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Mystery Regulator found in Hicap...

Discussion in 'd.i.y.' started by neiljadman, Oct 12, 2019.

  1. neiljadman

    neiljadman Senior Member

  2. john.luckins

    john.luckins pfm Member

    Much depends on what the two active devices on each rail are. Can you make out what is written on them? Could be a basic two transistor series regulator or a cap multiplier with a voltage reference to give it some regulation. Given that most Naim kit it will have supplied will have had its own LM317 based linear regulators such a simple but high bandwidth regulator/filter might be no bad thing as it can get rid of a lot of the HF line noise that goes straight through linear regulators and occasionally upsets them.

  3. Yank

    Yank Bulbous Also Tapered

    Someone let the smoke out of that resistor. And the pass element went bang.
  4. MJS

    MJS Trade: Consultant at WH Audio

    That's an Avondale ASR shunt regulator. That should be easy to fix as the whole thing hasn't been potted in with resin like some we've seen. I don't have a circuit diagram and I don't think Les fixes these any more, preferring instead to fit his TPR4 variant.

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