tube damper help

In my experience, tube dampers are the least effective of all tweaks I have tried.

Herbies makes good tube dampers. They can be effective in quieting microphonic tubes.

I mainly use O-rings bought at the hardware store for peanuts. Try 'em for a while to make sure they don't melt :-)

As with Tvad, I'm not at all sure they do anything much. And yes, I've tried the Herbies versions too.