Cable TV causing system ground problems!

Sfbaydude: I was speaking of cable TV/internet/FM..but not the 75 ohm coax lead from an external FM antenna. It is good that your cable TV input is not causing any concerns with your hi-fi system. Cable TV need not have ground concerns...but often does..and if it does, and your TV is connected in some way to your audio system..it will cause sound quality concerns. With anyone, the easiest way is to find out is just disconnect the cable (and all TV related items/cables) from you audio system..and listen. If your system sounds better with the cable/TV components disconnected..then there is likely a cable TV-ground concern.

Whatdj After reading this thread I checked disconnecting the video part of my hibrid system (TV, VCR CATV) from my HTS-2000 and their interconnects to my preamp/processor and found a much cleaner background and definition in the audio presentation. Worth the try!!!! Currently I'm keeping out of the HTS the AC feed for the video stuff. That kept most of it but the interconnects are bringing some of it back. The TV and VCR have just two prong plugs and I'm going to try a ground connection from their chassis to the grounding rod to see if I can kick it out completely. What do you think?

I think some of the suggestions above are worth the try.. It seems that the ground form the Cable TV feed is usually the concern...usually DC voltage on the Cable ground. If you look at the info that comes with the Monster power strip series...like the model HTS-2000., they give some excellent information on the subject... It appears that Mr. Marsh and Monster are very aware that Cable TV presents real problems for audio systems...

Whatjd, Thanks as always.

Sometimes you get a ground loop when you have a dedicated ground for your system and your 75 ohm antenna or cable is attached to another ground. The easiest and cheapest thing to do is to get two 75 ohm to 300 ohm comverters and attach them back to back, use a voltmeter to test the continuity of the threaded shield, if it breaks the continuity you will eliminate the ground difference, which can be either a big or a small improvement depending on your particular ground problem.