LF: Re: Re: WSPR threshold reports

["James Moritz" <james.moritz@btopenworld.com>]

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

BHZ_XBM_WSPR.jpg
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