What a silly post.
+1,000
Well pardon me all over the place. Pardon me a thousand times. Just a humorous response to the post about a "hunch" above. Silly? Hilarious. No more silly than all the squawking and quacking about what brand amp it is. That is irrelevant. The tubes are being blown due to them being operated at higher voltage than their operating parameters require. That situation has absolutely NO relation to who made the amp. Volts don't care whose factory the device came from. The OP had said the amp has auto biasing which is what I predicted the source of the problem was before he posted whether it was auto bias or user adjustable bias. If you notice, the retired mechanic did not ask "what make of car is it?" before being able to give an educated diagnosis of the problem. The same concept of irrelevance is evident in both cases. You're welcome.
