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RE: The MP-1 and MP-3 servo system

Hi Lew:

If it helps, I very recently had a similar issue with my MP-1. With Ralph's help, I traced the issue to a pin in the PSU connector of the amp side being pushed in thus losing connection. Pulling the pin back in position fixed the issue. In this case though, the DC offset light on that channel stayed lit and the 3 6SN7 tubes (CCS and the gain tube in the line stage) did not lit at all since the pushed-in pin was for filament supply.

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