Need advice - interference - cable signal to CRT

[1koolcat]

Hello,

I share a cable TV connection between two television sets. The signal comes into the basement near my (nearly) new PANASONIC plasma set. I split the cable signal three ways.

First cable (short) goes to my plasma set.
Second cable (short) goes to my vintage PANASONIC VCR.
Third connection goes through the wall into the laundry room - up through the ceiling to the upstairs CRT television.

The picture on my plasma set is crystal clear.
The picture through my VCR tuner is decent.
The picture on the upstairs TV has some kind of EMI showing up on the screen, but I can't figure out what's causing the interference. The interference squiggles remind me of someone running a vacuum cleaner or an electric mixer nearby.

A buddy helped me make the long cable for the run going upstairs. We made the cable long enough so it has a bit of slack in the middle. We coiled up the extra cable and left it hanging from the laundry room ceiling. (about 6 loops)

The cable does pass near some romex in the basement ceiling.

Could the looped coax cable be the problem?

Could the Home Theater amp or DVD player sitting above the CRT TV be an issue?

Your ideas/suggestions are welcome.