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2:90 preamp loud hum

Posted: Thu Jun 06, 2019 5:23 pm
by opauly
Hello!
My 2:90 preamp is having a loud hum in channel A. Channel B does not have it. I already tested all tubes (with a tube tester) and all are fine. Hum goes away when guitar is unplugged, but in that case why is channel B not having that loud hum?

Thanks!

Re: 2:90 preamp loud hum

Posted: Wed Jun 26, 2019 4:37 pm
by opauly
Any ideas?

Re: 2:90 preamp loud hum

Posted: Wed Jun 26, 2019 11:15 pm
by Henz
Hello, Forgive me but are you refering to the 2:90 Power Amp?

Re: 2:90 preamp loud hum

Posted: Fri Jun 28, 2019 11:04 pm
by opauly
Yes! I am sorry for the title, it is the power amp. The 2:90 stereo simulator.

Re: 2:90 preamp loud hum

Posted: Sat Jun 29, 2019 11:20 pm
by Henz
Thats ok. man ,I cud use much more info on your setup to try to help. Are you plugging guitar directly in the input of 2:90 on the back and using Instrument switch.... etc... A hum cud be 1001 things. try to tell me your signal path. Blessings. Jim