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.
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