Hello Jim-
I have been running my receiver overnight on 160M for a few years now.
I use to see the kind of decodes you mention but they went away for a while.
Recently thought they have returned but infrequently.
I notice them because they are in impossible propagation zones for the time.
IE spots from China in broad daylight. My experience is exactly the same as
yours. Call matches the Grid.
These spots are not on QRZ or any other list. What is the indicator that a
decode is from the second pass?
Since i have the FLEX 6700 usually run two instances on a band and have
noticed turning off two pass decoding results in less decodes on busy bands.
When there are differences in the number of decodes its at the bottom of
the list or a very weak signal, but could be a strong one as well.
I wish the decode list was sorted by frequency, would make it easier to
compare two instances.
Finally, 160M has been very exciting over the last week. Sometimes see as
much as a dozen decodes from EU.
Bill W2PKY
On Thu, Dec 15, 2016 at 3:04 AM, Jim Brown <k...@audiosystemsgroup.com>
wrote:
> 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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