Update - after doing some research on what causes the hum I played with my wiring and was able to eliminate it. I was able to use a pre-existing coax ground block and wire it straight to the main ground wire for the house so the cable and HT share the common household ground.

Yay - I can watch the F1 from Bahrain in high def and surround this weekend!

Dan
On-Wall M5HP LCR, QS8 & EP500 in 7.1