Rfd900+ and tfd900x

Does anyone know if rfd900+ is compatible with rfd900x?

There’s a note on the RFD900X page that says:

Note: Not air-compatible with older “+” series modems with current software.

So I’d say no but I’ve never tested it. I know that X and UX are compatible.

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Allister is correct - they are incompatible. The “X” has so many improvements it’s not worth using a “+” except for on your favourite old “mess around” vehicle.
A “+” is probably going to be better than any cheap radios, and maybe even some new ones - if you already own a set of “+” radios.
But if you have to buy radios, dont be convinced to get “+” instead of “X”

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