i have a very old tv with a broken tuner, nothing input by cable can be viewed. it does have rca inputs and i know i can use a vcr to watch cable on it but id like to avoid having to buy one if i dont have to. i do have an old cable box lying around that i could use as a tuner if i only had a way to connect the cable output on that to the rca on the tv. is this possible? thanks.