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pm300

  1. goldswimmerb

    Marantz PM300 bias won't adjust down

    Hey guys, I'm working on a Marantz PM300 (not the greatest work by Marantz but honestly not too bad either) The dim bulb lights up bright, however both channels do produce output, testing I noticed that my bias for one channel was at 310mv at the lowest adjust point on the trimmer, and can only...
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