RF module for spectrum?

[erhard52]

Erhard,

The RadioMaster TX16 has a JR-style external module bay.  It requires the XPS transmitter module with the part number XPS-J1.  The XPS-J1 has the pins on the lower side to match the standard JR bay pins.  I use an XPS-J1 module in my Taranis transmitter.

Regrettably, the XPS-J1 has been discontinued for several years now and the only way to get one is used - but you rarely see one come up for sale.  I reckon folks are holding on tight to anything XPS equipment they have.

There is a work-around to use a Futaba style transmitter module that has the pins on top.  I tested it and it works.  You have to set the transmitter to output PPM protocol to the external module bay.  I'm pretty sure the TX16 can output PPM to the external radio module.  You also have to figure out how to mount the module.  But it works!  See this thread for the details:

https://www.xtremepowersystems.net/forum...hp?tid=165

Paul thanks again (also for the link)
suddenly XPS items become collectible items .
i think i will keep my eyes open for a used J1.
you are right the tc16s is also based on the edgeTX 

looks like you have tried all permutations on the planet, great.
i just received the SPM4651T DSMX remote receiver (spektrum) it has a 4 wire cable i assume ground, plus. serial port and ? 
it seems to accept 5V so need for special 3.3V conversion of the X10. i just need to add the proper connector - right.
however somewhere i was reading i cannot bind the remote receiver directly with a master spektrum receiver - any comment?

Erhard