6BX7 amp
Looks like you might manage with a two stage amp with no feedback if
you had a higher mu valve in front. I'm wondering about something like
a E80CC or even better, ECC40. I've used 6BX7s in output - very good
sound. Problem I had is I couldn't parallel the halves because they all
varied so much on my samples, which is common. I ran them in fixed bias
at one point with seperate bias and coupling cap per half but in the
end I couldn't be bothered and substituted single 6AH4s which sounded
equally good if not better. I now drive these with a SRPP stage made up
of 2C22s. That's a TERRIFIC valve - better than a 6SN7. Combination
sounds really excellent. Needs a preamp, though. Andy
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