Message-ID: <59CACE35.2010302@posteo.de>
Date: Wed, 27 Sep 2017 00:01:25 +0200
From: DK7FC <selberdenken@posteo.de>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
MIME-Version: 1.0
To: rsgb_lf_group@blacksheep.org
References: <15ea03edd54-c07-2a33b@webjas-vab251.srv.aolmail.net> <59C2C034.3070609@posteo.de> <Pine.LNX.4.64.1709201833460.30885@plato.ucs.mun.ca> <59C428C3.7030709@posteo.de> <59C9816E.4050409@posteo.de> <alpine.DEB.2.11.1709261311590.734@mailn.lipkowski.org> <6e7bcad1-06db-f5e4-f5fc-a5bc7cb4be45@abelian.org>
In-Reply-To: <6e7bcad1-06db-f5e4-f5fc-a5bc7cb4be45@abelian.org>
Subject: Re: VLF: 300 mA on 8270 Hz
Content-Type: multipart/alternative;
 boundary="------------090308020905090707060202"
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org

This is a multi-part message in MIME format.
--------------090308020905090707060202
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit

Hi Paul,

I already expected that you were in holidays.

Am 26.09.2017 13:56, schrieb Paul Nicholson:
>
> So now there are all these messages to decode... Ah yes I am
> needed - but only to read the emails and run the decoder.
Of course you are needed. There are a lot of things to do this winter 
season! :-)

> So the following is just
> using the loops:
>
>  2017-09-22: +0.4 dB phase 126.0 list rank 8225;
>  2017-09-23: +1.6 dB phase 131.0 list rank 0;
>  2017-09-24: +0.3 dB phase 134.0 list rank 242;
>  2017-09-25: +2.2 dB phase 127.2 list rank 0;
>
> All decoded an obviously correct message with uniform reference
> phase, using the optimum list length for uniform phase;

> Stacking all four gives Eb/N0 = +7.2 dB.
  Great results. Especially the phase is interesting! Quite ow variations.

There are a few days remaining within the 100 transmit hours test. I had 
the idea to try to send a 100 character message over to you, on each 
band, with as much stacking as necessary. 8.27 kHz will be easy. 6.47 
kHz will be well possible too. Then 5.17 kHz will be a challenge. And 
4470 Hz will be a hard challenge! Let's see what we do.
Now, let's try:

*f = 8270.005000 Hz
Start time: 27.September.2017  06:00:00 UTC (daily)
Symbol period: 8 s
Characters: 100
CRC bits: 16
Coding 8K19A
Duration: 11h,16min,16sec
Antenna current: 300 mA

*Paul, tell the message if you got it. I hope that 4 days will be 
enough. After that test, i'll go down to 6.47 kHz.

73, Stefan
*

*

--------------090308020905090707060202
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 8bit

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Hi Paul, <br>
<br>
I already expected that you were in holidays.<br>
<br>
Am 26.09.2017 13:56, schrieb Paul Nicholson:
<blockquote cite="mid:6e7bcad1-06db-f5e4-f5fc-a5bc7cb4be45@abelian.org"
 type="cite"><br>
So now there are all these messages to decode... Ah yes I am
  <br>
needed - but only to read the emails and run the decoder.
  <br>
</blockquote>
Of course you are needed. There are a lot of things to do this winter
season! :-)<br>
<br>
<blockquote cite="mid:6e7bcad1-06db-f5e4-f5fc-a5bc7cb4be45@abelian.org"
 type="cite"> So the following is just
  <br>
using the loops:
  <br>
  <br>
 2017-09-22: +0.4 dB phase 126.0 list rank 8225;
  <br>
 2017-09-23: +1.6 dB phase 131.0 list rank 0;
  <br>
 2017-09-24: +0.3 dB phase 134.0 list rank 242;
  <br>
 2017-09-25: +2.2 dB phase 127.2 list rank 0;
  <br>
  <br>
All decoded an obviously correct message with uniform reference
  <br>
phase, using the optimum list length for uniform phase;
  <br>
</blockquote>
<br>
<blockquote cite="mid:6e7bcad1-06db-f5e4-f5fc-a5bc7cb4be45@abelian.org"
 type="cite">Stacking all four gives Eb/N0 = +7.2 dB.
  <br>
</blockquote>
 Great results. Especially the phase is interesting! Quite ow
variations.<br>
<br>
There are a few days remaining within the 100 transmit hours test. I
had the idea to try to send a 100 character message over to you, on
each band, with as much stacking as necessary. 8.27 kHz will be easy.
6.47 kHz will be well possible too. Then 5.17 kHz will be a challenge.
And 4470 Hz will be a hard challenge! Let's see what we do.<br>
Now, let's try:<br>
<br>
<b>f = 8270.005000 Hz<br>
Start time: 27.September.2017  06:00:00 UTC (daily)<br>
Symbol period: 8 s<br>
Characters: 100<br>
CRC bits: 16<br>
Coding 8K19A<br>
Duration: 11h,16min,16sec<br>
Antenna current: 300 mA<br>
<br>
</b>Paul, tell the message if you got it. I hope that 4 days will be
enough. After that test, i'll go down to 6.47 kHz.<br>
<br>
73, Stefan<br>
<b><br>
<br>
</b>
</body>
</html>

--------------090308020905090707060202--