Serious hum problem. Help

A quick trick to try and see if this is a ground loop through your cable (almost definately is) is to hook up two of those old adapters that convert from 300 ohm antenna wire to 75 ohm f connector (you know, the ones that came w/VCRs. hook them up to each other back to back, so that you can hook up coax to each end of the pair and place them in line btwn the TV and the cable coming in. you should get a significant reduction in hum. Then go for the jensen or the mondial magic, or even the $0 rat shack cable isolating transformer and you should be good to go.

I had a similar problem and the ground loop isolator (below) solved it completely. Only $18.

http://www.mcminone.com/product.asp?catalog%5Fname=MCMProducts&product%5Fid=33%2D8700

Bd -- that's the cheapest one I've seen so far -- good show!!

BTW - no matter what isolkator you use, make sure to ground the antenna or cable company side of the isolator to a good ground.

One other idea occurs to me. If your TV has a 3 prong plug try a cheater that eliminates the ground and see if that solves the problem. Also you may check where the cable enters the building and see if they(cable company) used a grounding block and check that connection. Just another idea.