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Date: Thu, 27 Aug 2009 13:28:45 +0100
Message-ID: <8bf118410908270528v7875b839j82d2dc979e73e1f6@mail.gmail.com>
From: Dave Pick <daveyxm@googlemail.com>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: WSPR on LF
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I guess we have to decide whether to go for the top or bottom of the band, I
know some areas have problems with strong adjacent channel stuff. Would
135.85 be a good start? (I guess that's well out of Mal's way!)

Dave G3YXM

2009/8/27 Roger Lapthorn <rogerlapthorn@gmail.com>

> As someone who has just got interested in WSPR, I am surprised that this
> mode of personal beaconing has not become extremely popular on 137 and
> 500kHz. The bandwidth is only around 6Hz and the WSPR software is very
> powerful and sensitive. As long as the system is supervised it can be run
> "in the background" whilst other work is going on in the shack. Being an FSK
> modulation scheme it does not require linear PAs.
>
> The main beauty is the ability to have stations around the world listening
> and automatically reporting via the internet to a central WSPR database. It
> means you can see who is hearing you, and who is not, how well they are
> copying your signals and at what times of the day or night.The database can
> be interrogated later and filtered by callsigns etc.  It is perfect for
> comparing antenna systems. The more people that are active then the better
> the "propagation picture" becomes. People can also use the system just as
> listeners and upload logs to the internet automatically.
>
> Getting active on WSPR on HF was extremely simple and the results quite
> remarkable including 14 reports from Australia in a few days on 40m (all 5W
> and one with 2W) - all with just a random 15m of wire from the gutter to a
> small washing line pole down the garden. Results from a well equipped 137 or
> 500kHz station can only be imagined.
>
> There is a summary page about WSPR on my website and links from it to much
> better resources such as that by G4ILO. See
> http://sites.google.com/site/g3xbmqrp/Home/wspr
>
> 73s
> Roger
> G3XBM
>
>
> --
> -------------------------------------------------------------
> http://g3xbm-qrp.blogspot.com/
> http://www.g3xbm.co.uk
> G3XBM    GQRP 1678      ISWL G11088
>



-- 
G3YXM IO92BK Birmingham UK

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<div>I guess we have to decide whether to go for the top or bottom of the=
 band, I know some areas have problems with strong adjacent channel stuff.=
 Would 135.85 be a good start? (I guess that&#39;s well out of Mal&#39;s=
 way!)</div>

<div>=A0</div>
<div>Dave G3YXM<br><br></div>
<div class=3D"gmail_quote">2009/8/27 Roger Lapthorn <span dir=3D"ltr">&lt;=
<a href=3D"mailto:rogerlapthorn@gmail.com">rogerlapthorn@gmail.com</a>&gt;=
</span><br>
<blockquote class=3D"gmail_quote" style=3D"PADDING-LEFT: 1ex; MARGIN: 0px=
 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">As someone who has just got=
 interested in WSPR, I am surprised that this mode of personal beaconing=
 has not become extremely popular on 137 and 500kHz. The bandwidth is only=
 around 6Hz and the WSPR software is very powerful and sensitive. As long=
 as the system is supervised it can be run &quot;in the background&quot;=
 whilst other work is going on in the shack. Being an FSK modulation schem=
e it does not require linear PAs. <br>
<br>The main beauty is the ability to have stations around the world liste=
ning and automatically reporting via the internet to a central WSPR databa=
se. It means you can see who is hearing you, and who is not, how well they=
 are copying your signals and at what times of the day or night.The databa=
se can be interrogated later and filtered by callsigns etc.=A0 It is perfe=
ct for comparing antenna systems. The more people that are active then the=
 better the &quot;propagation picture&quot; becomes. People can also use=
 the system just as listeners and upload logs to the internet automaticall=
y.<br>
<br>Getting active on WSPR on HF was extremely simple and the results quit=
e remarkable including 14 reports from Australia in a few days on 40m (all=
 5W and one with 2W) - all with just a random 15m of wire from the gutter=
 to a small washing line pole down the garden. Results from a well equippe=
d 137 or 500kHz station can only be imagined.<br>
<br>There is a summary page about WSPR on my website and links from it to=
 much better resources such as that by G4ILO. See <a href=3D"http://sites.=
google.com/site/g3xbmqrp/Home/wspr" target=3D"_blank">http://sites.google.=
com/site/g3xbmqrp/Home/wspr</a><br>
<br>73s<br>Roger<br>G3XBM<br><font color=3D"#888888"><br clear=3D"all"><br=
>-- <br>-------------------------------------------------------------<br><=
a href=3D"http://g3xbm-qrp.blogspot.com/" target=3D"_blank">http://g3xbm-q=
rp.blogspot.com/</a><br>
<a href=3D"http://www.g3xbm.co.uk/" target=3D"_blank">http://www.g3xbm.co.=
uk</a><br>G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088<br></font></blockq=
uote></div><br><br clear=3D"all">
<div></div><br>-- <br>G3YXM IO92BK Birmingham UK<br>

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