Help for my Acoustic 140 head

[jinkybox]

Hello everyone, This is my first post here. I have an Acoustic 140 head that I brought in the late 70's. It has developed a hum. I still get the bass signal through when I plug in. I have tried the basics, Checking cables and the bass with other amps, no hum. I think it might be the filter caps in the power supply. I was wondering if anyone would happen to have a schematic for this amp? Any help would be greatly appreciated. Thanks in advance.

[SurferJoe46]

BY no means am I qualified to answer this - but I had the same trouble in an old Peavey PA combo and I just took each cap out and replaced them one-by-one until they were all replaced.

You can read the values on them or meter them out if you know how and buying them is easy with the internet or a close-by Radio Schlack - so that's what I did and it's still running, happy and loud with no more 60~ hum.

Those old paper/wax caps seem to be somewhat troublesome when they get a little dangle-y in the udders.