Well, after experimenting some more...let me try to provide some additional information.
My current setup:
36" CRT Television DVD player - SVHS output to the A/V A/V receiver SVHS output to the Television Cable plug into the TV
In this setup, there are major interference lines in the TV anytime the subwoofer bass kicks in. This is when I'm watching the DVD video playing the DVD audio. Now, if I switch the video to the cable input (while still playing the DVD audio), I do not notice any interference lines in the TV when the Subwoofer draws powers.
Next, I switch the A/V receiver to play audio from the FM tuner. I switched the video to display the DVD video. The TV interference lines still present.
I then changed the setup by taking the DVD SVHS output and going directly to the TV input (bypassing the receiver). I kept the A/V receiver audio output on the FM tuner, the interference lines where NO longer present. I then switch the a/v receiver to the DVD audio, the interference line were slightly present but only at high volume scenes.
Unplugging the cable from the TV had the same result.
In all cases, the cable video didn't seem to be affected by the subwoofer. (When I turned on a power drill or large appliance on...in that cases....a few white specs appear in the tv....but this is very slight.)
I did notice when I plugged the cable into the TV...the subwoofer makes a hum/buzz when the subwoofer's volume is turned high. Removing the cable, I can turn the subwoofer's volume to max and no hum or buzz at all. So, this may be a different problem. Maybe a ground loop issue?
During all my experiments, there were no diming of the lights in the house. The speakers play clean without any static.
Note: I did try plugging the TV and DVD player into the UPS and have it run competely off the battery. But, I'm unable to plug the A\V receiver and have it run off the battery without causing an overload condition. I still got the interference lines when playing the DVD audio thru the receiver as mentioned above.
I'm not sure how the house is wired, so I can't comment on that yet. House built in the early 80's.
Anyway, hopefully the extra information will help. I'm still unsure what I should try next to eliminate the problem. Obviously, I can route the DVD video directly to the TV to minimize the issue...but that still doesn't correct the problem.
Any help or additional suggestions will be appreciated. Thanks! PC