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In Reply to: RE: 240hz hum through left channel posted by LKP48 on September 5, 2016 at 16:23:54:
You mean 120hz I would imagine but the first thing you want to do is short the input jacks to see if the hum disappears..If it does,then the problem is in the signal path but if the hum is still there,it me be a filter cap problem. If you have one good channel,I would look for a bad ground on the input jack or take your ohm meter and measure to see if you have continuity from the input positive to the first input tube grid.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
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Follow Ups
- RE: 240hz hum through left channel - Michael Samra 16:38:57 09/05/16 (1)
- RE: 240hz hum through left channel - LKP48 20:41:59 09/06/16 (0)