i folks, thanks for this forum. however the reason why i found it is because my mk iii blue stripe (1990?) simul-class combo started smoking...i'm sure i need new tubes as it's been about 5 years since i replaced them. just to be sure it was nothing else, i opened my amp to take a look. i did find a broken brown-with-stripes capacitor connected to the tube socket. it's broken in half and has that "burned" smell. i just wanted to check with this forum to see if anyone may know why this happened and if it's relatively inexpensive to fix. i'm pretty nervous because i don't have a lot of time or money...i'm going to be touring in two days. thanks in advance!