Best video that I have ever seen about the RF measurements. Thank you so much for your informative contents !!!

Your videos are excellent. I have a PhD in Physics and I'm a radioamateur. You should be awarded some kind of prize, especially for not turning everything to monetization and for the extreme clarity of your notes and explanations. Also, watching your videos makes one want to experiment, and I think this is the most important result you can get.

My wife of 33 years said if I buy a new Tek TTR506A VNA she is going to leave me. Boy, I’m going to miss her!

My wife is trying to find a w2aew rehab Centre for me. Your videos are addictive in brilliance and content. Excellently done..

Citing this video in the lab manual I'm making. This channel is a gem.

You break things down so well. This is the first time I've had S22 fully explained. Why can't people just say "reflection off of the output port?"

Subscribed. I salute how wonderfully White this engineer and teacher is.

I have no words about how seldom and useful videos like that about VNA! Thank you very much!!!

I watched this a while back and benefited from it's teaching, so just wanted to say thank-you!

Your videos are extremely good Alan and I look forward to every one. I'm glad you are providing some introductory content on VNA's - I'm just starting to venture more into them...Perfect timing!

Oh hell yeah! W2AEW talking about VNAs.

Excellent presentation, I was actually searching for vectorscopes and this came up, none the less this was time well spent.

Thank you. For making these videos for us! I still remember the first time I saw one and I was so happy to have some one to look to for help. You are a great friend to me.

Thank you for sharing your knowledge with us. I am pretty new to radio only being at it for about 6 months. I just got one of these and your video and notes are an amazing resource.

You're always educating me. I needed an overview of the VNA

Watching your videos always tells me how much I have yet to learn. I always glean usable info even if I don't grasp all of the subject. Thank you for sharing your knowledge.

Thank you so much for demystifying VNAs for me. I never knew what they really did as Google's explanation wasn't really helpful, as you pointed out. A great video as always. I know how much effort there is in turning out videos, the work you do is greatly appreciated!

Wow you made this video just in time. I was about to buy a NanoVNA to start getting into RF and this is exactly what I needed. Love your videos, thank you so much!

Very informative and timely. I just ordered a Nano VNA. Now waiting for more videos to show me how to use it!

This is the only channel I watch at half speed to ensure I don't miss anything!

Always invaluable info, looking forward to the next part in the VNA discussion... Cheers,

As always excellent explanation. Even I know what VNA is and also using it frequently is really nice to see some clear explanation of the basics behind.

Finally! Asked you for it some time ago (for I can understand your explanations best), and now it is here. Thank you sooo much!! You can't imagine how perfect the timing of this video is for me. Thank you, thank you, thank you!.

Alan, I love your Videos. I have many RF courses and I always love to share your videos with my classmates and they are always thankful. Our stuff is so dry, mathematical and without examples but your videos help us so much. Please stay healthy and save!

Excellent tutorials with theory and applications on the bench! I admire your test equipment collection as it is very high grade -- Tektronix and others and notably your very clear layout of contents on graph paper which is indicative of good engineering practices and communication skills in total. We would all love to have 100K budgets for pro grade gear but it is useless without the knowledge and training to make use of such instrumentation and how lower cost but useful devices that are affordable compare to "pro grade" instruments that are now very available. Your presentations are "classroom'" grade, instructive and a real service to elevate our desire to expand our knowledge and engineering practices!!! Many thanks!!

Another great educational video on VNA's and how technology and embedded circuits have now put very accurate test and measurement equipment affordably put the into the hands of almost anyone.

Great to find your channel. Ironically, I was chatting with a colleague recently about network analyzers and, voilà, this video popped up. Nice presentation.

Excellent! Congratulations!

Thanks so much for a VNA series. Got a bench full of aging Tek and HP equipment, never quite got my head around VNAs, but have been shopping a little; surplus lab VNAs are still awfully expensive in hobby terms. This will be most helpful!

