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

Posted by MLin on December 24, 2023 at 18:52:28:
My own MP-1 is around the same vintage. Bought it from Ralph in the 90's as well. It uses 12AU7 for the voltage amp in the line stage. I had it upgraded to solid-state power supply a few years later it's otherwise stock. I recently measure its DC offset after it's fully warmed up and it's around 5mV as well.

The MP-1 Mk iii's DC offset measured only .1 mV once the servo lights go off on the other hand.