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Re: VLF: 300 mA on 4470 Hz, 67 km band

from [DK7FC] [Permanent Link][Original]
To: [email protected]
Subject: Re: VLF: 300 mA on 4470 Hz, 67 km band
From: DK7FC <[email protected]>
Date: Mon, 22 Jan 2018 11:04:19 +0100
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Hello Paul,

Thanks again for the recent summaries.

Am 21.01.2018 13:31, schrieb Paul Nicholson:

The average S/N so far at this frequency is distinctly better
than at 5170 Hz.

Todmorden: 5170 Hz -28.1 dB/1Hz;
           4470 Hz -26.5 dB/1Hz;

Cumiana: 5170 Hz -31.0 dB/1Hz;
         4470 Hz -26.2 dB/1Hz;
Yes, it seems to confirm the assumption that frequencies arround 4 kHz work quite well in 'short' ranges, maybe < 2000 km, because the far QRN is much more attenuated than on higher or lower frequencies. A typical nightly noise distribution capture is in attachment.. 
Relative to 5170 Hz, my ERP is 1.26 dB lower on 4470 Hz.
67 km wavelength, amazing. I like it!
Today Alex will go to the garden again, he said...

73, Stefan

Attachment: wald1.jpg
Description: JPEG image

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