I got an awful hiss coming from my amp when my coaxial feed is hook to my sat decoder. When I unplug this coaxail cable, perfect silence. I plug it, then I can hear the hiss from 10 feet!! I have redone all the grounding of the house, and got a dedicated 20A circuit installed. Everything pass trough a Monster HTS-2500. I have tried to link all the chassis from the pre-amp, amp and sat decoder togethers with copper cables. RF-isolator from Rat Shack doesn't work. Nothing works. I just receive this answer from Jensen about the ground-loop isolators they sell: "Unfortunately, you cannot use a capacitive (VRD-1FF) or transformer (VR-1FF) type isolator on your satellite cable feed. Both types of isolators will interrupt the DC power to the satellite dish and prevent it from operating. You are going to need to isolate the outputs of your satellite dish receiver box instead. We manufacture isolation units for all of the different outputs that your box might have. Dale Roche - Project Engineer"... Great... My sat installer tell me that "to much signals coming trough the dish"...?!?! What does this is suppose to mean?? So what I am suppose to do know??? Someone here was able to solve that kind of loop with a sat dish??