I built this TV re-transmitter. It takes the output from a VCR or such and retransmits it. It works good with the 75 ohm dummy load (good picture and sound, nice 66 Mhz. sine wave output) but when I attach it to a simple dipole antenna the output is distorted and I can't pick up the signal on the TV. I think it's because I can't tune it to the antenna???? Any ideas.