wren

I have a Sears Super Pong w/ no switch box. Using ac adapter for power. I connected the unit to my tv with a "phono-to-F" adapter purchased at Radio Shack (in place of switch box). I believe this is correct, but if not, please advise. Cable coming out of unit is male RCA. Channel switch set to 4. Local tv broadcasts on 4, but right now I can't select 3 on my tv (have to buy new remote - tv has autosearch function to access broadcasting channels only). When I connect then tune to 4, I get sound but no video. Any ideas on whether it's the wrong adapter or just that I need to access channel 3? Thanks!