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Shortest Callsigns and Shortest Morse Code Duration Calls


By Matt - Posted on 10 May 2009

With my recent license upgrade to Extra I decided to apply for a shorter vanity call sign.  I soon realized there were a lot of complicated rules involved in selecting a call as well, but after many mistakes I managed to get a good call, AI1P.

Both short in length and short in Morse code so that I could spend a little less time on my cq’s and all transactions. A few dits/dahs will probably add up over a lifetime right?

So I wrote a few scripts.  The basic strategy is to generate all possible permutations of possible legal callsigns and then filter out all of the ones that are taken.  The FCC produces a list of all callsigns in use, so that job was pretty easy.

I then wrote a basic weighting algorithm for calculating the total number of dits and dahs in the morse code version of each callsign and sorted them by that weight. Interestingly the shortest callsigns in morse code terms (10 binary characters) that are currently available are the 5 character types in the General/Technician class level. Though there are only 7 of them as I post this!

Also a surprising number of A*** signs are available, around 1500 4 letter Extra class callsigns in total.

I also added filtering so that the rules published by the FCC for no-no callsigns were respected, further reducing the junk level, and made a nice web interface for people to download them with.

Since it took me some work to set up I am charging a small fee for the service which can be paid by Paypal, after which you can immediately download the information. The callsign lists will be updated automatically every week.

You can try it out here:
http://www.geniusweb.com/callsigns/order.php

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