Ralph, I had a Croft amp once designed for LOMC. It used parallel ECC88s and 24volt B+. It did have some tube hiss but worked well enough until any of the triode sections went microphonic. I tried swapping the psu for 2x12v lead acid batteries but it robbed the life out of it. On AC, it sounded great, notwithstanding the tube noise.
Ssssh, is your tube preamp really that quiet?
Does anyone own, or know of, a tube preamp that is TRULY QUIET even when the volume is turned up? On my CAT tube preamp, there is always a certain amount of tube rush when the volume is up. This doesn't really bother me as it is not really audible when music is playing, BUT I'm sure the sound could be better IF this wasn't the case. Anyone have a totally quiet tube preamp?? No ssssh whatsoever!