I'm not sure if we're still talking about the high voltage at the plate of the trem osciallator or not.
I hope you are not saying that after you corrected the ground connection it changed that plate voltage when trem off?
I'm attaching the schem. from the '65 DRRI as is shows more voltages. With trem off, the voltage at the cathode is zero. With zero current through the tube, I expect the plate voltage to rise to the voltage at supply node 'Z', around 400V. On a real AB763 schematic, that node is shown as 415VDC.
I hope you are not saying that after you corrected the ground connection it changed that plate voltage when trem off?
I'm attaching the schem. from the '65 DRRI as is shows more voltages. With trem off, the voltage at the cathode is zero. With zero current through the tube, I expect the plate voltage to rise to the voltage at supply node 'Z', around 400V. On a real AB763 schematic, that node is shown as 415VDC.
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