So I disconnected the coax cable from the Comcast cable box, no change, unplugged the cable box, no change in the hum.
WT_!
Found a 3 prong to 2 prong electrical adapter in my tool box, put it in place and no hum, none what so ever, nada, zilch, nicht!
Lucky me, back to COD or the Nut Cracker Suite.
Thanks for the suggestions!
Jeff