Do "Tube Rings" really work?

Only a little bit microphonic from of my Cary 300SE Signature after tapping by an eraser. I have to put my ear next to the corresponding speaker to sense it.

A tweek offered on one of the tweek sites says to use 2-3 wraps of teflon tape around the tube upper portion. (Midway between middle and top.)
I have tried High hats and the rings. The high hats did something but I did not like it.
The Teflon tweek cost very little and probably does as much.

i cant seem to find anyplace on line that sells tube rings. anyone got a url for me?

thanks.

I think Galen Carol Audio sells them. Galen is a great guy and a pleasure to deal with. He is at www.gcaudio.com or call 210-805-9927.

Mdomnick, here's a website that has an interesting tube damper. I've never tried them, but they look interesting.

http://www.vintagetubes.com/Dampers.htm

Give us an update on what you ultimately find.