No need to buy another receiver. Just need to find a matching set of crystals and you're good to go. Each set of crystals contain a receiver crystal and a transmit crystal. (marked tx and rx) Any channel in the 75 mgh band will work. I think they go channel 62 thru 90 or something like that and they come in even number channels. (62, 64, 66 etc.) But they both must match between the rec. and the radio for it to work properly. Any hobby shop may have some hanging on the peg yet.