Cable TV receiver induced hum into system


I've read the prior threads which speak about direct pc dish based systems having hum when a ground is screwed up or one omitted. I'm having a similar problem with my cable tv receiver into my BAT S300X integrated amp.

I've tried grounding the box to the amp. It cuts down the hum, but doesn't eliminate it. All the electronics have been tried running through a PS AUDIO 600 or into the same outlet or into separate dedicated outlets.

No change in results.

What am I missing?

Bill E.
lakefrontroad
I had the same problem with my cable hook-up, and I too used a Mondial Magic to break the ground loop and improve the picture. It's an excellent product! :o)
I'm away from home. I'll check which ground makes the difference. I've been looking on line for a Mondial Magic and don't find one. Any ideas?
http://www.amusicdirect.com/products/detail.asp?sku=AMONDBOX
Google has many other hits for "Mondial Magic".
If you want to be sure this is the problem, a cheap way would be to go to radio shack, and buy 2 75-300 ohm baluns. The kind you used to use to hook up cable tv to an old tv with just antenna screws. Take the 2 baluns, and hook them together by the wires. Either clip off the spades and just twist and tape for this experiement, or you could just use screws and nuts.
Now plug your cable feed into one end, and run a new cable from the other end to your cable box. If this eliminates the hum, you have found the source of your problem. Then you might want to spend the money on the Mondial.
John
Here is a link to the baluns from Radio Shack:
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F003%5F010%5F001%5F000&product%5Fid=15%2D1140