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transistor equivalent

  1. M

    MA 5100 Transistors

    Hey everyone, great to be here! My MA5100 has developed a crackle when warm (left channel). Freeze spray pinpoints the fault to Q209 (PNP driver), so the course of action is to replace a few small signal transistors on both channels, as a precautionary measure. All good so far. I have been in...
    • Marabou
    • Thread
    • crackling fault mcintosh mcintosh ma5100 transistor equivalent
    • Replies: 14
    • Forum: Solid State
  2. LFazio51

    Transistor Cross-Reference 2SD425 2SB555

    Happy New Year to All! I'm working to restore a Yamaha CR1020 (http://audiokarma.org/forums/index.php?threads/cr1020-restoration-guidance.798122/) and it appears that the transistors are somewhat out of spec. I'm very fresh into the hobby and have no idea what the appropriate modern...
    • LFazio51
    • Thread
    • diy transistor equivalent yamaha
    • Replies: 9
    • Forum: DIY
  3. tusntuk2

    White noise in NAD 7140 phono - transistors?

    Finished recapping the NAD 7140 with great results - POWER and dead quiet floor in the main amp, Problem is, phono preamp generates white noise by itself, no input, and I'm having trouble identifying replacement transistors. Any ideas? Thanks so much!
    • tusntuk2
    • Thread
    • nad noise phono transistor equivalent
    • Replies: 0
    • Forum: Solid State
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