Hi there,
Recently purchased an older tube amp Fender 75. Great sounding amp. Worked just fine for about 1 month. First a power switch went, fixed that. Now there is a howling noise, like wind blowing through a mic outside or rubbing a mic on a sweater. When I turn off the master volume the noise disappears. No noise on stand by. Guitar volume all the way down- there is noise. Tried to look at different blog and most of them is to replace tubes. Changed them all: pream and power. No difference.
Found few threads that pinpoint to capacitors or old resistors but how to find one from dozens of them?
Please help...
Recently purchased an older tube amp Fender 75. Great sounding amp. Worked just fine for about 1 month. First a power switch went, fixed that. Now there is a howling noise, like wind blowing through a mic outside or rubbing a mic on a sweater. When I turn off the master volume the noise disappears. No noise on stand by. Guitar volume all the way down- there is noise. Tried to look at different blog and most of them is to replace tubes. Changed them all: pream and power. No difference.
Found few threads that pinpoint to capacitors or old resistors but how to find one from dozens of them?
Please help...