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unobtainium

  1. mozcho

    Semiconductors in Vintage Hifi - What's the Deal?

    I'm not an electronics guy. I have heard and read about semiconductors used in vintage hifi, that your precious vintage gears will become doorstops if a crucial piece of IC or semiconductor is spoiled which you cannot find a replacement for. My hifi friend and also a good repair tech for vintage...
    • mozcho
    • Thread
    • semiconductors unobtainium vintage
    • Replies: 10
    • Forum: Solid State
  2. C

    Pioneer SA-9800 unobtainium SK34 JFETs. Has anyone found an equivalent solution?

    Hi, I'm struggling to replace those pesky SK34 JFETs s on the power supply board of my Pioneer SA-9800 blue line. It's the AWR 196 (HG UK version with double voltage regulator transistors), but the SK34s are on all the power board versions. Initially I had a bad 100Hz hum that I previously...
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