[Trlog] SO2R without the 2R

K4RO Kirk Pickering k4ro at k4ro.net
Tue Jul 22 09:47:26 EDT 2003

Operating the NAQP RTTY contest last weekend, I used the
new EXCHANGERADIOS function in 6.73 to achieve a seamless 
SO2R type operation without using a second transmitter. 

My primary motivation was due to the fact that I only have 
one RTTY decoder, and TR-Log has no way to currently control 
two radios in the RTTY mode.

I used TR-Log and a PK-232 on radio 1, and radio 2 was used 
as a receiver only running MMTTY. Both rigs had a serial port 
frequency interface.  I would spot a new QSO (or mult or move 
QRG) on the second RX while running on radio 1.  When the timing
was right, I'd punch the EXHCANGERADIOS key, and work the station 
on the "second" band.  One more hit of EXHCANGERADIOS, and I'm
back to CQing on the first band. 

This same technique could be applied to any one-radio CW or SSB
setup for near-SO2R operation without the addition of a second
TX. It does require a second receiver with computer control.
What a cool and very useful new function.

-Kirk  K4RO

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