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LF: Re: Re: WSPR threshold reports

To: <[email protected]>
Subject: LF: Re: Re: WSPR threshold reports
From: "James Moritz" <[email protected]>
Date: Thu, 17 Sep 2009 20:29:09 +0100
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Dear Dave, Roger, LF Group,

I have attached a screen shot of WSPR signals from SM6BHZ and G3XBM received just now, using Spectrum Lab set up for QRSS3 reception. The corresponding WSPR spots were:
1836 -12  0.0   0.503925  0 SM6BHZ JO57 33
1840 -27  2.9   0.503890  0 G3XBM JO02 0

SM6BHZ was an audible signal which would have been weak but copy-able CW - I expect Gus's signal will pick up by 10dB or so as the night progresses. G3XBM is never audible at all - the QRN is building rapidly now, but during the day I get 100% copy at about -25 or -26dB; when noise levels build up I sometimes get correct copy at -30dB or so. So that's what it looks like when it is working ;-)
It makes no detectable difference whether I use the SSB filter or 250Hz CW
filter on the IC718 - even the local signals on 500k are not really strong
enough to overload the audio, provided the RF gain is backed well off so
that the S meter reads about s7 or 8. You do need the narrow filter on 136k
of course.
Cheers, Jim Moritz
73 de M0BMU

Attachment: BHZ_XBM_WSPR.jpg
Description: JPEG image

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