[Dx4win] DX4WIN Master Callsign list updated 22 January 2016

[Jim Reisert AD1C]

> The DX4WIN Master Callsign database was updated on 22 January 2016.  It
> contains 0 callsigns and was generated by Club Log on 22 Jan 2016.

There was a software problem with the announcement.  The database
actually contains 175333 master callsigns.

This list used to contain over 230K callsigns:

    http://dx4win.ad1c.us/data/calldata.html#Master

Club Log was using an inadequate filter which allowed many busted
callsigns to "make the cut".  Now, a callsign must appear in the Club
Log database at least 40 times, previously it only required 20 QSOs.

The Club Log "super check partial" database also contained a few dozen
duplicate calls, which have now since been eliminated, once I reported
the problem.  Finally, my software eliminated another 8K of bad
callsigns which it determined through several different heuristics.
The new list is much cleaner now.

73 - Jim AD1C

-- 
Jim Reisert AD1C, <jjreisert at alum.mit.edu>, http://www.ad1c.us