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substitutes

  1. njappboy

    Vintage Parts Vendors 2026

    It would seem that we have lost some key vintage and substitution parts vendors due to various reasons and I was thinking it might be time for an updated list: - kpcomponents (Canada) - webspareparts (Portugal) - mouser (USA) - digiKey (USA) - jotrin (Hong Kong and Mainland Taiwan) - Moyer...
    • njappboy
    • Thread
    • parts repair parts restoration substitutes
    • Replies: 15
    • Forum: Solid State
  2. JK-47

    Transistor, diode, IC sub lists from Mcintosh

    While seeking output subs for a MA6200 I was sent these pdf's for substitutes. I only saw pre-1975 docs online. These should cover later. I didn't see this in my searches so I asked them if they had docs. Sorry if this is a duplicate. PDF's attached.
    • JK-47
    • Thread
    • mcinstosh substitutes transistor equivalent
    • Replies: 5
    • Forum: McIntosh Audio
  3. F

    Substitutes for uPA74 uPA75 double transistors

    I recently acquired a Japanese amplifier with a dead channel. I tracked down the fault to a dual transistor uPA75. The base–collector junction is shorted, which in turn burned the R7 resistor. None of the other components seem to be affected. I am looking for a good substitute for this dual...
    • fox
    • Thread
    • learning substitutes transistors
    • Replies: 9
    • Forum: Solid State
  4. T

    Mcintosh 2155 Amplifier repair part substitutes

    Hey guys, I am repairing a McIntosh MC2155 amplifier. I called McIntosh labs and they do not have any stock for the following 3 part numbers. Can someone review my substitutes below and let me know if they are correct? McIntosh# Part Substitute 132143 MPS-D05...
  5. dlucy

    dlucy’s guide - how to find replacement transistors

    Do you have a transistor that needs to be replaced? Figuring out what to look for in a replacement transistor can be difficult, especially if you haven’t been doing this for decades. The following guidance may help you understand how to better find and select a modern equivalent transistor...
    • dlucy
    • Thread
    • find transistors replacement transistor replacements substitutes
    • Replies: 42
    • Forum: Solid State
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