Message-ID: <5A8AE86A.50409@posteo.de>
Date: Mon, 19 Feb 2018 16:08:26 +0100
From: DK7FC <selberdenken@posteo.de>
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References: <1UQO4ZtP1S.4LaOD46xURL@optiplex980-pc> <5A8AE616.2030906@posteo.de>
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Subject: Re: VLF: DK7FC > W1VD 8.27 kHz EbN0 success!
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PS: 6099 km, my new ODX and > twice as far as the last ODX!!

Am 19.02.2018 15:58, schrieb DK7FC:
> Hi Jay, VLF,
>
> An excellent achievement below 9 kHz! And even from a single night, 
> without stacking!!! I expected we will need about a week, or even more.
>
> To leave a carrier trace or even a message decode over that path, from 
> east to west, was one of the goals during the kite experiments in 
> 2010/2011, where my ERP was 20 dB higher. We mever managed that. Until 
> now!
>
> So maybe the E>W path is less than 20 dB harder. That opens the door 
> for more imaginations about VLF DX, not only for me.
>
> We need to proove that this is reproducable :-) So let me try a 2 
> character message starting this night:
>
> *f = 8270.1000 Hz
> Start time: 19.FEB.2018  22:3:00 UTC (daily)
> Symbol period: 30 s
> Characters: 2
> CRC bits: 22
> Coding 16K21A
> Duration: 07:12 [hh:mm]
> Antenna current: 700 mA*
>
> In the attachment one can see the results put out by the Linux decoder 
> running on the file you sent me this morning. Only right decodes and 
> improving rank.
>
> Can we really expect 2 characters in 2 days? We will see! Let's go!
>
> 73, Stefan
>
>
>
>
> Am 19.02.2018 15:41, schrieb jrusgrove@comcast.net:
>> Stefan's transmission:
>> *f = 8270.1000 Hz
>> Start time: 12.FEB.2018  22:32:00 UTC (daily)
>> Symbol period: 32 s
>> Characters: 1
>> CRC bits: 24
>> Coding 16K21A
>> Duration: 07:06:40 [hh:mm:ss]
>> Antenna current: 700 mA*
>> After a week of trying ... including two nights with TX problems, one 
>> night with RX problems and one night with high noise levels ... a 
>> successful decode of Stefan's message was made on last night's 
>> transmission. s/n in 39 uHz 10.5 dB and Eb/N0 2.54 dB. It was pretty 
>> convincing as the decode popped up in the 0,0,0,0 phase trial and 
>> only improved thereafter.
>> Congrats Stefan on what appears to be the first E>W T/A on Dreamers Band!
>> Jay W1VD

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PS: 6099 km, my new ODX and &gt; twice as far as the last ODX!! <br>
<br>
Am 19.02.2018 15:58, schrieb DK7FC:
<blockquote cite="mid:5A8AE616.2030906@posteo.de" type="cite">
  <meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
Hi Jay, VLF, <br>
  <br>
An excellent achievement below 9 kHz! And even from a single night,
without stacking!!! I expected we will need about a week, or even more.<br>
  <br>
To leave a carrier trace or even a message decode over that path, from
east to west, was one of the goals during the kite experiments in
2010/2011, where my ERP was 20 dB higher. We mever managed that. Until
now!<br>
  <br>
So maybe the E&gt;W path is less than 20 dB harder. That opens the door
for more imaginations about VLF DX, not only for me.<br>
  <br>
We need to proove that this is reproducable :-) So let me try a 2
character message starting this night:<br>
  <br>
  <strong>f = 8270.1000 Hz<br abp="2715">
Start time: 19.FEB.2018  22:3:00 UTC (daily)<br abp="2716">
Symbol period: 30 s<br abp="2717">
Characters: 2<br abp="2718">
CRC bits: 22<br abp="2719">
Coding 16K21A<br abp="2720">
Duration: 07:12 [hh:mm]<br abp="2721">
Antenna current: 700 mA</strong><br>
  <br>
In the attachment one can see the results put out by the Linux decoder
running on the file you sent me this morning. Only right decodes and
improving rank.<br>
  <br>
Can we really expect 2 characters in 2 days? We will see! Let's go!<br>
  <br>
73, Stefan<br>
  <br>
  <br>
  <br>
  <br>
Am 19.02.2018 15:41, schrieb <a moz-do-not-send="true"
 class="moz-txt-link-abbreviated" href="mailto:jrusgrove@comcast.net:">jrusgrove@comcast.net:</a>
  <blockquote cite="mid:1UQO4ZtP1S.4LaOD46xURL@optiplex980-pc"
 type="cite">
    <style type="text/css"> body { margin:0.7em; } body.OECFntDef, body.OECFntDef div { font-family:Arial,"Segoe UI",Tahoma,Verdana,Helvetica,sans-serif;font-size:10pt; }</style>
    <meta name="GENERATOR" content="MSHTML 11.00.9600.18450">
    <div>Stefan's transmission:</div>
    <div> </div>
    <div><strong>f = 8270.1000 Hz<br abp="2715">
Start time: 12.FEB.2018  22:32:00 UTC (daily)<br abp="2716">
Symbol period: 32 s<br abp="2717">
Characters: 1<br abp="2718">
CRC bits: 24<br abp="2719">
Coding 16K21A<br abp="2720">
Duration: 07:06:40 [hh:mm:ss]<br abp="2721">
Antenna current: 700 mA</strong><br abp="2722">
    </div>
    <div>After a week of trying ... including two nights with TX
problems, one night with RX problems and one night with high noise
levels ... a successful decode of Stefan's message was made on last
night's transmission. s/n in 39 uHz 10.5 dB and Eb/N0 2.54 dB. It was
pretty convincing as the decode popped up in the 0,0,0,0 phase trial
and only improved thereafter.</div>
    <div> </div>
    <div>Congrats Stefan on what appears to be the first E&gt;W T/A on
Dreamers Band!</div>
    <div> </div>
    <div>Jay W1VD </div>
    <div> </div>
    <div> </div>
    <div>    </div>
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