My Rogue 99 needs better isolation...please help.

Try Andy @ vintage tube services--www.vintagetubeservices.com. He may have the tube your looking for. I know he did have quite a few 6sn7's at one time. His phone number is listed on the website. Good Listening! Stan

I'm useing Herbie HAL-O Damping rings on all my tubes in my Bat VK5i preamp.They're the best I've tried for tube microphonics and they're reasonably priced. The Cable Company carries them. My preamp rests on a set of Symposium Rollerblocks, which are great for digital or tubes. Decoupling is the way to go for a tube preamp. The rollerblocks sit on a sandfilled Bright Star Audio bigrock. This combination gave me greater dynamics, better low level detail, and better decay. Happy Listening! Stan

Just my two cents worth, but Jeffcott may be right concerning the townshend seismic sink and k-works osobase K. Sand works quite well for bleeding off vibration, but... alot of people use seismic sinks for turntables. If it works well for turntables, it shoud work well for tubes. Also, a symposium ultra platform with rollerblocks would be great, but the price on that combination would be $850 or more. A lot of choices. Best of luck! Stan