In Reply to: Schematic? posted by FenderLover on April 5, 2015 at 12:38:14:
....and the pot is used to balance cathode current by effectively varying the g1 voltage inversely to each final of the PP pair. When current is balanced, the residual AC component riding on B+ is balanced out in the OPT...in theory. This is NOT the traditional hum balance pot in a filament circuit.
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Follow Ups
- Yes, most Ampex 6973 amps are like the schematic on the left... - Steve O 13:35:07 04/05/15 (0)