Thanks for your response. However, I do own an av selector by JVC that converts composite signals to S-video (separates luminance & chrominance). I thought maybe it was also possible from a coax signal. But I guess not without a tuner of some sort.
I have a Toshiba t.v. that will not allow me to view channel 3 (a local station) and I can't seem to program the channels so that it will come in. Is there some reason that channel 3 in particular would not be active?