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| To: | <[email protected]> |
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| Subject: | LF: Re: VLF Transmissions - G3XIZ - 12th / 13th February |
| From: | "James Moritz" <[email protected]> |
| Date: | Thu, 10 Feb 2011 21:27:20 -0000 |
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Dear Chris, LF Group,I will have the receiver running for your signal this weekend - I'm not sure what times I will be at home, so reports may be delayed. I agree with the other comments re QRSS60 - this will severely limit your potential audience, so stay with the continuous carrier and cut the PA DC supply to provide some on/off ID. The 8.976 66 kHz frequency is probably a good one at this QTH - the attached spectrogram shows a few hours of typical noise at 8970 +/- 50Hz here, and your chosen frequency is reasonably clear. BTW, the wild zig-zag in the image is a mains harmonic that is nominally 8950Hz, but sometimes gets to 8970 or above. The intermittent comb of more stable spectral lines is a mysterious local QRM source, which on the speaker sounds a bit like a large diesel engine on idle! Cheers, Jim Moritz73 de M0BMU
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