[Lowfer] 630 meter WSPR last night

[Douglas Williams]

Well there you go....just a software glitch. Thanks, Paul.

D.

On Thu, Nov 26, 2020 at 5:38 PM N1BUG <paul at n1bug.com> wrote:

> Balloons often use WSPR but this would be the first time I have heard of
> one on 630m. That would be an interesting antenna  challenge. ;-)
>
> I can offer a comment or two from personal experience.
>
> Recent versions of WSJT-X write all call signs and grid squares decoded
> on WSPR to a file called HASHTABLE.TXT. Once a false decode happens the
> first time and gets into that file, it can be more likely for the same
> false decode to crop up over and over. I have seen this many times with
> my 'nemesis' false decode - a particular call/grid combination that used
> to happen quite often with my particular noise profile. If I deleted it
> from HASHTABLE.TXT it would typically be a few days before it came up
> again, but once it did (and was written back into the file) it would
> keep coming up several times every night until I deleted it again.
>
> It wouldn't be unprecedented for the same false decode to occur at more
> than one station. From time to time, perhaps changing with new versions
> of the software, or alignment of planets or who knows what, there has
> appeared to be a slight predisposition to particular false decodes.
>
> 73,
> Paul N1BUG
>
>