RE: JR R770 Reciever - Says 72Mhz on bag, 53Mhz on Receiver!! TWICE!
I bought the crystals separately from the receivers. My hobby store only sells the receivers without crystals. So I did buy some 72.810 (CH 51) crystals at the same time. Those were the crystals I put into the receivers. I don't have any crystals on the 53Mhz band. I did try a known good crystal with the same results.
So if we assume the receiver is on the 53Mhz, and just let me point out that the receivers are clearly labled 53Mhz on their labels, I had 72Mhz crystals in them.