I'm not sure about that eddy. I went with a friend to buy some crystals and they asked him what brand of radio it was. He has an Airtronics M3. It also is FM 75mhz. I own the new synthesized JR so I have no need to buy crystals
I went to my LHS today (got my Savage) and they said that they didnt know either? They always just recomend using the same brand as the TX? I bought my Radio there so they stock the JR crystals.