Columbia 360 "Series B" Amp Repair

[Billrnst]

Thanks for all the advise. So far I've replaced the electrolytic and paper caps (no change) then changed 35Z5GT. Now I have low hum but no audio from the cartridge. Cartridge is working when connected to a known good amp (used aux in on receiver). Next I'll change the 12AX7, will let you know what happens when the new tube arrives.