Hi all,

Listening to some of the recordings over North America/Europe is quite instructive and seems to conform to a consistent pattern. Station A transmits and holds in the transponder without problems. Station B begins transmitting but drops out two to three seconds later when the transponder tail ends. On rare occasions two strong stations seem to avoid the problem and I suspect this may be because their carriers overlap and SO-67 sees a continuous carrier and does not trigger the transponder tail. This may be a technique to avoid the dropouts. Station A holds the carrier on for a second after a call and station B may be able to overlap with A's carrier and avoid the dropout. Perhaps worth a try.

Alan ZL2BX