[gregb]

Another interesting one I just saw on a 39-30 was a long ago tech moved the negative bias supply connection for the 41 output tube from before the resistor network and attached it straight to ground. The result for me was an open primary on the output transformer. I wonder what the guy was thinking when he did this. The radio hum level must have increased and I would think there may have been audio distortion. Wonder how he explained this to the owner at the time.

Gregb