks. 🦸‍♂️

Hey...I thought I had you linked to my channel home page...but not...just added your channel...hope it helps and will make mention of your work in a video too. Cheers, Martin.

Alan just want to say your videos are both excellent in knowledge and quality of video...Not to mention your very cooperative...you'll have to excuse me if I'm posting on the wrong page for my topics...but a bit new on the u tube thing...Carl

So now I want to play video on my oscope screen!!!

Great channel Allen! You are a good teacher. How about a video on TRIACs and the brethren. I'm confused about min latching current, drive current & how to set this -- how these are different from bi-polars. And another vid about the 3 basic transistor amps, basically selecting a transistor & biasing it.

Best electroniks related channel on youtube. ( Omg ! : o Yes.)

I need and want to learn, learning is better then any drug out there.

Allen, Great videos. The last video on servo motors was very interesting. As a suggestion, how about a video on stepper motors? Thanks for all you do to help educate.

after a year, this is still a cool video using the scope as a monitor

Just discovered you channel and agree that it is the most informative electronics site I have found. 50 years after receiving my BSEE, your tutorials are bringing back long lost knowledge in a concise and understandable way. I am up to video 120 and thoroughly enjoy watching them. I am very interested in duplicating many of you basic electronic experiments. I have a good inventory of digital stuff, but very little analog. Can you suggest a list of analog components that would make up a good kit of parts for experimentation. Specifically op-amps, comparators, transistors, and diodes. It would also be useful if pdf's of your diagrams were available. Thanks for the great videos.

suggestions? DIY Plasma Arc Cutter would be nice. Like every episode subscriber, retired ET. Thank you, Tootles... Wade

hey Allen, nice trailer, I also like the old scope usage, cool. later mike

Hi Alan, I am an avid watcher of your videos, they have been immensely useful and enjoyable. May I politely suggest a video on measuring IMD on transmitters? With the popularity of low power home brew stuff like the Softrocks it would be good to be able to measure IMD both standalone and when connected to a small power amp. Plenty of theory on the web, not much practical instruction! Thanks, keep up the great work, your channel is appreciated by a BIG audience!

You tricked me, I thought the image was overlaid on an oscilloscope :) Respect!

I think it would be interesting to see you do a video on using PIC microcontrollers. just a thought.

Forgive me of you have already done this but a video about impedance would be great! Thanks

How did you get the video on the scope. Remembers me of repairing tvs way back. I will keep watching your video, watch out for anvillance of question.

One of the best Channels on KZfaq. I have a circuit that I have no idea on what it does, do you fancy taking a look at it to give me some idea?

It is like the sound of an old detuned tv.

Hi Alan, I am currently working with Beacon Flash lights and warning Bells. I would appreciate some video tutorials on Xenon lights and how the main cap discharge into it. Also some information on sound measurements as I am currently using sound level meter to measure a Bell sound in a range of 106-111 dB (tolerance -,3, +3 dB). Many thanks.

Hi Allen , I just talked to you on the 80 m band tonight , it was pleasure talking to you Joe from Allentown .

Nice video. Anything about controlling high frequency.

"Watching you watching W2AEW" :-)

Re. TRIACs and related: would be especially helpful to know how to test these devices (ie, will a DMM suffice? or is a test circuit required?)

Thank you Sir for all of your wonderful contents. I have a suggestion, which helps people like me, who are not electrical engineers. This is not my own idea. Ben Eater, started a series of videos about making a CPU. I learned about a lot from him. I was wondering if you can do similar thing in RF area, For instance making an bare bone oscilloscope, or spectrum analyzer, and along the way explain the concepts related to RF engineering. I can read these things in the book, but it will be easier to grasp if someone put them in a real projects. Thanks again,

And I thought that obtaining Lissajous figures was the most awesome thing you can do with a scope...

Hi, thank-you for the video tutorials. Can you please make a video tutorial about a wireless test set (250kHz - 999MHz) : for example IFR COM-120B. How to generate modulated signals and how to inject them in different parts of radio transceiver for troubleshooting .

How did you get such good video on the oscope? I've tried in the past and only got decent video, but that took me three scopes to do. One for vertical sawtooth waveform one for video amp (used for scope with non amplified intensity mod input) and one for both horizontal sawtooth and display.

Alan : A Suggestion. Would it be possible to take the paper notes from each of the videos and copy them as a PDF file and post a link to the File so we could add to our reference Library's? I know that would be extra work but otherwise I would have to pause the video and hand-scribe what I see on the screen. Thank-you.

haha this looks like from an 80's SciFi movie

Hello Alan, Would you please make a video showing how to measure the sensitivity of any radio receiver in a practical way and explain how to convert sensitivity to certain expression once interpreted in different forms like uV, uV/m , uV at (XX)db or uV at 50 ohm ..... etc I have encountered many ways of such expressions used by radio receivers manufacturers from portables, to high end communication receivers, and I'm really totally confused how to compare an apple to apple . Also many claimed that they have enhanced the sensitivity of their radios with certain modifications, is that possible technically and how to do that practically? Last point, what distinguish a radio receiver from another from reception point of view like sensitivity, selectivity ....etc and how to check these characteristics in the real life. Appreciating your efforts. Thanks Abd

