Some of the Michigan radio people who had been in the military, who served various places during the Korean and Vietnam War era, described a set up in Ethiopia where they listened to WJR on a fairly regular basis, especially for Tiger Baseball. They said it was R-390s with large Loop antennas in many cases. Not surprised that you could frequently hear WLS in the Arctic, given that it is a pest in Scandinavia. They might have also used Beverage Antennas.