Hum problem

Jensen *is* Iso Max (Iso Max is the name of the product line). Look at the links. Both are selling the same Jensen VRD-1FF isolator.

A few minutes of your time could save you $50.
Bob_reynolds (Threads | Answers | This Thread)

Not sure about the return policies of the two retailers linked in this thread, but I know Jensen Transformers offers a 30 day return for items purchased directly through them.

I *believe* Markertek's policy is the same, but check it to be certain before purchasing.

Checked cable junction box outside the house, I opened the box and found that they forgot to hook up the ground wire. I hooked up the wire, no more HUM!!!!! Great advice Bob. Thank you everyone for all your help.