Solution to a ground loop problem

Better yet: Get the cable company to reposition and reconnect their ground. Then you won't need a band-aid to block the loop.

Kal

I had this same problem. Here are the two parts you need, total cost $11:

http://www.radioshack.com/product/index.jsp?productId=2103063&cp=&kw=300+ohm&kwCatId=2032057&parentPage=search

http://www.radioshack.com/product/index.jsp?productId=2062059&cp=&pg=1&kw=ohm&kwCatId=2032057&parentPage=search

Connect the cable coax wire to the transformer/splitter.
Connect the wires from the transformer/splitter to the 75-ohm coax combiner/splitter.
Connect the 75-ohm coax combiner/spltter to the input on your TV.
This was done for me by the cable TV guy. Worked like a charm. Why? I don't know. I guess it breaks the ground loop.

The best solution of all is the Mondial Magic Brick. You can get it through Music Direct in Chicago. I had the same problem--the Magic Brick works like a charm.

I had the same problem at one time. I disconnected everything and then carefully reconnected - hum went away. Try it - hope this works for you like it did for me.

Kr4 smacks the bullseye.....he hit the nail with every swing of the hammer. When the cable connections are clean and tight and when the incoming cable (and or equipment) is grounded to the same grounding system as your service panel, voila there is no differential.