but they are a C H E A P crystal controlled "MOPA" with a 6-8 meter long
whip. the ID runs on a cycle like Merv says. The beacons have something
like 36 D cells for power - ballast and cheap batteries
Pics on the VP6DX site of the two beacons we salvaged that had washed
ashore there
they very definitely do not have any "smarts - they don't even have a
receiver of any kind. there are some more expensive models that do answer
only when interrogated, but I believe those are mostly VHF models.
http://www.w8ji.com/ndb%20beacon%20fish%20buoy%20net%20beacons.htm
Link to manufacturer
http://www.ryokuseisha.com/eng/product/marine/buoy/sel_buoy.html
picture http://www.w8ji.com/images/NDB/Fish-net-beacon.jpg
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UR RST IS ... ... ..9 QSB QSB - hw? BK
