Re: LF: EbNaut 137.542 kHz

[Markus Vester <markusvester@aol.com>]

Stefan's first transmission started at 23 UT, and less than six minutes were sufficient for a perfect decode ;-)

Good luck all,
73, Markus


-----Ursprüngliche Mitteilung-----
Von: Markus Vester <markusvester@aol.com>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: So, 16. Dez 2018 19:41
Betreff: Re: LF: EbNaut 137.542 kHz

Hi Stefan,

that's nice! I'm curious what you're going to say ;-)

But why not join me during odd half hours? Two Hz spacing will be enough to reliably separate our signals, and Jay could look at both our channels in the same file. And we could leave the even slots to Joe, and anyone else who might possibly want to transmit towards Europe.

I think Joe has actually left the plain carrier on 137477 during odd slots, but I think he is far enough from the U.S. east coast to not cause desense there.

Best 73,
Markus

-----Ursprüngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: So, 16. Dez 2018 19:20
Betreff: Re: LF: EbNaut 137.542 kHz

Good idea Markus,

I just had the same idea because i found a nice message.
So i'm using the even half hours.

f = 137.540 kHz
Start time: 16.DEC.2018  22:00:00.3 UTC (8 hourly repeats)
Symbol period: 1 s
Characters: 34
CRC bits: 3
Coding 8K19A
Antenna current: 4 A
Duration: 30:00 [mm:ss]

73, Stefan



Am 16.12.2018 17:48, schrieb Markus Vester:

Tonight I intend to send a number of different EbNaut messages, commemorating a scientific experiment which ended up changing the world.

Frequency: 137542 Hz
Start times: odd half hours (plus 0.3 s extra delay), Dec 16, 23:30 to Dec 17, 6:30 UT
Format: 7 characters, 3 second symbols, 8K19A, CRC 15 (!)
Duration: 30:00 minutes
Radiated power: ~ 0.4 Watts

Best 73,
Markus (DF6NM)
 

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