In Reply to: No switches in the signal path and Humm is being measured... posted by Ivan303 on September 1, 2020 at 10:12:22:
You shouldn't need a scope to troubleshoot the PS. The primary cause of hum are electrolytics that dry out. The easiest way to find the problem is to just jump each electrolytic with a known good one. If it is the problem, the hum will vanish when you place the good electrolytic across the failed one.
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Follow Ups
- RE: No switches in the signal path and Humm is being measured... - fredtr 09/1/2017:31:21 09/1/20 (9)
- Still need a scope... - Ivan303 07:51:15 09/2/20 (8)
- RE: Still need a scope... - fredtr 08:51:37 09/2/20 (7)
- DIY-HIFI Supply still sells Rubycon caps that go into this amp... - Ivan303 09:42:56 09/2/20 (6)
- "then I'm stumped." ............................... - Cut-Throat 12:51:43 09/2/20 (4)
- Both monoblocks on bench w/ no input... - Ivan303 14:20:46 09/2/20 (3)
- RE: Both monoblocks on bench w/ no input... - Cut-Throat 14:26:59 09/2/20 (2)
- I have no such curiosity... - Ivan303 15:52:19 09/2/20 (1)
- Well, at least let us know if you get it solved .............. - Cut-Throat 11:41:10 09/3/20 (0)
- RE: DIY-HIFI Supply still sells Rubycon caps that go into this amp... - fredtr 11:58:12 09/2/20 (0)