This happens quite frequently with some Chinese tubes and other cheaply made ones.I went to top SS amp as i could not deal with this any more i had ARC, CJ etc.Good luck though.However there are some very dependable tube amps out there but there will always be badly bad tubes as well.Good luck.
Tube Failure
Lost a 6550 tube when I turned off my amp. 2 Days ago, on turn off, I got a moderate 'pop' from left speaker. No big deal, but new. Yesterday, after operating all day with out incident, when turned off I got a loud pop. Turned amp back on - no sound. I found there was a tube in the left channel which had failed, replaced it, now amp is back to normal.
In the past I've had all kinds of tube failures but never one on turn off. Any thoughts?
In the past I've had all kinds of tube failures but never one on turn off. Any thoughts?