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gfa555

  1. Will2225

    Help with Adcom GFA 555

    About a month back I recapped the small board on this amp and everything worked perfectly. Today I tried changing out the filter caps with 18,000 100volt caps. I powered it on with a 150 watt bulb in my dim bulb tester. The bulb lights brightly then dims and then starts to get brighter and...
  2. B

    Adcom GFA-555 Help Needed

    Hello, I picked up an Adcom GFA-555 with a blown left channel. As you can see, I've circled in red the burnt resistors (R1 and R7) and transistor (Q8). I'm assuming the problem is a blown output transistor, but I wanted to see if anyone has experience with this particular problem. If you...
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