I have watched a few of your videos and you have a major talent for electronics obviously. I recently purchased a 2215a as a total new B to oscilloscopes, bought for sine wave AC current household power. Wave compared to a generator wave do you have any recommended people for looking at my scope for proper tuning? Thanks JC

Hi Allen, not sure how to get a message to you but I'll try here. I wanted to request a video on the best way to test an old ignition coil on a small engine using a scope and or signal generator. Preferably both with mechanical breaker points and a more modern one with electronic ignition with the two transistors in a Darlington pair. Thanks, Bruce (K2XYZ)

Hi Alan, Replaced the fuse on the 475A/DM-44. New fuse also opened.So ii opened the black fuse box again , replaced the fuse w/ another, however this time I pulled out the white voltage selector plug, inspected it and plugged it back in the medium position 115 Volts.closed it up, turned it on , The scope turned on ?? running now 2 hours all seems well? Low line bulb flickered a bit in the beginning...gone now at 117 volts..Hope its ok...Carl Thanks N2MFW

Can you talk a little bit about JFET's?

I started a comment a bit ago and it disappeared before I was done, so if this is a duplicate I am sorry. I have a 2467b and the schematic shows the input fuse on the neutral leg of the power coming from the wall? I am use to putting the fuse on the hot side. Is this because it is either 120v or 230v or did they make a mistake on the schematic, BTW the scope is wired as the schematic shows. I know there is another mistake on the A3 Inverter Board. There are two Caps that are shown in the wrong location and if you follow the diagram you will get smoke. Luckly I changed one cap at a time and caught the problem, I then wrote the person who supplied the caps for my project, and he confirmed they were shown incorrectly. It would be easy to switch the wires around, but though I would ask someone with more savy than I have. Thanks, and keep up the good work, GR

Alan looks like i'm back in the same boat...Fuse went again after about 2 hours of running, just idling...Wonder if the white plastic voltage plug plays a role here?? Or worse, a filter cap in the power supply..I hope you don't mind but i sent you an e-mail , if you get a chance I would appreciate it very much if you read it and would get back to me on the info there....Thanks Very much Carl

you can play video through this oscilloscope, whaaaat?!

You never stop learning ! Dave - G6ZKC

Hi. Not the first time I ask you something. I finally bought an analog scope(Tek 2215A). It seems to be working ok. I had no problem to view some pwm stuff. But there's something annoying me. I can hear a continuous intense sound coming from the scope. It's a noise I hadn't noticed in scope videos. First, I thought it was due to the nature of the crt operation. But I think it is no harm to ask, since it isn't something I expected (maybe because of my inexperience). What do you think? Thanks

Are there any books you'd suggest for someone to get to learn more about radios and electronics? I know the ARRL puts out a number of books. I have no formal education in electronics but recently became interested in becoming licensed and wouldn't mind "tinkering" as well.

im uneducated and im curious about my motherboards which are very important to me and recently im buying used ones and ive noticed that they have a light that i assume means they have power and when their turned off the light goes out between 1-3 seconds on new boards and 1-3 minutes on used! this concerns me! they used SOLID capacitors not electrolytes. i assuming it because their capacitors have worn out and im concerned this could lead to complete failures and so im curious if they should be replaced and im researching this. you cant imagine what its like to turn something off and its still working!

Sir, are you the author of the book RF circuit design? Very good channel, thank you for the efforts...

Hi , im new around here , i would ask you if you do a tuturial about class A and A/B push-pull amp , a made my own push pull class A power amp based in the old vintage class A/B sanyo ja 116 , with some chances to give 30w rms power , biased with diodes and a trimpot , and with no equilazers, and it work very well , even without thermal tracking, because i used huge but very huge and thick heatsinks and only 2 output transistors each channel (mj15001/2). Sadly i dont own a osciloscop , you may say "hei, how do you know that it works well?" For instant, the sound its very clear ( dont fuzz around even with hi volume), realist, powerfull,dinamic , and can give you a slit very very thin distortion almost in the end of the volume , and it doen´t always do it , only in certain records. I know what im saying because i play in a band and i know what the natural sounds like. I make this project half guessing /half acknowledgement. So it would be very cool if you could a tuturial like this , to know if i miss passing anything , and ................we allways learning . Thanks , ah, sorry my english because im not american/english , im from europe. And thank you for your vids , its really trully learning.

hello I have a yaesu ft-890 I need a trimmer cap and alignment on the radio also the head phone jack needs to be fixed when i pull out the jack the speaker doesnt work please let me know if you can fix it thank you

haha how did you get in the box? ;D

Can you make a TV oscilloscope circuit

Hi w2aew. I work at a broadcast facility and we have airplane altimeter interference getting in to the C-band frequency range at 990Mhz L-band. I am tracking this interference using an Agilent 4407b spectrum analyzer. I am currently using max/min hold traces. I think there are interference spikes getting in to the carrier, but, they are low enough that they don't break the max hold trace. Do you know of any way that I can set up a spectrum analyzer to monitor under the carrier, possibly with something like a max hold with a base line of the noise floor under the carrier? Thank you.

Someone tell me how he put an image like that on an osiloscope I need to know

Well, my first preference would be to do a video with pretty dancing girls but if that is not available, How about a good video on the Smith Chart. I use the an online chart from time to time but I have not learned all of the applications and idiosyncrasy's yet. 73 or ---... ...-- WA4AOS