Tube upgrade/rolling question

Try the TJ Meshplate 300B tubes. They're as good as it gets.
I'm not familiar with the other tubes in your amp.

Try the Mapleshade brass dampers and then the differences
will be trivial.

Last time I checked, Mapleshade does not build a brass damper for a 300B tube. Perhaps Brauser was suggesting them for the smaller tubes. The largest available, unless they've come out with something new, is an Anchor C which is for an EL34-sized tube. You can, however, buy a nylon damper for a 300B tube from Herbies (Hal-O dampers). I doubt very much whether any of them will make anywhere near as much of a sonic difference as going to a better tube, which would not be difficult given what you have in there. That is not to say the dampers are not a worthy investment, but that improving the tube will give way more bang for the buck IMO. I love the Western Electric I use in my amps, but you need to sign away your first born child to get a pair. Short of that I'd look at the newest issue of the Svetlana 300B tube (they were having problems with the 300B for a while, but the brand new ones are supposed to be pretty good). TJ's, JJ Tesla, and Valve Art would all offer improvements over Chinese IMHO. I had a pair of Chinese tubes for my amps and they sounded truly awful in comparison to the WE's. I read a recent review (a 300B shootout) ...cannot recall where, that claimed the newer Svet came very close to the WE in terms of putting it all together in a 300B tube. Perhaps someone else could recall where that review was.

Marco

Brauser, I was warned that the surround type of brass dampers from Mapleshade may be more able to hold in the tube heat, shortening tube life, rather than making it easier for heat to escape into the air, as the manufacturer believes.
What is your knowledge regarding this claim, made by someone who was using a different company's damper?