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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*VLF\:\s+8819\.9\s+Hz\s+in\s+Virginia\?\s*$/: 9 ]

Total 9 documents matching your query.

1. VLF: 8819.9 Hz in Virginia? (score: 1)
Author: Paul Nicholson <>
Date: Thu, 11 Dec 2014 19:25:48 +0000
A signal appears close to 8819.9 Hz at Forest VA. Doesn't look like Dex, frequency is not stable and not exact multiple of 0.1Hz. http://abelian.org/vlf/tmp/141211a.gif AA5BW perhaps? It would be qui
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00097.html (8,927 bytes)

2. Re: VLF: 8819.9 Hz in Virginia? (score: 1)
Author: Paul Nicholson <>
Date: Thu, 11 Dec 2014 19:45:56 +0000
In a bandwidth more suitable for the width of the signal http://abelian.org/vlf/tmp/141211b.gif I think this is probably Dex running without GPS lock, the frequency offset is about right for the free
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00098.html (9,373 bytes)

3. Re: VLF: 8819.9 Hz in Virginia? (score: 1)
Author: Paul Nicholson <>
Date: Thu, 11 Dec 2014 20:10:44 +0000
And neither is Dex so we have a mystery signal! Tomorrow I'll look back over the 10 day recording loop. Meanwhile the spectrum plot updates every 10 minutes at http://46.4.26.83/sp8820_vlf35.png -- P
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00100.html (9,458 bytes)

4. Re: VLF: 8819.9 Hz in Virginia? (score: 1)
Author: Paul Nicholson <>
Date: Fri, 12 Dec 2014 08:24:36 +0000
Spectrogram covering 24 hours yesterday http://abelian.org/vlf/tmp/141211c.gif A wandering signal from a crystal source of average stability. These are fairly common when you dig deep enough into the
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00106.html (9,709 bytes)

5. Re: VLF: 8819.9 Hz in Virginia? (score: 1)
Author: "Markus Vester" <>
Date: Fri, 12 Dec 2014 09:47:12 +0100
Hmm 8820 Hz is a 60 Hz multiple, so maybe not the best choice for American observers. On the other hand, the trace at Forest seems to be too stable for a direct mains harmonic. What I often see here
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00107.html (11,674 bytes)

6. RE: VLF: 8819.9 Hz in Virginia? (score: 1)
Author: <>
Date: Fri, 12 Dec 2014 10:17:42 -0500
Paul, I've been monitoring near 8820 since Dex's prior transmission (assessing and mitigating noise in case Dex switches on again). I don't have good absolute-frequency calibration at this northern V
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00110.html (12,155 bytes)

7. Re: VLF: 8819.9 Hz in Virginia? (score: 1)
Author: Dexter McIntyre W4DEX <>
Date: Fri, 12 Dec 2014 10:43:17 -0500
I've been monitoring near 8820 since Dex's prior transmission (assessing and mitigating noise in case Dex switches on again). Jim, I was testing yesterday afternoon and evening on several frequencies
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00111.html (11,367 bytes)

8. Re: VLF: 8819.9 Hz in Virginia? (score: 1)
Author: "Markus Vester" <>
Date: Fri, 12 Dec 2014 17:12:04 +0100
Hi Jim, resolution (715 uHz bin width), Your resolution is actually similar enough to Paul's 833 uHz bins, and the excursion on the unid signal (around 0.010 Hz, not uHz) would be clearly visible. Co
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00112.html (14,367 bytes)

9. Re: VLF: 8819.9 Hz in Virginia? (score: 1)
Author: wolf_dl4yhf <>
Date: Fri, 12 Dec 2014 20:25:40 +0100
Hello Jim, you asked: resolution by accessing a data file, or perhaps by opening a new waterfall-display window? Only if you logged the input ("audio") as file, *.wav or *.ogg. From the spectra which
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00114.html (10,550 bytes)


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