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| 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 0SM6BHZ 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
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