Great Summary! I spent hours reading Tektronics manuals vs a succinct 17 minutes of your video to get the same information. Appreciate this :D

I love your explanation i didnt know how to use ut and when to, but explaining how it works now also allows me to fully understand and appreciate this awesome piece of machinery

Great overview! Looking forward to the followup video(s) with comparisons. 73s

Awesome video. And thanks for giving examples and your opinion on the existing VNAs on the market.

Know you're busy with work so thanks for taking the time to begin this VNA discussion. Stay safe! 73 - Dino KLØS

Thanks for that, looking forward to seeing your video on how to use a VNA! My school has some nice R&S ones but I wasn't too sure on how to use them.

Very well done, as you typically do. It is so refreshing to see a fellow ham that is truly an RF pro - getting scarce these days. I notice that in Raleigh, NC there exists a "Smith chart amateur radio society" - a club whose members must be able to demonstrate competence with the chart! My kind of club. 73 de W4NEQ.

well done sir, well done. I spent all of last year using signal generators, spectrum analyzers and Oscilloscopes running acceptance test procedures on electronic countermeasure systems. I did not have to use network analyzers but did look over the shoulder at the next test bench that was using one to troubleshoot some issues. Your video now helps me understand network analyzers enough to do my next assignment.

Your videos are very useful and detailed, keep up the good work!

I've been waiting for you really dig into this series!! thanks for sharing your knowledge

Excellent video presentation on VNA's It's one of those must have tools for RF work and play. I'm really surprised how well the NANO VNA measurements are so closed to the expensive VNA's like the HP 8753 and Agilent FieldFox units. For home use such as Amateur radio it's hard to beat that low cost for this type of RF tool. Thanks again for the video and looking forward to more .

Excellent introduction to how a VNA works! I purchased the NanoVNA last fall and really like all that can be done with this very inexpensive instrument for amateur radio. Thank you Alan!

Another item in the wishlist / cart. Thank you for the in-depth introduction.

Very informative video and very well explained. I highly appreciate your work. Thank you!

Thanks for the excellent presentation and explaining the basics

Best practical introduction to vna! Great demonstration. I've not understood need for two-port measurements for most all situations. Our "nano" versions do very well.

Wow great info that has been needed for years. Thanks. Keep em coming,

You make it easy to understand, thank you.

Very good explanation. Clear and understandable. You are good instructor. Thanks..

Great video, as always! I'll receive my nanoVNA in a few days, so I'm looking forward to learning how to use it and make measurements.

I'm Considering buying one of these. You helped to bring me up to speed with your explanation! 73's de KC2RDU

Great video, informative as always, looking forward to the future VNA vids!!

I bought a NanoVNA and it is amazing. It has allowed me to accurately measure inductors that i have wound ( many were quite off supposeded calculated value) as well as tune antennas easily. It has been worth every penny for sure.

Finally a series about VNAs ! Maybe I will finally understand what is lost in the "Return Loss"

Thanks for putting efforts in making these videos.

Thank you! Very informative. I like to hear your topics.

Thanks for sharing. I can't wait for more content on the NanoVNA.

You explain this very clearly!

Alan thanks for another great video. I have been used to the old scope and sig gen trick for doing time domain reflectometery. But nice to know a nano vna can do that too!

Thank you so much, sir ... very informative and simple to understand

Perfect timing. I'm looking forward to the coming videos 73 NE5U

Very informative, as usual. Thanks.

Thanks God your healthy. Another excellent video.

Amazing lesson! I cannot wait for the next :D

Thanks, looking forward to the next videos!

Thank you so much by very instructive video. RF is a fascinating science. I have learned many new things with your video. Although English is difficult to me, I will try attend your others videos.

Everyone of your videos is clear, concise, and enjoyable. Automatic like. I love my RSA507A. Until I save up for a TTR503A, an external coupler is getting me by. My calibration set is built with help from your previous videos. They compare well enough to commercial sets. My use is greater than hobby but less than a research lab. Thanks for the excellent videos!

