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Excuse for a class A DIY AMP build?

Discussion in 'd.i.y.' started by Dowser, Sep 3, 2019.

  1. Arkless Electronics

    Arkless Electronics Trade: Amp design and repairs.

    It's "frowned upon" etc but in many cases will be perfectly OK. It all depends on just how long, how they are routed and above all else on the actual circuit but real world parasitics etc mean it's not possible to simulate etc and only a "suck it and see" approach can be used... If you don't have lots of test gear, the knowledge to use it and the knowledge/experience to spot incipient instability and to track the cause of any oscillation or ringing to this or a completely different cause it is best to stick to a known good layout.

    The length of the wiring to the output devices in a Quad 303 is a good example of it being fine in at least this specific instance.
    CJ14 likes this.
  2. chiily

    chiily PFM Special Builder

    geoturbo likes this.
  3. Dowser

    Dowser Learning to bodge again..

    Quick update - looks like Colin has a couple of SECA amp boards for me to try, so I’m going to go that route.

    I’m expecting problems with the stock heat sinking but given chassis was so cheap I’m not averse to mounting larger heat sinks internally down each side and then hacking the casework for airflow if I cannot rig up a fan solution that allows stock ones to cope.

  4. Marra

    Marra pfm Member

    You will like what you hear.
    Dowser likes this.
  5. Marra

    Marra pfm Member

  6. Dowser

    Dowser Learning to bodge again..

    Thanks - yep, have seen (& also pissed at photobucket shit!). Colin put my boards (v2) in post today :)
    CJ14 likes this.
  7. Marra

    Marra pfm Member

    Are they the ones with the bootstrap built in?
    CJ14 likes this.
  8. CJ14

    CJ14 Retired

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