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Transistor Push Pull Amplifier, for the Beginner, no transformer…

Transistor Push Pull Amplifier, for the Beginner, no transformer...



Transistor Push Pull Amplifier, for the Beginner, no transformer, the basics
NPN 2N2222, PNP 2N2907, Diodes 1N4003?

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Tags: transistors

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19 Comments

  1. Date: December 8, 2016 at 04:18
    Author: area46241

    Your tutorials seem to come at just the right time..five minutes ago I gave up on my amp circuit…couldn't get it right….this circuit looks way better than what I had…trying to get a 9.5 mm mic amped up to drive an 8 ohm speaker…

  2. Date: December 8, 2016 at 09:03
    Author: esmaeil nam

    Many thanks for your video. What sort of transistor part numbers are normally suitable for such an amplifier circuit?

  3. Date: December 8, 2016 at 09:57
    Author: Kenta Ishii

    I have once watched an audio circuit that uses magnetic type (center tapped trans) as push-pull's load. Static type has actually cross over as this video, courtesy of you.

  4. Date: December 8, 2016 at 14:58
    Author: R Vass

    Sir, no one could have explained it any better than you. my respect to you. I thouroughly enjoy your videos. thank you.

  5. Date: December 8, 2016 at 15:06
    Author: riv1950

    Sir, You make very good videos and incredible good descripions too.Thank You

  6. Date: December 8, 2016 at 21:12

    thank you very much. One question/remark : When the top transistor is conducting more, the "resistance" of the bottom one is kind of increasing (as it is actually kind of "blocking"), this mean that the extra current that Top transistor generates is actually "directed" to the load as it cannot go down ? Is that correct ?
    Thx

  7. Date: December 8, 2016 at 23:25
    Author: ChrisWilson5006

    Superb, you made it very clear, and the presentation was excellent, as always, much appreciated, thank you.

  8. Date: December 17, 2016 at 09:16
    Author: john trraxis

    Mr. McWhorter could you please tell me what the part numbers you used for the  transistors and diodes. Thank You!

  9. Date: December 19, 2016 at 12:47
    Author: Nc Nc

    Class AB amplifier, the best transistors is using npn 2n3055 & pnp MJ2955 ? can power 50 watt ?????? hahaha

  10. Date: December 31, 2016 at 17:35
    Author: Keith Noneya

    Ok I can see that the compensating diodes are required for a smooth transition. But WHY and how do they fix the problem? Best Wishes n Blessings. Keith

  11. Date: June 11, 2017 at 16:41
    Author: Tomas L

    Hi,
    I have a jukebox that uses a tube amp. For the life of me I can't get it to work. I am considering either sending it out for repair (EXPENSIVE) or replacing it with a mosfet amp.
    Just curious if you have an opinion of the pros and cons of doing this. Thanks, and as always love your vids.

  12. Date: June 29, 2017 at 21:09
    Author: Marek

    Thank you for explaining. But shouldn't that 470 Ohm resistor at PNP transistor be connected between GND and collector?

  13. Date: October 9, 2017 at 17:12

    Really well put together…..easy to follow, nice visuals and slow clear concise voice…thank you very much.

  14. Date: November 30, 2017 at 04:59
    Author: Rick West

    The diodes cause both transistors to be ever so slightly on. If these were beefy transistors driving a speaker, they would get hot. In a case like that, the diodes should be mounted to the same heat sink as the transistors so the drop across the diodes drift with the BE drop in the transistors. If you don't do this the diode circuit may turn on both transistors too much and the current running through both of them in series may cause what we call thermal runaway…. the transistors may fry.

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