I left my Blues Jr. on the bus for a few weeks and the other day found there was mold growing on the laquered tweed, which surprised me, but then I remembered I was on the Oregon coast and it's very damp and the climate here ruins everything. I took the amp inside and plugged it in to run it for a while, figuring it had sat for too long without being ran. After a minute it buzzed into a crescendo and then the little 2 amp fuse blew. I figured there was possibly some moisture at work so I let it chill by the stove for a night and the heater all day. Put a new fuse in, fired it up, and recieved yet another crecendo of buzzing noise. Got a picture of a redplating el84 tube and turned the amp off before it exploded. Ha. My question is- should I spring for new power tubes- is that the likely culprit? Process of elimination to diagnose the problem, right? Tubes go bad. Or is something more sinister afoot in my beloved backup amp? I've burned thru many tubes but have never blown a fuse before. Anyways, thank you for reading, any thoughts and advice are greatly appreciated.