Although JR does make some dual conversion Rx's its highly likely that your Rx is a single conversion unit. On the other hand its very likely the Airtonics Rx you have is a dual conversion unit. You cannot mix single and dual conversion crystals. Having said that its very poor practice to not use the same brand crystal as the device you insert it in. Even though they may be the same channel, manufacturers contract their crystals to be cut to match their equipments electrical characteristics. Some combinations may work others not at all and with all you are the test pilot.

Please understand that this crystal swapping only applies to Rx's. In the US it is aginst FCC regulation to swap Tx crystals with out a certified retune. There are viable reason for this in the US and it goes beyond just whether or not it works in your radio.

John