Hello, I have a coliseum 880 bass head that was given to me, the fiberboard cover was broken in one corner and so when i removed it from the amp i spied two fuses mounted on the plate that cover the massive transformer and they were covered in aluminum foil, now its either a quick fix at a show or something more serious both fuses were different size and i know this should never be done. so first thing i would like to do is replace and go from there ....my question is what value and are they the same thank you Rick