At the time I started doing SO2R (without computers) and with
manual logging and manual duping (UGH!) in the early 80's
in DX contests, I was not aware of anyone else doing SO2R
as we know it today. A few years later when I started operating
at KM1H (1987) for the DX contests (still manually logging/duping)
as far as I knew, there was still no one in the top-ten doing
To me that means the practice of SO2R had been abandoned.
Or maybe, that the guys that were doing it had moved on to Multi's
and/or other categories of operating by then.
Since it apparently had been so effective a strategy, I was wondering
why so few (if any) people were operating SO2R (one transmitted signal)
at that time. By 1990, quite a few other operators had begun to operate
with SO2R in DX contests and of course we all know how important
and mainstream it has become as an operating strategy since that time.
I remember using a computer to log for the first time as a SOABHP entrant
in the ARRLDX1990 and computer controlling a TS 940 for the first time in
WHAT A DIFFERENCE!