rjr@mgweed.UUCP (Bob Roehrig) (08/22/85)
I have had the same problem with reverse TVI. In my case, the problem set is my own RCA XL-100. While it has a power transformer, the chassis is not isolated from ground. The primary has an autotransformer connection (about 200V I think) that is used for powering the deflection circuits so one side of the line cord connects to the chassis. Besides this, the case is non metallic and offers no shielding at all. A good deal of the radiated horizontal deflection signal is via the AC line and a good grounded line filter will help. You did not state if the TV sets were using twin lead or coaxial antenna systems or connected to a cable system. Mine is fed with 300 ohm line and a TVI preventing type hi-pass filter in the lead-in helps reduce the radiation from the set also. I would think that 20 meter traps in the sets antenna system might help too. Bob K9EUI