In Reply to: anyone got schematic & voltages for Knight KN715 6BQ5 amp ? posted by freddyi on March 16, 2007 at 13:40:07:
Measure the grid voltage on the 6BQ5s - if it's not ZERO, pull the tube. If it now measures zero, it was a bad tube (grid emission). If it's still positive, it's a leaky coupling cap.
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Follow Ups
- Re: anyone got schematic & voltages for Knight KN715 6BQ5 amp ? - Tom Bavis 15:49:41 03/16/07 (0)