I was playing a show last night and shortly into the first set my VT-22 felt like it was losing volume. Halfway into the set I knew something was really wrong. Two more songs went by before I had the venue owner asking me to turn up my gain. Too bad my amp was already on ten! As an aside, he was incredibly helpful all through the night, especially with fine tuning the FOH mix because we ran our own sound. I wish more people around here were like him! I managed to limp through the first set out with a very distinct lack of power. I decided to play it safe and went direct to PA for the next set and a half. It was a tremendous success and had we not brought our own PA, I would have been SOL. I think I might have just learned a valuable lesson about not having a backup amp! Frankly, the failure was probably my own fault. I bought my VT-22 off of craigslist with mismatched output tubes and in overall unknown condition. I opened it up, gave it a visual once over, and didn't think much of it. The amp sounded strong and didn't hum so I decided to just risk it. It made it through about 50 hours of hard use and well, you know the rest! Moral of the story, service your old tube amps when you buy them or you might end up like me.