JR and Airtronics are "Usually" compatible. They both use + shift on the TX. Futaba and Hitec use - shift (think that's right). Hitec does make a shift selectable RX for use with any TX. Just make sure there are no high or low band issues like with Futaba RXs (putting a ch 10 crystal in a rx for ch 30 and above). You could check with Horizon on this.