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Date: Tue, 4 Jan 2011 20:11:16 +0000
Message-ID: <AANLkTin5M1-37OR4WkNZuB9YtdsTiBMNw=_ELsF8izC-@mail.gmail.com>
From: Roger Lapthorn <rogerlapthorn@gmail.com>
To: rsgb_lf_group@blacksheep.org
DomainKey-Status: good (testing) 
Subject: Re: LF: WSPR Reports
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Andy,

I'm pleased to report your 137kHz WSPR signal is now consistently coming in
about -12dB S/N at 188km and this is off the side of the loop to a large
degree. PA0A is also several dB stronger, so the preamp in front of the
FT817 is helping.

BTW, F6CNI always gave me great reports on 500kHz and far above that from
others at similar range. I wasn't complaining!

73s
Roger G3XBM

On 4 January 2011 19:17, Andy Talbot <andy.g4jnt@gmail.com> wrote:

> Looking at the WSPR database, F6CNI is decoding me consistently in the 0dB
> S/N region.
>
> At 391km this can't be realistic, and most likely comes from using a narrow
> filter - sub 200Hz - before feeding audio to the decoding software.    The
> WSPR software does need a flat audio response in the 1400 - 1600Hz range,
> and preferably over the complete SSB bandwidth.
>
> Andy
> www.g4jnt.com
>
>
>



-- 
g3xbm-qrp.blogspot.com/
www.g3xbm.co.uk
www.youtube.com/user/g3xbm
<http://vlf_grabber>G3XBM   GQRP 1678    ISWL G11088

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Andy,<br><br>I&#39;m pleased to report your 137kHz WSPR signal is now cons=
istently coming in about -12dB S/N at 188km and this is off the side of th=
e loop to a large degree. PA0A is also several dB stronger, so the preamp=
 in front of the FT817 is helping.<br>
<br>BTW, F6CNI always gave me great reports on 500kHz and far above that=
 from others at similar range. I wasn&#39;t complaining!<br><br>73s<br>Rog=
er G3XBM<br><br><div class=3D"gmail_quote">On 4 January 2011 19:17, Andy=
 Talbot <span dir=3D"ltr">&lt;<a href=3D"mailto:andy.g4jnt@gmail.com">andy=
.g4jnt@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin: 0pt 0pt 0pt 0.8ex; bord=
er-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div>Looking at=
 the WSPR database, F6CNI is=A0decoding me consistently in the 0dB S/N reg=
ion.=A0=A0 </div>

<div>=A0</div>
<div>At 391km this can&#39;t be realistic, and most=A0likely comes from us=
ing a narrow filter - sub 200Hz - before feeding audio to the decoding sof=
tware.=A0=A0=A0 The WSPR software does need a flat audio response in the=
 1400 - 1600Hz range, and preferably over the complete SSB bandwidth.</div=
>


<div>=A0</div>
<div>Andy</div>
<div><a href=3D"http://www.g4jnt.com/" target=3D"_blank">www.g4jnt.com</a>=
</div>
<div>=A0</div>
<div>=A0</div>
</blockquote></div><br><br clear=3D"all"><br>-- <br><a href=3D"http://g3xb=
m-qrp.blogspot.com/" target=3D"_blank">g3xbm-qrp.blogspot.com/</a><br><a=
 href=3D"http://www.g3xbm.co.uk" target=3D"_blank">www.g3xbm.co.uk</a><br>=
<a href=3D"http://www.youtube.com/user/g3xbm" target=3D"_blank">www.youtub=
e.com/user/g3xbm</a><br>
<a href=3D"http://vlf_grabber" target=3D"_blank"></a>G3XBM=A0=A0 GQRP 1678=
=A0=A0=A0 ISWL G11088<br>

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