Hi Team,

For several weeks, I've been letting WSJT-X rc3 run overnight on 160M 
while I sleep, and tabulating the decodes the next day. I've been quite 
pleasantly surprised by the activity -- in less than a month, I've 
decoded about 450 different stations running JT65 or JT9. More than a 
dozen are from outside North America, about half of those from western EU.

The reason for this post is that I've also seen a half dozen or so 
decodes that appear to be false. Looking more closely, I see that most 
are second decodes finding the signal underneath another one that 
decodes correctly.

I haven't done enough analysis to say that ALL second decodes are bogus, 
but nearly all of the bogus decodes are on second passes. On each of 
them, I can't find the call on qrz.com, the call often doesn't make 
sense, and the time of day doesn't support propagation to me (near San 
Francisco) from the received grid square. BUT -- the grid square usually 
roughly correlates with the country associated with the call (which is 
usually a non-standard prefix for that country).

73, Jim K9YC


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