[scooby214]

scooby214, hi. I don't think minor hum that you discribe is a problem. As with other things in life we never obtain perfection. A little hum is inevitable. I note that you said the "the large filter cap has been replaced". That set has a 30/25/20 mfd electrolytic, all in one can. Do you mean all three caps were replaced (e.g. large = the entire can) or the large 30 mfd was the only one replaced. All the electros should have been replaced. PL

Great question. All three caps were replaced. The seller did a clean job of soldering them in, but I will have to remove one of them (and later replace it) to provide access to one of the paper caps. I was able to write down the values of most of the paper caps, but I couldn't get to that one. I hope the schematic is accurate.