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I need a power amp schematic.

Discussion in 'General Electronics' started by Teemu_K, Nov 24, 2003.

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  1. Teemu_K

    Teemu_K Guest

    I'm not sure if I'm posting this to right group but I hope you can
    help me...

    I'm trying to build a guitar amp and it's still on the design level.
    I'm done with basic preamp schetch but got stuck with the power amp

    The amp is supposed to become an mono, 40 - 60 W to 8 ohms. But the
    tough part is that I'm trying to design it with very simple components
    and circuit: idea would be to use only ordinary transistors, no IC's
    or op-amps etc. Also it shouldn't have any output transformers or
    chokes either.

    The amp will be built to an eyelet board using point-to-point
    technique, that way abandoning the new, not neccessarely so good,
    design and construction methods that use cheap and hard to repair
    PCB:s and integrated circuits. That's one of the reasons why I try to
    keep it simple as possible.

    But I'm faced with a problem like this: Where can I find a schematic
    or even a schetch for a suitable power amp. All the designs that I can
    find are based on some Op-amp or IC circuits.
    I haven't been able to find even a single one simple, bridge amplifier
    design, not even with a lesser power output.

    If you could post me some e-mail adresses where to find the kind of
    schematics I'm looking for I would really appreciate it.

    That's just: simple transistors, simple design, big power output and a
    possible bridged design. No output transformer. Many thanks in
  2. Ken Taylor

    Ken Taylor Guest

    You need to improve your search engine skills, it'll make life a lot easier.
    The term:
    "audio amp" 100W circuit
    revealed at number 2 the site which had:

    There's plenty more. However I don't think your reasoning for ignoring IC's
    or PCB's is valid. It may well be easier to do the construction on a
    prototyping board, but it will need careful layout to prevent feedback and
    similar problems. It'll be a lot easier to use some of the hybrid amplifier
    modules as well, but it depends on why you want to do this project this way.
    If it's for fun/education/satisfaction, then by all means go for it and
    learn in the process. But if you honestly believe that this will be a better
    design/construction method, I think you'll be disappointed.


  3. Teemu_K

    Teemu_K Guest

    Thank you very much Ken, this page was just what I was looking for.
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