Band practice yesterday and my Twin started farting ("broken fuzz" type distortion) and volume dropped a lot. Both channels are affected, so I'm presuming it's in the power section. PI and power valves are about two years old and the amp was recapped at the same time (but I know that's no guarantee). Valves are all glowing normally.
So I'll have a quick look at the valves today. Anything else I should look at while I'm in there?
(Damn, just realised I don't have any of 6L6s on hand to test - while I would rather have it rebiased by a pro if I'm going to change them, it means I can't even check to see if it's the power valves before I take it in).
As an aside, was quite proud of my band - even though it was practice, they kept comping through the chord sequence while I quickly verified it was the amp, then I just cranked the piezos, finished the song and quickly swapped in my GT-8 into the PA quickly after the song (I have an amp-only patch I use for headphone practising late at night). Just how I'd want it to go if anything went wrong in a performance. ?
So I'll have a quick look at the valves today. Anything else I should look at while I'm in there?
(Damn, just realised I don't have any of 6L6s on hand to test - while I would rather have it rebiased by a pro if I'm going to change them, it means I can't even check to see if it's the power valves before I take it in).
As an aside, was quite proud of my band - even though it was practice, they kept comping through the chord sequence while I quickly verified it was the amp, then I just cranked the piezos, finished the song and quickly swapped in my GT-8 into the PA quickly after the song (I have an amp-only patch I use for headphone practising late at night). Just how I'd want it to go if anything went wrong in a performance. ?