This a pretty specialized and isolated question. I am looking at the schematic for Ella 3.7. In the bias supply -50VAC is rectified and filtered and sent to 4x 22K pots for output tubes. Does each pot have its own 4.7K resistor to ground?
Bias is supposed to be -36V before the grid resistors. What voltage should be measured at pin 5 (grid) of the EL34 OP tubes?
Thanks for any info.
Peter
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Topic - Question about Ella bias supply - 22K pots - PeterI 16:07:40 01/11/14 (0)