Need experienced advice on b-52 at-100 problem

[ezrock]

Amp been sitting for over a year now and tonight I opened it up and had a look. I am no tech but a pretty smart musician and gear head with years of playing and gear trouble shooting. Well upon inspection I found a blasted out section of circuit board right next to the p10 electrical connection post that sits below and between power valves 2-3 counting from the rectifier tube. The blown out circuit board is only on the side the p10 post is on, meaning it did not blast a straight through hole to the other side. The connector is from the output transformer and its end showed scarring and black but I was able to release it from the p10 post. I am almost positive the tube circuit board will need replacing, but what caused this problem and is the output transformer bad now as well? A little history on the amp: played and stored in friends climate controlled basement but I am very suspect as to the proper grounding and stability of the power down there as many of my electronics i.e. mixer also lost power and stopped working. I now have a new amp and power conditioner. Please help and thanks for your valuable time and knowledge.

[booj]

I've worked on a few of those, and I know that if you run the amp in the "Tube A" mode it won't last long. The circuit in that mode runs the output tubes insanely hot. On one unit, about 24 watts idle dissapation on each output tube. Also, if you have problems with voltage, it could aggravate that condition. That's all I got!

[teagansd]

the capacitors on the powers pcb board (which regulates the power flow to the power tubes) are really cheap and they can short out easily and that problem sounds like a side effect of that happening, not completely sure but the same board sends power to the pre amp side of the tube circut board and my PCB board over loaded my pre-amp section and destroyed it so im replacing the whole thing, but as you mentioned, Which was a good theory, that short could have screwed up your transformer but a skilled electrician with a volt meter could tell you if its broke or not!