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| To: | <[email protected]> |
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| Subject: | LF: Re: XGJ 07-08.jpg |
| From: | "James Moritz" <[email protected]> |
| Date: | Sat, 7 Aug 2010 12:24:02 +0100 |
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| Reply-to: | [email protected] |
| Sender: | [email protected] |
Dear Warren, LF Group,I monitored 137.78kHz last night - I got up around 0200 to see how things were doing, but dense QRN activity in the Baltic was causing a "white-out" of the spectrogram. So I diverted the output of the phased loop/vertical combination I have been using for 500kHz WSPR reception to the 137kHz receiver, and re-adjusted it to null the QRN, which gave about 10 or 15dB improvement, and good copy of your beacon between about 0220 and 0340, when signals faded out. At the left of the attached image, the bright patch shows the appearance of the QRN "before" the phased antennas were used, the rest is "after". BTW, the 500k WSPR antenna is back to normal now... Cheers, Jim Moritz73 de M0BMU
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