Rolling Tubes in the Atma-Sphere C-30 amp

Well, this surprises me. I thought there would be at least a few people rolling tubes in their C-30.

ONE day and you're surprised?

I had a pair of M60s, and I've had other poweramps that use 6SN7GTs in their frontends. In my and MANY others' opinions, there in no overall-finer-sounding 'N7 than the Tung-Sol Roundplate. They seem to be worth around $100 now, with just-found NEW ones well over $200. (They stopped making them in the early 1950s, I believe.)

One other note--even those that test low in various tubetesters still sound great in poweramps.

E-mail Ralph at Atma-Sphere to ask about the most-audible tube positions.
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I also own the S-30 amp. As for the power tubes I only use the stock tubes as supplied by Atma-Sphere. This is based on my conversation with Ralph as to the reliability of NOS 6AS7 tubes. Also, the version of the tube that is the slender bottle is not necessarily suitable for the amp according to Ralph. I recall trying a set of these and immediately the tubes glowed intensely orange and the amp hummed. As for the driver tubes Ralph mentioned tube rolling the front row of tubes would probably yield the most noticeable results. In my case I chose Raytheon VT-231 tubes. I use the stock Chinese tubes in the other positions.