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Ampex 31560 Tube Amp schematic

SJK2, hi. If the 'repair' shop needs a schematic for a pair of push-pull 6550 amps to fix them: 1. I would not trust it to work on them. This is kind of like a supposedly skilled surgeon wanting a copy of Anatomy 101 before operating. 2. A skilled tech with vacuum tube experience could quickly draw a schmatic by simple observation. Here are the things that need to be done. A. replace all electrolytic caps with new of like value B. replace the silicon diodes in the power supply both B+ and bias supply C. clean all tube sockets. D use something gentle like Windex and clean cotton cloth to clean amp. Consider replacement of all coupling caps. Test all R for drift or openness. These amps were built with the same robust qualities you would see in any first tier electronics of the period. Take the time to find someone really skilled in vaccum tube electronics and be sure that is the case before entrusting them for service.


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  • Ampex 31560 Tube Amp schematic - elektron 12/25/1112:18:46 12/25/11 (0)

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