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Message-ID: <995989E45DCA41B299265B9BDD78E18B@JimPC>
From: "James Moritz" <james.moritz@btopenworld.com>
To: <rsgb_lf_group@blacksheep.org>
Date: Thu, 7 Jan 2010 16:01:21 -0000
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DomainKey-Status: good (testing) 
Subject: LF: WSPR reception at M0BMU
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Dear LF Group,

I have been running a dedicated WSPR receiver and PC more or less full time 
for the past few weeks on 502.4kHz "dial frequency" (other frequencies 
possible if requested), with loggings uploaded to the WSPRnet database. It 
is good to see there have recently been a few new countries QRV in WSPR 
mode, including EI6IZ, LA3EQ/P and PA3FNY.

Some info for stations looking at their spots in the database - The 500kHz 
receive antenna here is currently a phased vertical/loop combination which 
is necessary to reject local QRM. It produces a single deep null on a 
bearing of about 90degrees from here. The directional pattern only makes a 
few dB difference to signals from most directions, but obviously signals 
coming from the east , e.g. from ON, PA, DL, are heavily attenuated and will 
show low values of SNR as a result. An omnidirectional antenna would be 
preferable from the propagation study point of view, but unfortunately the 
noise level would be increased by at least 20dB, and many of the weaker 
signals would then be undetectable. So this seems the best option at the 
moment. The WSPR receiver is an RA1792 with an old 400MHz laptop.

Cheers, Jim Moritz
73 de M0BMU