I have two tube power amps which have had no issues. Actually, on one amp out of a pair of VTL monoblocks, I have had a tube go (once in 7+yrs). My other amp is an EAR 859 which uses EL519 tubes (yes, out of TVs a few dozen years ago), and the tubes are robust (supposed to last 10,000 hours) and the amp doesn't overuse them. I have had more problems in my life with mass-produced solid state gear from large manufacturers than with tube gear.
I too, for one, want to try walking down the self-made route a little bit.
I too, for one, want to try walking down the self-made route a little bit.