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Acrosound Stereo 120 rebuild

I set the bias to 36ma. But the plate voltage is still 507V. It may relate to I installed Schottky diodes in the power section.
 
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I don't think so.

You should install a thermistor 4A 120R in the primary PT. That would help to reduce the B+ a bit.
Mouser #995-MS22-12104.
 
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