ive just picked up a masco ME60, am having a hard time finding a schematic for this particular amp. its rated at 60watts from two 807 end cap tubes. my tech has got the amp right now, and is saying that the plate voltage is really high, up in the 800's, and is not sure if this is normal or not. he says he believes it has killed my filter caps. if anybody has any info on this amp, tubes or a schematic it would be greatly appreciated. J Ryan