[Lowfer] 8822 Hz on at 2200Z

[Douglas D. Williams]

Well done, Garry! That's pretty convincing.

D. KB4OER

On Thu, Dec 18, 2014 at 12:07 AM, Garry Hess <k3siw at sbcglobal.net> wrote:
>
> Dex,
>
> Thanks for braving unexpected tones in your head to keep sending on 8822
> Hz!
>
> My quietest eprobe is the one on the roof, not the one in the back yard. I
> connected the former to my sdr-iq that is externally clocked by a GPS
> reference (I had been using my other sdr-iq which runs off an internal XO
> clock) and extended Spectrum Laboratory to a 131k FFT. That seems to have
> done the trick.
>
> Since acquisition I've seen a peak very near 8822 Hz and clearly above the
> noise floor. Not the good SNR shown at http://46.4.26.83/sp8822_vlf35.png,
> but that path is only 164 miles versus my distance of 633 miles.
>
> My soundcard sampling rate for Spectrum Laboratory hasn't been calibrated
> for awhile so it's not surprising that both the peak at 8822 Hz and 8822.1
> Hz from my GPS-locked SLM show errors of 0.002 Hz, but 0.2 ppm isn't too
> bad.
> --
> 73, Garry, K3SIW, EN52ta, Elgin, IL
>
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