Re: VLF: EbNaut tonite

[Markus Vester <markusvester@aol.com>]

The EbNaut message was decoded at the DL0AO club station near Amberg (JN59VK), where a group around DK1IS and DF9RB are currently in the process of setting up a remote VLF receive system.

Interestingly, the reception occured on a preliminary "antenna", consisting of the braid of a 300 m long CAT5 cable which will later be used to transport the signals from an active E-probe in the forest. This cable is part of a bundle of several other cables which are running along a metal fence and grounded at either one or both ends. Despite considerable local QRM and contaminated shack ground, they had also managed to pick up last week's two-character message from Stefan, as well as some 8270.0025 Hz carriers from here (48 km).

Best 73,
Markus


-----Ursprüngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Fr, 7. Apr 2017 16:30
Betreff: Re: VLF: EbNaut tonite

This evening, another transmission starts. Same parameters...
Let's see if the coil survives. It seems to have to do with the higher ambient temperature. I disabled the ALC now, so the antenna current drops with a rising temperature. Antenne current set to 700 mA again, safety limit set to 650 mA...

73, Stefan

Am 06.04.2017 17:40, schrieb DK7FC:

VLF,

A new Ebaut chance for everyone:

f = 8270.100000 Hz
Start time: 6.Apr.2017   18:00:00 UTC
Symbol period: 30 s
Characters: 5
CRC bits: 16
Coding 16K21A
Duration: 8h, 48m
Antenna current: 700 mA

73, Stefan

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