Return to KLUBNL.PL main page

[Top] [All Lists]

Re: ULF: 140 km crossed on the 101 km band, first results

To: [email protected]
Subject: Re: ULF: 140 km crossed on the 101 km band, first results
From: DK7FC <[email protected]>
Date: Mon, 23 Jan 2017 18:01:46 +0100
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
User-agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv: Gecko/20100227 Thunderbird/3.0.3
Hello Vinny,

Yes you can try that. 303.8 km is the record so far. You will need to integrate a long time into one pixel. However i'm not sure if there are propagational effects that makes higher distances harder than expected.

Currently is offline but i found another url offering the same feature: ...shows the location where i received the signal in 424 uHz. Just to get an impression. It is important to have no civilisation in a radius as wide as possible, that's why i'm always staying in the forest. I like it anyway. I used a large loop with 1 turn and 40m circumference. It was in the middle of the forest which is no problem for that band and for the H field.
Best is to install a recording system in the quiet location and then do other things. I had to go into a museum with the YL but it was quite interesting to my surprise ;-)
I have good experience with the Raspi and the soundcards you already own.

73, Stefan

Am 23.01.2017 17:43, schrieb Vincent Stallbaum:
Hello Stefan,
thank you for the transmissions and congratulations to the good results so far!

I've got a peak, too in 4uHz / 63 hour FFT. But on the wrong QRG :'-(

Maybe I'm able to pick up a further transmission /p in my old Volkswagen "Funkemesswagen" in a quiet place...


Am 23.01.2017 16:06, schrieb DK7FC:

The postprocessing of my recording (0...12 kHz) from France is running. The first pixel of the 424 uHz spectrogram just appeared. It shows a peak on the right frequency having about 20 dB SNR! :-) See attachment.

The ongoing postprocessing can be followed at

<Prev in Thread] Current Thread [Next in Thread>