[catliNZ]

Upon revisiting this problem I got compiler errors relating to the tx source code. I must have hit the wrong key at some time.
Once that was corrected I could enable debug output
#define ENABLE_DEBUG
#define DEBUG_ID4
and get results on the serial output with
#define ID4 1

Commenting out the debug defines caused the original problem of no startup to reappear. 
If the #define ENABLE_DEBUG is left enabled (with //#define DEBUG_ID4) then the tx works correctly.

System now working as it should. Though may have to wait till summer to get some decent sunshine.
Ian