Re: VLF: Now on 5170.0025 Hz

[Markus Vester <markusvester@aol.com>]

Thank you Stefan! Yes indeed, I'm glad to see a solid trace on your EW tree-antenna. Having a sensitive grabber within reach is rather motivating.

Attached is a pic of the coil preparation, a temporary "ugly construction" with some chunks of ferrite inside. In the meantime the current has dropped to ~ 0.15 A due to self-heating of the thin wire but it seems to be stable now.

Best 73,
Markus (DF6NM)


-----Ursprüngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: So, 12. Mrz 2017 12:57
Betreff: Re: VLF: Now on 5170.0025 Hz

Hello Markus,

It looks like you are there!! Even in 424 uHz. Very good, my congrats! You are the second station transmitting on 58 km at all!
EbNaut should be no problem there, good luck.

73, Stefan

Am 12.03.2017 12:26, schrieb Markus Vester:

I've managed to tune to 5.17 kHz and am sending a straight carrier since 11:18 UT. Due to the high coil resistance the antenna current is only 0.18 A (as opposed to 0.4 A on 8.27 kHz, thus 11 dB less ERP). I wonder if the signal may show up in Heidelberg...

Best 73,
Markus

stacked_coils_5k17_170312.jpg
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