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Re: ULF: 5 characer message detection at 970 Hz

To: [email protected]
Subject: Re: ULF: 5 characer message detection at 970 Hz
From: Markus Vester <[email protected]>
Date: Sun, 21 Oct 2018 20:11:59 +0000 (UTC)
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References: <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
That's a very nice success Stefan!

I feel the same way about your message contents. Well in line with the announced SAQ activity:

Best 73,

-----Ursprüngliche Mitteilung-----
Von: DK7FC <[email protected]>
An: [email protected] <[email protected]>; Renato Romero <[email protected]>
Verschickt: So, 21. Okt 2018 13:47
Betreff: ULF: 5 characer message detection at 970 Hz

Hi ULF friends,

Last morning i transmitted a 5 character EbNaut message on the 309 km band.
At 970.1 Hz i run 1.7 A antenna current into my 900 m spaced earth
electrode antenna. The transmission took about 3 hours.
The DC resistance was quite high this time, about 93 Ohm. Anyway i got
about the same antenna current when running about 300 W.
The QRN/QRM was low and just a few days ago i added a shutdown option to
my solar charger. The Raspi can turn it off by switching a GPIO Pin, so
the off-time can be defined into a script which is executed on the day
when the transmissions happens...

Best results were obtained from the E fied on its own! I got an SNR > 17
dB! See the attachment for details. The message is important these days.
It should be copied by a lot more people.

This is the first far field message detection below 1 kHz
generated/received by amateurs.

QRB, as usual, 57.6 km.

73, Stefan

PS: It was a great sunny autumn day, just like today.

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