Brian I have converted two ritron responder., model rr-450 They work good., but internal duplexer is right on the edge., an external one would work better., (out of range)., as they are indeed 450-470 mhz
Jerry VE3 EXT
Brian I have converted two ritron responder., model rr-450 They work good., but internal duplexer is right on the edge., an external one would work better., (out of range)., as they are indeed 450-470 mhz
Jerry VE3 EXT