Jim-
Thanks for your continued interest,
1. Unplugged all other equipment in vicinity from AC. Amp w shorting plugs only... still hums.
2. Then changed speaker cables...still hums.
3. Then changed aftermarket cord to a heavy duty, OEM-type AC cord w molded on male and female connectors (no idea if I even got an AC cord when I bought amp used)...still hums.
Jim/Al- I'm guessing that we have now isolated this problem to the amp, no?
BTW, RFI was most likely from powered wireless connection to internet for my music server. No change in hum pretty much rules out the server and ancillaries, I imagine.
Thanks for your continued interest,
1. Unplugged all other equipment in vicinity from AC. Amp w shorting plugs only... still hums.
2. Then changed speaker cables...still hums.
3. Then changed aftermarket cord to a heavy duty, OEM-type AC cord w molded on male and female connectors (no idea if I even got an AC cord when I bought amp used)...still hums.
Jim/Al- I'm guessing that we have now isolated this problem to the amp, no?
BTW, RFI was most likely from powered wireless connection to internet for my music server. No change in hum pretty much rules out the server and ancillaries, I imagine.