ORIGINAL: tigerdude426
As long as the TX is compatible with the Receiver I don't see why you couldn't just simply change the frequency of the receiver to 22. Isn't it the crystal and not the receiver that determines the high or low frequency?
No, this is not the case. Especially on older Futaba equipment. The receivers are tuned to perform better on either the low channels (low band) or the higher channels (high band). The newer receivers are tuned more towards the center and can go either direction. But on older receivers you need to observe this. The crystals have nothing to do with this, they are just a crystal.
Ken