The Xmod AM-band receivers do not work with any other AM-Band Tx's or modules except for the Xmod Tx itself. Don't know why they made it this way, but there it is. One option is to put a Mini-Z PCB in an Xmod chassis, something many people have done actually. There are tutorials on here I think, haven't looked in a long time. But I understand you frustration MikeL. I would probably run my Xmods tenfold more if they were compatible with Mini-Z Tx's.