Hi I have a ground loop issue. I'm plugged in like this Free sat communial coax (wall) -> Panasonic Plasma TV. Then audio from TV does to Arcam Alpha 2 amplifier via screened RCA leads. Note the freesat tuner is actually built into the TV. There is low hum in the Arcam speakers unless I disconnect the freesat cable at the wall or wherever. Any ideas on how to resolve this? I tried this isolator but retrospectively I don't think it works for satalite systems, it completely cut out all signal anyway: https://www.amazon.co.uk/dp/B07CNQSYJJ/ref=cm_sw_r_cp_apa_i_lg8dCb36VV6M2 Many thanks!