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Rolling Tubes in the Atma-Sphere C-30 amp

I imagine there must be at least a couple of people who have experience with rolling tubes in the C-30. Suggestions would be greatly appreciated regarding what tubes to use for the best possible sound and which positions they should occupy in the C-30.
sabai
clio09
3,374 posts
 
The problem with NOS 6SN7 tubes these days is the fact the desirable brands like the Tungsol Round Plates, Sylvania GTs, Raytheons, Ken Rads, RCA red base are becoming scarce. What you see on eBay is a crap shoot. Most of these tubes are not being measured thoroughly and will most likely be unacceptably microphonic. There are a few trustworthy tube dealers out there that have a nice stash but you will pay for them. FWIW I have heard from Ralph based on feedback he has received from customers that the new production Psvane 6SN7 is quite good. I intend to try a set in my custom MP-3 when I receive it.
sabai OP
2,027 posts
 
Clio09,
Thanks very much for all the details. Much appreciated.
sabai OP
2,027 posts
 
Jeffreybehr,
Thanks for this useful information.
sabai OP
2,027 posts
 
Clio09,
Thanks for clarifying.
sabai OP
2,027 posts
 
I just received this message from an Internet friend. I just emailed him for an explanation. For someone like me who is not technically advanced, can anyone comment in simple English so that I can understand what is going on here?

"DO NOT PUT THE RPs IN ANY LOCATION EXCEPT THE FRONT 2 TUBES !!! This is VERY important because the drive tubes are GTBs which have a rating of 450V - which is way beyond what the RPs can handle."
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