Eliminate system hum


I have a tube system I have set up next to my TV but now have a pretty good hum. I have tried all the usual thing to get rid of it. Any suggestions other than moving it away from the TV? Why does the TV cause this with tube pieces and not with solidstate pieces?
tapin
05-31-06: Elescher
If your Cable TV is run through your system, try disconnecting all cabeling between the two and see what happens

In my system the hum is clearly caused by the cable tv, disconnect the cable and hum goes away. Unfortunately I live in an area where there is NO TV without cable. I live in a gorge in the Santa Cruz mountains and am surrounded by trees so I can't use sattelite TV either.

Any ideas on how to get rid of the hum caused by cable tv
Post removed 
I had the same problem. Caused by cable tv coax cable. Try taking the coax cable out of the cable box. Then turn on your system and see if the hum is still there. But don't unplug the cable box from the wall. This will not do. You need to take out the coaxial cable that runs into your cable box, or whatever its first point of entry is.
I fixed this problem in my system with MONDIAL - MAGIC BOX. Bought it at musicdirect.com. No impact to picutre quality that I can detect. But the annoying hum noise is gone.
follow the link to check it out....
http://www.musicdirect.com/products/detail.asp?sku=AMONDBOX
I had the same problem with my video side causing hum.
I put a passive filter between the video side, going into my main AV processor, then into the main amp.

The passive filter takes RCA's in and out, and it's called a "buzz off", by ROLLS. You can find them in Guitar Center or other music stores, guitarists use them to cut down hum.

It works well in stabilizing my system, as I run my video side into the audio side, through my Quad amp, for surround sound.