I searched for the part to eliminate the hum from my stereo, but all I could find online was one for $10 + $7 shipping. So, I called my cable company to see if they’d come install one for me. They told me to Radio Shack and get a Ground Loop Isolator. I did, hooked it up, and the hum is mostly gone. It’s still there when the volume is cranked up real loud, but that could be something else. Very nice.