>> Murtada is a very experienced DXer, and I think he was not hearing a lot of >> the stations because of local QRM. He even mentioned this as a problem, >> which is why he probably did not consider the need to go split.
I concur with Mark's assessment. Murtada was only able to hear stations that were S7 or better, according to the reports he handed out to the few stations he worked. The "plus or minus 200Hz" demonstrates considerable expertise on the part of the callers. They know how to stay in the DX station's receiver passband while not creating an "Internet spot pileup" that would have prevented Murtada from working anyone. There were also several callers up 500Hz and more even before he attempted to evade the QRM by going split. The callers demonstrated DXing skill and consideration for each other by alternating their calls in time, allowing Murtada to potentially start working through the list of callers. Watch "A Beautiful Mind" to see game theory at work. Conversely, someone was transmitting "LSN" at intervals, which was not helpful, as I very seldom heard anyone double with Murtada. 73 -- Brian K1LI _______________________________________________ It is undesirable to believe a proposition when there is no ground whatsoever for supposing it is true. — Bertrand Russell
