I need help with a '63 Fender Concert

[War Admiral]

I was taking measurements of the plate resistors and I found one that was overload and pulled it out and it crumbled in my hands. I found another 100K and put it in and fired it up and it did the same thing. I tried taking a measurement of the resistor I just place and it was like a meg or something???? How can I check if the cap is short?

Could the bypass cap be short and fried the first resistor? Heres a pic of the resistor that was fried and I replaced along with its bypass cap.

[IMG:800:600]http://i46.photobucket.com/albums/f144/ ... 1paint.jpg[/img]

[War Admiral]

edit

[Firestorm]

I was taking measurements of the plate resistors and I found one that was overload and pulled it out and it crumbled in my hands. I found another 100K and put it in and fired it up and it did the same thing. I tried taking a measurement of the resistor I just place and it was like a meg or something???? How can I check if the cap is short?

Could the bypass cap be short and fried the first resistor? Heres a pic of the resistor that was fried and I replaced along with its bypass cap.

[IMG:800:600]http://i46.photobucket.com/albums/f144/ ... 1paint.jpg[/img]

Those Mallory coupling caps will almost never go bad. Even if they did, the problem would be downstream of those plate resistors. Get some known-good 100Ks (1-watts would be best) and replace the all the plate resistors. The one that crumbled HAD to be making a lot of noise.

[War Admiral]

FIXED!!!! YES!!!!!!!!!

Thanks for putting up with me guys. I got assbackwards for a while but got on the right track. There was another plate resistor in the preamp section with a hairline fracture because it read fine but he was the badass.

New powersockets, powersupply caps, 2 plate resistors, 2 coupling caps and she's like new!
Thanks again.
Chris.

[Firestorm]

Yeah!!! And I'll bet she sounds killer!

[War Admiral]

Thanks especially to you Firestorm for taking the time to help me. It sounds killer! Smooth, twangy and round. I think I'll be putting my Marshalls away for awhile.