6SN7 tube GTA vrs GTB

I would like to know the difference between the designation GTA and GTB.

Thanks

fordmod07-04-2008 3:14pm

jtwrace Details Discussions Posts This discussion Message User 443 posts 07-12-2008 at 11:22am Copy Comment URL Report Comment Edit Delete Rodman- I've been wanting to try some Tung Sol round plates..I use the Pope Holland's now. Thoughts?
jtwrace Details Discussions Posts This discussion Message User 443 posts 07-13-2008 at 02:00am Copy Comment URL Report Comment Edit Delete OK. I've tried NOS RCA GTB's and never liked them. I am in Charlotte, NC. You?
jtwrace Details Discussions Posts This discussion Message User 443 posts 07-13-2008 at 12:58pm Copy Comment URL Report Comment Edit Delete OK. I will check that out. Funny, I will be in Indy in two weeks for work....
jtwrace Details Discussions Posts This discussion Message User 443 posts 07-15-2008 at 10:28pm Copy Comment URL Report Comment Edit Delete how are the Sylvania 6SN7WGT that good? I was told they are GREAT. Is this true? The "best" 6sn7? How do they compare to the RCA GTB's? Thanks,
jtwrace Details Discussions Posts This discussion Message User 443 posts 07-26-2008 at 08:33pm Copy Comment URL Report Comment Edit Delete Has anyone heard of the 1578-6SN8 tubes from Russia? If so, I would like to know what you think of them. I like all this tube talk. :) Thanks-