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Adcom parts needed (GFP-1A & GFT-1A)

Discussion in 'Electronic Repair' started by Tim Schwartz, Apr 18, 2013.

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  1. Tim Schwartz

    Tim Schwartz Guest

    Hello all,

    I've got 2 vintage Adcom repairs here that I need parts for. Anyone
    got any parts units around?

    One is a GFP-1A preamp that has a mangled input selector switch S4.
    The Adcom part number is PE-90386-02. It will NOT interchange with the
    record selector switch. Th original was mangled by a really bad attempt
    to clean it, and the contacts are bent and broken on one of the 2 wafers.

    The other is a GFT-1A. While I've got the service manual, it does not
    include the schematic. I've got a GFT-1 schematic, but it is quite
    different than the "A" version. This unit has a bad detector
    transformer T102. Sorry, no part number, as its not mentioned in the
    manual.

    Many thanks!,
    Tim
    Bristol Electronics
     
  2. chuck

    chuck Guest


    Tim,

    Is Adcom gone or are they not supplying parts for their older models?
    Thanks. Chuck
     
  3. Tim Schwartz

    Tim Schwartz Guest

    Chuck,

    I did contact the parts vendor Adcom mentions on their website,
    Affiliated Electronics in New Jersey. While I have no idea how
    extensive their parts inventory is, these units are 20+ years old, and
    they don't have them. Its why I was hoping another shop might have one
    in their junk heap.

    Adcom is still around, or at least they have a web site, but I don't
    know any local dealers that carry them.

    Regards,
    Tim
     
  4. chuck

    chuck Guest


    Thanks Tim. I still rarely get some old Adcom pieces to work on and
    it is nice to know that Affiliated is still around.
     
  5. amdx

    amdx Guest

    Hi Guys,
    Just wanted to piggyback a question about my GTP 500. It is the FM/AM
    preamp.
    It's been 10 years since I looked into it, but my GTP 500 has a
    problem with the FM, no longer recall the symptoms. I was in electronic
    repair I know some products have a common problem. Is there an issue
    with the FM that crops up on this item? Such as C12 goes open/short?
    Mikek
     
  6. chuck

    chuck Guest

    I don't remember the number but bad trimmer caps were a problem in
    these tuners. Chuck
     
  7. Tim Schwartz

    Tim Schwartz Guest

    Mikek,

    The trimmer caps in the front end of the tuner are a common problem
    with these units. Replacing them requires a realignment, as you are
    replacing the things that you adjust to align the tuner.

    I would also not be surprised to see the memory backup capacitors
    failing by now.

    Regards,
    Tim Schwartz

    P.S. You are usually better off starting a new thread with a new
    header, as people who know your model will reply when they see it in the
    subject line.
     
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