VC#@ is already flagged in the file as a common prefix.
73, Pete N4ZR
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at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.
On 4/19/2018 4:10 PM, Fred Kleber wrote:
Might we want to let him know about VC3J?
F
Gee, does this mean that folks will actually have to tune the radio,
listen to the station, and copy the "ingenious" prefixes correctly
rather than just clicking on a spot...:-)
73 - John, W4AU
On 4/18/2018 8:46 AM, N4ZR wrote:
This may be old news to many of us, but VE3NEA's CW Skimmer Server
determines how "skeptical" to be about a callsign, based on a file of
all expected callsign patterns. This assessment in turn affects how
many repetitions of a callsign it must "hear" before issuing a spot.
From time to time, this causes problems for contesters who have gone
out of their way to get a truly unique callsign for use in contests
like CQWPX.? For example, normal Belize callsigns are V31@@ (where @
is an alphabetic wild card), but I have recently been told about the
issuance of a V3@ callsign for contest use.
Revising the callsign pattern file in a truly systematic way involves
getting data from QRZ.COMon the number of "hits" for each callsign and
massaging the data with exotic techniques (exotic to me, anyway) to
turn callsigns into patterns and aggregate the numbers of hits to
determine how common the pattern is.? It's a lot of work.
With a little time remaining before CQWPXCW, I'm offering an interim
fix.? If you have received what you believe to be a unique prefix and
have not used it before March, 2017 (the last systematic overhaul of
the pattern file) e-mail me by May 1 and I will incorporate the new
pattern in the RBN's pattern file distribution, which will be made
available to all RBN nodes by May 10.? I can't promise you that all
node-ops will download the new file before the contest, but the server
will at least "nag" them to do so.
73, Pete N4ZR
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