Are there any old Russian tubes which would work? I have looked over the net and most places say to check with your maps manufacturer..so that is what I am trying to do. I love to listen to different types of tubes in different positions, and know the small signal tubes probably make the most difference, so I love to experiment. Just don't want to create a problem and hurt my babies. The ECC99 and 6414 both seem to have potential, but I want to check before doing any damage. I know there are many variants of the 12AU7 tube, and wonder if any of them will work well and handle the current swings in a better fashion than the AU? the 5814? 5963? 6189?
6n6p Russian ECC99?
Just interested in any thoughts and observations. These amps are so wonderful, I want to try every possible tube to find the ones which are "just right" and although the 12BH7 (I'm using RCA black plates now) sounds good, I just feel there have to be other possibilities out there.
Thanks for any thoughts and observations..