As I have said many time, these videos are brilliant. Thank you very, very much. 'Magenta' is the color name I believe you have there. At least that's the name we use in the cockpit to refer to our navigation "magenta" line.

very nice...cant wait for next videos for how to with VNAs

Thanks for the video, Alan - excellent as always. I bought a Nano VNA because I was having issues with the range of the anti-collision device in my sailplane. It allowed me to design my own antenna which has vastly improved the coverage, and given me greater time to respond to warnings. Without it, I would not have had a clue how bad the various proprietary antennae were at the frequency used, 868.3 MHz. It allowed me to get pretty close to the centre of the Smith Chart even without a matching network and it shows around -30dB reflection loss and an VSWR of less than 1.1. Can't think of anything else to use it for yet but I am a 'newbie' to the world of electronics and particularly RF.

Excellent video. Well done!

Thanks a lot for your explanation. As always, it was very good and instructive Regards

Awesome video! Keep up the quality content

This reminds me of being an undergraduate and trying to use a Time Domain Reflectometer to diagnose a local area network problem. MIT Chaos Net ran over 1/2" UHF cable (sorry. I don't know any details, though I might recall correctly that it was 50 ohm). The TDR would apply an impulse on the cable and then plot the voltage over time. Any place where there was a bump in the plot indicated a problem on the line and you could calculate how far from your test point the problem was based on the time lag of the reflection. After one of two times doing this we eventually learned that the problem was always in the Building 38 basement phone closet. This network cable was stuff and fragile and had a minimum allowed bending diameter of about four feet. The cable needed to make a large turn there and whenever a workman leaned a ladder against it it would kink the cable. I think we had to fix that once, but I don't recall how.

Thanks Alan. My NanoVNA (a Fathers'Day gift) arrives today, so your video was very timely. TRGHS. 73 Bill N2CQR

Thanks again, Alan. I learn something new each visit to your channel. Can't wait to see how the Nano VNA stacks up to the Professional VNA. 73, de KB7ZUT

Well done, thank you for this vid.

This little VNA gives me a wealth of information about my antenna. I'd LOVE to see a video on how to interpret the data, and make use of that interpretation to know what I need to change about my antenna to optimise it.

I just had a phone interview (2020 ECE grad) about the difference between a SA and a VNA the other day and your videos, along with some credit to the signal path, allowed me to answer him with confidence! Thanks so much for your videos, they're amazing

Thanks! Damn, I like your videos. Always Very well detailed and explained.

oh my god this looks so amazing but i havent got the time yet to watch. fffffffffffffffffuuu. onto my watch-later list. you're a champ, w2aew.

Very nice explained 👍

Thanks. So far so good and I have some catching up to do.

Great videos, thank you!

Awesome Content

Very good video, as always😊. Can’t almost not wait until the next one. Take care and keep up the good work! 73/Mikael

Great video. I would like to know more about the S parameters. Thank you.

Very informative. Thanks.

Great video, thanks

Another interesting cartoon, thanks again :) Zdravím z České republiky

Very informative 👍

This was just terrific

Thanks for the video.

superb, as usual!

Thank you for all your videos you are an awesome teacher. I have a question, if my oscilloscope is limited to say 200 MHZ is there a way to measure 2.4ghz with something like a signal injection with a set divider and how well would that work out?

Great video, thank you!

Congrats on your mention in this month's QST. Best 73's de WD6FIE

Scope probe is the coolest way to point during presentation

I really liked it

Congrats on the nice write-up in QST

Cheers, Alan. This is a very useful video. When you do the future videos, could you demonstrate making some basic measurements like insertion loss and VSWR on the NanoVNA? I have one of them but I just can't seem to make sense of it, wither using it directly or through the PC software. Some pointers would be most helpful. Thanks!