My stereo-8 radio does not ever pick up a signal. When I hit the "seek" button, it just runs through the channnels without stopping. The power antenna works fine. I recently tried a radio from an '84 CDV that has been reworked by a pro radio shop, and I couldn't get that one to do any better. Could something in my antenna be wrong? The 8-track part of the radio works great, but the stereo part that plays radio songs won't ever find a good signal.