LF
Attached is a small screenshot of the WSPR spectral display as received here.
Two WSPR sequences from DI2AF are visible. Also note a pair of what I assume is
local "carriers" wandering around DI2AM - there are plenty of those here and I
can happily spare a few :)
BR
Paul-Henrik, OH1LSQ
Quoting pa3abk <[email protected]>:
> Thanks both (Rik and Paul-Henrik)
> I noticed when I, ehhh the WSPR program decoded DI2AF correctly others
> did that too.
> The sigs where chopped by QRN, SpecLab gave a trace but WSPR didn't
> decode assume he didn't get the sequence correctly.
> I'm using a TS440 which can't switch off the AGC by nature.
> So reduced the gain and turned up the LF gain to get a proper feed for
> the WSPR decoder.
> At the moment there is a small trace visible.
> About Paul-Henrik location, I associated Finland as relatively low noise
> area.
> But assume that the delta loop is doing a fine job.
>
> Tonite there is less QRN will give another run.
>
> Jan/pa3abk
>
> 29-11-2010 14:38, Paul-Henrik wrote:
> > Hello Jan& Gerhard!
> >
> > Regarding Jan's question: There is no secret really, my QTH is not noise
> free by
> > any means. For example 160m is useless for SSB signals much below S7 while
> 600m
> > is way better but far from ideal. Daytime MF reception is poor but the
> > nighttime rise in both QRN and signal strength tends to even out the odds,
> ie.
> > typical suburban conditions.
> >
> > I think the "secret" is simply as you suggest, the abscence of really
> strong
> > in-band signals although DI2AM is still a good signal. I haven't played
> with
> > disabled AGC and RF (IF) gain on 505.1kHz WSPR but should probably do so
> > because I visually note many missed decodes.
> >
> > I'm using an ICOM IC-R75 and a 4x4x4m tuned& amplified delta-loop pointing
> > approximately towards England, hence covering most of the European sector
> of
> > interest while reducing local noise slightly.
> >
> > BR
> >
> > Paul-Henrik, OH1LSQ
> >
>
>
>
LSQ_505_1kHz.PNG
Description: PNG image
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