Pro Junior feedback problem - HELP!

[Dr. Lo]

My PJ is now giving me a lot of uncontrollable feedback (high-pitch squeal) when I have its volume control higher than 3/4 of the way up. This wasn't a problem before, even at those high volume levels. To correct this problem, I've tried replacing the preamp tubes (thinking they may be going microphonic) and even the power tubes. Neither change worked.

Any suggestions?

 

[Stratcat]

Re: Pro Junior feedback problem - HELP!

How long have you had the amp? You can either exchange it for a new one that works properly, or take it to a Fender amp tech under the 5 year warranty.

 

[jeremy]

Re: Pro Junior feedback problem - HELP!

have you tried it with different guitars? does it happen if you plug straight in or is there fx involved?