Message-ID: <000701cd95b4$6bc8b520$0501a8c0@xphd97xgq27nyf>
From: "mal hamilton" <g3kevmal@talktalk.net>
To: <rsgb_lf_group@blacksheep.org>
References: <50589124.1040508@iup.uni-heidelberg.de>
Date: Tue, 18 Sep 2012 15:43:59 -0000
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Subject: LF: Re: WSPR tests by DK7FC
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Stefan
Faster speeds are BEST not slower
I am working on Fast Bursts of CW
I will have been on the frequency made a contact and gone before you get
started !!


Mal/G3KEV

----- Original Message -----
From: "Stefan Schäfer" <Stefan.Schaefer@iup.uni-heidelberg.de>
To: <rsgb_lf_group@blacksheep.org>
Cc: "Joe Taylor" <joe@Princeton.EDU>; "Edgar J Twining"
<edgarjtwining@virginbroadband.com.au>
Sent: Tuesday, September 18, 2012 3:20 PM
Subject: LF: WSPR tests by DK7FC


> Dear LF group,
>
> A few days we started a discussion about a slower WSPR here in the
> group. After that, i've been in contact with K1JT who meant he will work
> out a slower WSPR version for LF, in a few months (hopefully).
>
> Markus/DF6NM kindly prepared a tool to generate different types of WSPR.
> There are 3 versions. The first takes 2 minutes, i.e. the normal WSPR
> that can be decoded with the normal WSPR software. Then there are slower
> versions taking 8 and 32 minutes.
>
> We want to make some pre-tests to see the SNR improvement of a slower
> WSPR, i.e. check if it will be confirmed by the SNR display that WSPR-8
> shows a 6 dB better SNR (12 dB SNR improvement for WSPR-32 respectively).
>
> Hopefully this will result in a new DX-mode on LF (Yes Mal, i know :-) ).
>
> So now i joined the WSPR group and start to do some test transmissions
> with the normal 2 minute WSPR code, using Markus' tool. The goal is to
> see if the tool works properly and what decode levels i can obtain in
> various distances.
>
> A 2 minute WSPR beacon is running here in Heidelberg / JN49IK, 50% TX
> time. I will run it until tomorrow 6 UTC.
>
> Reports apprechiated :-)
>
> Please can we try to move the LF reports/hour peak in the diagram above
> the level of the 20m band? ;-)
>
> Tests using the 8 and 32 minute WSPR will follow soon.
>
> 73, Stefan/DK7FC
>
> PS: TX pwr may be a bit reduced in first tests, abt. - 10 dB f.s.
>