Tube Amp "Ringing"

Microphonic tubes cause ringing. Probably time to replace one or more of the small signal tubes. You can tell which one(s) is the culpert by lightly tapping on the tube, lightly(!).

Sounds like tube microphonics. There are several tube dampers on the mkt. Do a search or google them. It might also be a funky tube that needs replacement. Microphonics is one of the downsides of tubes.

Thanks guys,

I figured that it was "tube microphonics" but didn't know how to go about solving the problem short of buying new tubes. btw, found a site for HAL-O Vacuum Tube Dampers and was wondering if any of you have used these (or other brands for that matter) and what your thoughs are about these products in solving "tube microphonics". Guess damping my tubes might be my first "tweak".

If you can hear ringing without toughing your tubes they need to be replaced. Dampers will help reduce ringing a bit but that would be for low level ringing inherent in the tube or caused by outside forces. IMHO.