ULF: 5 characer message detection at 970 Hz

[DK7FC <selberdenken@posteo.de>]

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.

5charEbNaut_970Hz.png
Description: PNG image