B1 high, suspect 4R1B low in value or insufficient current draw from PGM. Note 4R1A high and 4R1B low could be a combo leading to all these results.
everything else low, suspect R5A/B too high in value or too much draw in MON amp. Confirm 4R2.
B5/6 relations same as B7/8, so any comparative difference there is R value or current draw.
Be sure to give at least 5 minutes warmup before checking voltages, if that looks non-dangerous but off then give it a half hour and check again.
Filament high - if the ratio of input voltage to output voltage is off it can only mean stated current draw isn't being met. I would verify filament voltage at the sockets, not the PSU, there will be line losses from the wire.
everything else low, suspect R5A/B too high in value or too much draw in MON amp. Confirm 4R2.
B5/6 relations same as B7/8, so any comparative difference there is R value or current draw.
Be sure to give at least 5 minutes warmup before checking voltages, if that looks non-dangerous but off then give it a half hour and check again.
Filament high - if the ratio of input voltage to output voltage is off it can only mean stated current draw isn't being met. I would verify filament voltage at the sockets, not the PSU, there will be line losses from the wire.
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