Re: VLF: 4470.0025 Hz

[DK7FC <selberdenken@posteo.de>]

Hello Markus,

Wow, the peak was up to 20 dB in 28 uHz! Not bad at all. See attachment
That would allow to send a 5 character message in a few hours, e.g.: http://abelian.org/ebnaut/calc.php?sndb=20&snbws=0.000028&snmps=&code=16K21&sp=40&crc=8&nc=5&submit=Calculate

Tell me if you like to try, i would need to prepare SpecLab to listen on that frequency for EbNaut...

Paul, is your E field ready again for a longer message? The QRN is much lower now :-)

73, Stefan


Am 05.09.2017 22:37, schrieb Markus Vester:

The carrier was on from 8:26 until 20:00 UT, with one interruption from 17:18 to 17:54 when I had to place the coil assembly into another larger bin to improve sound damping.

The noise background was unusually low today. At the end of the day, we were greeted by a beautiful peak in the dedicated 28 uHz window from the tree in Heidelberg. Thank you Stefan!

Best 73,
Markus



-----Ursprüngliche Mitteilung-----
Von: Markus Vester <markusvester@aol.com>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Di, 5. Sept 2017 10:49
Betreff: VLF: 4470.0025 Hz

Since 8:26 I'm running a carrier on 4470.0025 Hz again. Currentis  0.2 A now, slightly higher than before.

73, Markus (DF6NM) 

4470_DF6NM.png
Description: PNG image