Well I tried a KO crystal set as you instructed, but with no luck. I even tried another receiver with the KO radio. The radio has a RF-102F FM module in it which according to everything I have read is a 75 mhz module. So far I have tried two different rx's. One hitec and one futaba with the same results. They both glitch and do not respond to the tx at all. I have sent an email to KO for advice and am waiting for a response. In the meantime I still have the hitec rx. Is there anything else I can try to make this thing work before I send it back?