Well I have found that I have a ground loop problem coming from my coax cable. I have tried to ground the coax at the point it enters the home but that didn't work. I have been searching the internet for a CATV Isolator but I haven't been able to find one that is over 1ghz and I take it from...

Hi, I have ground loop hum and am busy checking potential loops. One thing I see is six HDMI cables connected to my AVR (4 sources, 2 displays). Three of these six devices are mains-earthed. Which says to me there are 3 redundant earth loops I would like to isolate. If these were all analogue...