Heathkit AP-1800 Preamp right channel quit working


2019-10-09 12:44 pm
I have a Heathkit AP-1800 preamp that the right channel quit working. I have a schematic but need a service manual and operators manual. Even a build manual would be helpful. Does anybody have one of these manuals they could scan and send me or a manual I could buy? Any thoughts on what might be wrong in the preamp? Thanks.