In Reply to: RE: These here tubes can be tricky little buggers! posted by vinnie2 on September 28, 2016 at 03:26:25:
"why would the tube drawing more current cause a hum?"
You said anode voltage was much higher than the other tube. That would indicate it was drawing less current. A number of things could cause that, including misalignment of the grid (as someone else mentioned) or a defect in the filament. If the filament is AC heated, all bets are off. :)
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Follow Ups
- RE: These here tubes can be tricky little buggers! - Triode_Kingdom 06:33:49 09/28/16 (3)
- RE: These here tubes can be tricky little buggers! - vinnie2 07:48:43 09/28/16 (2)
- RE: These here tubes can be tricky little buggers! - Triode_Kingdom 08:40:12 09/28/16 (1)
- RE: These here tubes can be tricky little buggers! - vinnie2 09:06:52 09/28/16 (0)