In Reply to: Where from that hum?? posted by vinnie2 on September 11, 2016 at 14:13:25:
60hz hum = filament supply
120hz hum = B+ supply.
Also are the filament lines balanced? if not this could cause hum. Routing of filament wires could be an issue.
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Follow Ups
- I don't know how the power supply is... - Cougar 21:47:44 09/11/16 (4)
- RE: I don't know how the power supply is... - vinnie2 04:08:22 09/12/16 (3)
- Sorry for the late reply... - Cougar 19:29:17 09/13/16 (0)
- RE: I don't know how the power supply is... - SteveBrown 15:38:23 09/12/16 (1)
- RE: I don't know how the power supply is... - vinnie2 16:00:17 09/12/16 (0)