mc60

Hi All, Long time lurker and first time poster who would appreciate your thoughts and advice on restoring a pair of MC60's I picked up for a soon to be winter project. My initial plan was to do a more or less full'ish restore ... new electrolytic caps, switch the bias rectifier out, look to...

I have my old MC 60 on the bench for a checkup... it is serial #3144. I have an old Sam's Photofact schematic with no serial number reference that says the plate voltage should be 405 VDC. I also found a copy of a McIntosh manual for serial numbers 1858 and up that says that the plate should be...

I am recapping a pair of MC60 amps for a friend and the serial numbers are 3XXX and 7XXX there are lots of differences between these two amps. The board layout is completely different and the bias section is different as well. The first amp I replaced the selenium rectifier with silicon and...

I have noticed that this amp has 80uF of capacitance right after the two 5U4 tubes. Wouldn't this amount of capacitance cause arcing of the rectifiers? Has anyone changed this when replacing the capacitors in this unit? Would it be better to reduce the input capacitance? I plan to replace the...