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bias circuit

  1. Stavee

    Bias Board

    Does anyone have any comments about this company and their product? Thought about using this in an amp I'm going to build with 4 KT88's in PPUL...
  2. G

    Power Amp Repair - Bias Circuit - NPN Epitaxial Planar transistors

    I am repairing power amps on a JVC FX515VTN. There are 2SD636 NPN Epitaxial Planar transistors used in the bias circuit. The bodies of these transistors have a hard white coating, looks like it could be paint. I am positive the coating is not thermal compound paste. I looked at an Onkyo power...
  3. Mightyhal

    Can't balance DC on SX-880 after repairs

    Following up on https://audiokarma.org/forums/index.php?threads/sx-880-output-transistor-replacements-b705a-2sa1075.961503 -- I've had some ups and downs repairing the SX-880 (I'd shorted part of the power supply with a probe slip, and one of the output chips had shorted--one which had been...
    • Mightyhal
    • Thread
    • 880 bias circuit dc balance dc offest sx-880 transistor equivalent transistor replacement transistor substitute
    • Replies: 6
    • Forum: Pioneer Audio
  4. S

    Dynaco Mark III Removing Preamp Power

    Hey everyone, I’m attempting to assemble a set of Mark IIIs and want to skip installing the front octal socket and leave only bias test jacks. Is it as simple as ignoring anything that leads to the octal socket and leaving only one connection point plus a ground point to probe for bias...
  5. tusntuk2

    Kenwood KR-5600 Intermittent noise - is it bias related?

    This is the third thread on this interesting receiver. Previous threads helped fix a relay problem and questions about recapping - thanks again! Now I have replaced all electrolytics in the PS and the Audio board (power amp) and the amp sounds amazing with the FM radio. (Yay!) BUT - here's...
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