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