DIY HiFi Forum

Welcome! Need support, you got it. Or share you ideas and experiences.

Return to DIY HiFi Forum

Message Sort: Post Order or Asylum Reverse Threaded

Question about Ella bias supply - 22K pots

Posted on January 11, 2014 at 16:07:40

Posts: 1320
Location: Colorado
Joined: October 17, 2006
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.



Page processed in 0.014 seconds.