Message-ID: <59B7CBC3.6040406@posteo.de>
Date: Tue, 12 Sep 2017 13:57:55 +0200
From: DK7FC <selberdenken@posteo.de>
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To: rsgb_lf_group@blacksheep.org
References: <15e6225a59f-c0d-51712@webjas-vaa152.srv.aolmail.net> <59B432AA.5060007@posteo.de>
In-Reply-To: <59B432AA.5060007@posteo.de>
Subject: Re: VLF: 15 charaters on the 67 km band...
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I'd like to shorten that transmission experiment a bit. For a decode 
from Paul or Jacek it may take 2 weeks of daily transmissions. DL0AO 
however will likely get a decode today, if all works well. After the 
decode from DL0AO i'd like to stop the test because my new stacked coil 
is already completed, at least it allows a transmission on 8270 Hz. My 
larger 3 layer coil allows 700 mA antenna current, the new one allows 
just 300 mA, i.e. -7.4 dB. Anyway i'd like to test that new coil for the 
first time. I intend to run DFCW-60000 near 8270.005 Hz. This will allow 
to see a trace in a 47 uHz spectrogram, for Mike and Luis and DL0AO and 
maybe even a few more stations. Each 'dit' will take 16 hours.
I'll start in the end of the week but for the newcomers it would make 
sense to start a RX spectrogram a few days earlier.
An announcement of the carrier transmission will follow during the week...

73, Stefan

PS: Markus, if you can decode the message, you can tell it, it's no secret.

Am 09.09.2017 20:27, schrieb DK7FC:
> VLF,
>
> Another EbNaut message which is even more challenging to decode:
>
> *f = 4470.005000 Hz
> Start time: 10.September.2017  05:00:00 UTC (daily repetition)
> Symbol period: 20 s
> Characters: 15
> CRC bits: 14
> Coding 16K21A
> Duration: 11h01min20sec
> Antenna current: 155 mA*
>
> Markus, if you decode it (after stacking 2...3 days), pse don't tell 
> the message here (but your decode details pse). It will be interesting 
> to see if Paul can get it too. Paul, will you try? Or are you still 
> testing the E field antenna?
>
> 73, Stefan

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I'd like to shorten that transmission experiment a bit. For a decode
from Paul or Jacek it may take 2 weeks of daily transmissions. DL0AO
however will likely get a decode today, if all works well. After the
decode from DL0AO i'd like to stop the test because my new stacked coil
is already completed, at least it allows a transmission on 8270 Hz. My
larger 3 layer coil allows 700 mA antenna current, the new one allows
just 300 mA, i.e. -7.4 dB. Anyway i'd like to test that new coil for
the first time. I intend to run DFCW-60000 near 8270.005 Hz. This will
allow to see a trace in a 47 uHz spectrogram, for Mike and Luis and
DL0AO and maybe even a few more stations. Each 'dit' will take 16 hours.<br>
I'll start in the end of the week but for the newcomers it would make
sense to start a RX spectrogram a few days earlier.<br>
An announcement of the carrier transmission will follow during the
week...<br>
<br>
73, Stefan<br>
<br>
PS: Markus, if you can decode the message, you can tell it, it's no
secret.<br>
<br>
Am 09.09.2017 20:27, schrieb DK7FC:
<blockquote cite="mid:59B432AA.5060007@posteo.de" type="cite">
  <meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
VLF,<br>
  <br>
Another EbNaut message which is even more challenging to decode:<br>
  <br>
  <b>f = 4470.005000 Hz<br>
Start time: 10.September.2017  05:00:00 UTC (daily repetition)<br>
Symbol period: 20 s<br>
Characters: 15<br>
CRC bits: 14<br>
Coding 16K21A<br>
Duration: 11h01min20sec<br>
Antenna current: 155 mA</b><br>
  <br>
Markus, if you decode it (after stacking 2...3 days), pse don't tell
the message here (but your decode details pse). It will be interesting
to see if Paul can get it too. Paul, will you try? Or are you still
testing the E field antenna?<br>
  <br>
73, Stefan<br>
</blockquote>
</body>
</html>

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