People on both the QRp and AM discussion lists tell me that
I am hearing a drift net beacon, probably from somewhere out
in the Gulf of Mexico.
I thought the drift net beacons were all gone from that part
of the spectrum, but obviously not. I heard those things
often
in the early and mid 1980s, but haven't heard one on 160 in
many years.
That is probably what it is. I will check the W8JI list of
drift net beacons to see if I can learn anything about the
location of what I am hearing.
Mike Duke, K5XU
American Council of Blind Radio Amateurs