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Message-ID: <5.1.0.14.0.20020424153558.00a7c1b0@gemini.herts.ac.uk>
Date: Wed, 24 Apr 2002 16:12:41 +0100
To: rsgb_lf_group@blacksheep.org
From: "James Moritz" <j.r.moritz@herts.ac.uk>
Subject: Re: LF: Jason recording session
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Dear Wolf, Markus, Stewart, LF group,

Thanks for last night's Jason tests - conditions here were rather quiet, 
with the result that I was getting reasonable copy from DF6NM at the 1W 
level - at 0.1W, a trace was faintly visible on the waterfall, but no copy. 
At higher power levels, I had good copy from both stations, both in Jason 
and CW modes I have forwarded some of the data to KK7KA, hopefully the 
internet won't choke on it! I had to use 2 PCs, one for Jason and one to 
record the signal.


I have not used my Jason TX hardware for a little while, but it seems to be 
still OK, so I will hopefully be able to put out a Jason signal this 
evening from about 1730utc onwards. 137.30kHz seems like a good frequency. 
What I will try to do is to start off with about 100W for about 20 minutes, 
then listen for 10 minutes, then reduce power by 5dB to about 30W for 
another 20 minute period, and keep reducing power by 5dB every 30 minutes 
to 0.3W, which should take about 3 hours altogether - unless someone has 
better suggestions? It will take a few minutes to change PSU settings/check 
the output power on a scope.

Hope to see you later,

Cheers, Jim Moritz
73 de M0BMU