ORIGINAL: mcjustis
The Airtronics was originally ch. 27. I did try switching the crystal on ch 27 (the Airtronics tx) into the JR rx and it didn't work with the Air tx and JR rx. I'm getting lost here...If I can't use anything but JR rx's fine, but surely someone is using other rx's without problems, right??
There's your problem, first you must get proper ch 50 crystals for those old receivers you want to use, an Airtronics ch 50 dual conversion for the Airtronics rx and new ch 50 crystals for the other recivers based on whether they are dual or single conversion receivers. Good luck,
Pete
P.S. It's illegal to change Tx crystals without having the Tx retuned by a qualified service facility in the US