Bassman SF AC568 circuit hissing

tim

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Join Date: Sep 2006

Posts: 294

Location: South Central MIssouri
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#1

Bassman SF AC568 circuit hissing

09-28-2006, 12:47 AM

Hey all..I have a Bassman 50 SF on the bench that is hissing more than I think it should. I have replaced all preamp tubes, plate load resistors, resoldered all solder joints, replaced cathode bypass caps, etc etc...new filter caps were replaced a few years back.....I don't know what else to try.....maybe it's normal for this amp to hiss.... any ideas???
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Enzo

Member Emeritus Forever

Join Date: May 2006

Posts: 36609

Location: Lansing, Michigan, USA
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#2

09-28-2006, 04:23 AM

Isolate the problem, what stage is hissing?

Education is what you're left with after you have forgotten what you have learned.
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