whom do i get to fix a ground loop hum?

The Magic is a better solution in many, but not all, cases. It worked for me for years but seemed to interfere with my DMX reception. However, when I removed it, the hum returned. My cable technician, despite professing ignorance of anything like cable-related ground loops, did agree to relocate and link the cable ground to the main ground.

Voila! No need for the Magic box or any other. No hum, either.

Kal (who prefers to fix the problem, not cover it up)

I am using this:
http://www.jensen-transformers.com/datashts/vrd1ff.pdf

It has cleared up the hum on my home stereo (with cable box) and on my PC's speakers (cable modem). However, it messes with the Comcast digital music channels. I am trying find out why...

Re: http://www.jensen-transformers.com/datashts/vrd1ff.pdf

I just spoke with a Tech at Jensen. He advised me to move the transformer closer to the outside feed. I removed the wall plate and installed it behind there. The DMX channels came back!!!!

PS It's only $60.

Do you still get the hum if you unplug the cable from the wall outlet?

thanks men, i do prefer the issue to be fixed, not just covered, but, who knows if the cable tech will be willing or even know how to change the ground link. i will contact them. if not, the magic will be the solution, thank you all bcuz i was not aware of the product.