Peavey Valveking Vk100 Guitar Head "tube training" Questions

at loud volumes like rehersals and it only has had been used like 15 times. Sounds like one of your tubes going bad and becoming microphonic...Google "Microphonic Tube" for additional info

i tried to plug in a digitech bp200 pedal and then my amp went on the fritz and starterd buzzing loudly. I attempted using the effects loop section on the back of the amp with my bass direct into the ...

...for the shops to find... the thing will sit for weeks and work while on the bench. This does have a tube in it, and I am sure that has been replaced, but that is the first thing to replace as the ...