RF Man - Impedance Matching in an RF Amplifier using Conventional RF Transformers and a NanoVNA

Ғылым және технология

This video discusses impedance matching in a Push Pull Amplifier using conventional RF Transformers. It also shows how to use a NanoVNA to tune and validate critical design parameters including Return Loss (S11), VSWR, and Series Resistance on a Smith Chart.

Пікірлер: 42

  • @AB1Vampire
    @AB1Vampire2 жыл бұрын

    Been struggling with impedance transformation and Reactance. This video brought me a big moment of insight. Thanks for posting.

  • @bparker86
    @bparker86 Жыл бұрын

    You and Sharky are just awesome. The only two that seem to actually share knowledge with the community

  • @Radiotreehut
    @Radiotreehut2 ай бұрын

    Very nicely explained Sir.Thanks

  • @user-vi6lw8dx5f
    @user-vi6lw8dx5f2 жыл бұрын

    RF Man, Your insight is priceless and greatly appreciated. Thank you

  • @JD-526
    @JD-5262 жыл бұрын

    Bravo.... somebody that actually teaches you. And explains everything, excellent work,

  • @alfredoandrade2585
    @alfredoandrade2585 Жыл бұрын

    Your video clears and answer all my questions on impedance matching. Thank you Sir "RF Man".. Salute!

  • @allenmarian2005
    @allenmarian20053 жыл бұрын

    Appreciate your effort in making such informative videos.

  • @rfmanchannel6915

    @rfmanchannel6915

    3 жыл бұрын

    Thanks for your feedback. Much appreciated!!

  • @user-su5sq5ib3i
    @user-su5sq5ib3i Жыл бұрын

    My teacher drilled that formula into my head Z= sqrt(x^2 + Y^2) I will never forget it. I need to make some spread sheets as well, its a great idea. I made up quite a few for my microcontroller and labview classes.

  • @lyleengelbrecht4119
    @lyleengelbrecht4119 Жыл бұрын

    WELL DONE YOU HAVE A MAGICAL CLEAR VOICE TO LISTEN TO AS WELL THANKS FOR SHARING YOU KNOWLEDGE AND NOT DYING WITH IT LIKE A LOT DO THESE DAYS GOD BLESS

  • 2 жыл бұрын

    Very, very nice !! No have a lot of mathematics, but has a lot of practical knowledge !! Pretty good way ! Thanks a lot !

  • @nikaldo7819
    @nikaldo78193 жыл бұрын

    amazing video

  • @rfmanchannel6915

    @rfmanchannel6915

    3 жыл бұрын

    Thanks for you comments!!

  • @user-su5sq5ib3i
    @user-su5sq5ib3i3 жыл бұрын

    We got into calculating series and parallel branches of impedances as well as tank circuits at the end of the first year. We will be building some pretty simple things in the next semester but I really want to build high powered amplifier using one of these devices and incorporate a switchable matching network to use across the amateur bands. My vna should be here in a few more days. Looking forward to playing with that, Thank you for sharing this info. We havent learned the smith chart yet in school but having learned all of the theory already, I pretty much see whats going on in the smith chart, AC theory busted my balls LOL

  • @rfmanchannel6915

    @rfmanchannel6915

    3 жыл бұрын

    I'm happy you found this video helpful. If you need any help down the road, please feel free to contact me any time....

  • @user-su5sq5ib3i

    @user-su5sq5ib3i

    Жыл бұрын

    @@rfmanchannel6915 I appreciate that!

  • @lyleengelbrecht4119
    @lyleengelbrecht4119 Жыл бұрын

    WELLL EXPLAINED THANKS

  • @gregjones3660
    @gregjones36609 ай бұрын

    Thats a match made in heaven

  • @dankmemer8892
    @dankmemer88923 жыл бұрын

    I wish you could have been my professor for Linear Controls class! Thanks so much for this. By the way, isn't the NanoVNA wonderful? It allows us peasants to explore the wonderful world of RF. 73s

  • @rfmanchannel6915

    @rfmanchannel6915

    3 жыл бұрын

    Its a great addition to the lab at a great price!!

  • @researchandbuild1751
    @researchandbuild1751 Жыл бұрын

    When I see the transistor S parameters I thought you would have to make a matching network that would also cancel out the reactance so you would get maximum power into the transistor. Is this not so?

  • @subramanianr7206
    @subramanianr72062 жыл бұрын

    Very well presented. Thanks and a big thumbs up to you 👍👍👍 De VU2RZA

  • @user-su5sq5ib3i
    @user-su5sq5ib3i Жыл бұрын

    Say you are running class AB or B with a transformer that has a center tap secondary, do your turns ratio need to be divided in two so you would have half the amount of turns? EDIT you answered my question in the video

  • @sonax48
    @sonax484 ай бұрын

    What should be a good input transformer for broadband, from 3 to 30Mhz?

  • @nailuj45
    @nailuj45 Жыл бұрын

    if you have zin for one transistor on input equal to 0.9 i multiply or i divide by two ? and for ouput ?

  • @allenmarian2005
    @allenmarian20053 жыл бұрын

    It would be nice if you can share the spreadsheets here

  • @rfmanchannel6915

    @rfmanchannel6915

    3 жыл бұрын

    Please email me and I would be happy to sent it to you. You can find my contact info on my web site. rflinear-amplifiers.com

  • @sm6ehy816
    @sm6ehy8163 ай бұрын

    Suitable matching for 432 MHz with that MRFE6vp1k2 or BLF188xr ?

  • @joaopaulocoelho5401
    @joaopaulocoelho5401 Жыл бұрын

    Hi. Can you give me some more details regarding the 3:1 transformer uses at 9:32? In particular, how it was sized. I believe is coreless am I right?

  • @TelstarElectronics
    @TelstarElectronics Жыл бұрын

    Why are you using a purely resistive load (the pot) to simulate a complex impedance?

  • @delestebroacast8496
    @delestebroacast84964 ай бұрын

    Hello RF Man, how much does the Excel spreadsheet cost? It would be very useful for me, thank you.

  • @alessandrolatteo2915
    @alessandrolatteo29152 жыл бұрын

    awesome video you can share the excel file Thanks Alex

  • @kittony71
    @kittony712 жыл бұрын

    the simplest way is to measure from transistor side no need of variable resistor just terminate input or output with 50 ohms simple

  • @delestebroacast8496
    @delestebroacast84962 жыл бұрын

    sir pleas can you share this excel?

  • @chrisscott1547
    @chrisscott1547 Жыл бұрын

    Good demonstration, but the input match looks really narrow band!

  • @delestebroacast8496
    @delestebroacast84962 жыл бұрын

    sir pleas yes

  • @zeljkoadzic1692
    @zeljkoadzic16923 жыл бұрын

    sir pleas can you share this excel?

  • @rfmanchannel6915

    @rfmanchannel6915

    3 жыл бұрын

    Sure, please send me your email address with a your request. Regards

  • @zeljkoadzic1692

    @zeljkoadzic1692

    3 жыл бұрын

    @@rfmanchannel6915 agamotori@gmail.com

  • @zeljkoadzic1692

    @zeljkoadzic1692

    3 жыл бұрын

    @@rfmanchannel6915 dear thank you in advance

  • @jlog7395
    @jlog7395 Жыл бұрын

    Such a great channel but the video technique is horrendous. Try a tripod and don’t zoom in so close. Would like to watch more of his videos but …

  • @rickeaston3228
    @rickeaston3228 Жыл бұрын

    After the 30th "OK", I stopped watching and went to another video without the annoying OK.

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