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yea I was kinda shocked by all I have seen with other reports, that's is why I had not even bothered to try disconnecting the shunt tube cap before as I just assumed it would not make any difference.
I hate the idea of drilling a hole in the chassis to add a pot, so if a tube swap does not work I will try upsetting the voltage divider of the two 1.8 meg resistors that are used to establish the bias with a fixed resistor bridged on the lower half of the divider. Will start with a 10 meg just to see. A better way would be to just replace one of the resistors with a 1.5 meg fixed and then a 500k pot is series as done on the 7's.
The schematic shows a 100meg cap in the cathode to grid, 100meg? yikes, anyway if that has gone low it would foul things up to. I did replace the .0033 cap that is there as I have read that leaky caps there have been responsible for regulation problems due to bias issues on that tube.
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