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Old 01-20-2021, 09:14 AM
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MT70B MT70B is offline
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Join Date: Sep 2014
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old_tv-nut, Your are correct the schematic is very blurry. R60 which is connected to B+ is 60K and R58 which is connected to the plate is 10K. The balance control is a 1 meg pot and coupled between the R60 and R58 resistors by a 100K cap. Since the balance control is DC blocked it only affects the signal and not the plate bias. This along with the fact that C77 (a 10K cap) couples the signal directly from the plate on to the next stage is what is perplexing.

Mike
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