5F1 Distortion Like Blown Speaker

[captntasty]

Hi all,
I had located a post (not even sure on this forum) that gave some suggestions regarding the distortion I'm getting from my Champ head. It sounds like a blown speaker but is not - it is sort of on top of the nice natural overdrive of this amp when cranked. Tried different tubes and it remains. In this post it led me to believe that it was some sort of oscillation and suggested a few things to try - move OT or PT, shorten certain leads, etc. I can't find it as firefox couldn't reopen the tab after having shut down for updates. Any help is much appreciated. I've searched on this forum with limited success...
Thanks.,., Patrick

[acorkos]

ths is a good place to start....

Tube Amplifier Debugging Page

[crowguitar]

could also be some issue with something in the circuit (caps, resistor, etc) thats affecting the gain stage. I would have a tech look at this.

[captntasty]

ths is a good place to start....

Nothing there about this particular problem. There is a thread or post about this very same problem - an unwanted distortion on top of or behind the normal voice of the amp that sounds like a blown speaker but is not.