To: | [email protected] |
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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: http://www.arrl.org/news/saq-alexanderson-alternator-transmission-to-celebrate-un-day Best 73, Markus -----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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