To: rsgb_lf_group@blacksheep.org
References: <568A4048.4000001@vsas.de> <568A7620.7010506@gmx.de>
 <568AC4A5.4030407@charter.net>
 <CAA8k23TzujmNTV1d9oF7YHXqc3h02vr0Qvmpt6jPAWALWZcSMQ@mail.gmail.com>
From: =?UTF-8?Q?Wolfgang_B=c3=bcscher?= <dl4yhf@freenet.de>
Message-ID: <568AD53E.9080208@freenet.de>
Date: Mon, 4 Jan 2016 21:25:34 +0100
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Subject: Re: WOLF (was: LF: DL-SWL)
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I have pulled Stewart's original article out of a backup copy of WOLF 
(*), and placed it here:

http://www.qsl.net/d/dl4yhf/wolf/wolf_info.html


I met Stewart personally in Friedrichshafen (he got there by train from 
Paris), but have not heard from him for a long time. I still have the 
original sources for the command line driven DOS program. But the coder 
/ encoder / etc, written in C, is also available on the site which John 
already posted here.

Cheers,
   Wolf (**)

(*) the mode

(**) the operator :)

Am 04.01.2016 um 20:38 schrieb Andy Talbot:
> Indeed -
> What happened to WOLF  (*) ?
>
> I've just tried Googling (**) it and find practically no hits.  The 
> data mode seems to have been used successfully  in the years around 
> 2001 and on, for a bit, but has faded.   The URL I had for it is now 
> gives the magic 404.  Didn't the first transatlantic contact on 137kHz 
> use this mode?
>
> I guess that as it used 10 baud  BPSK,  was considered too complicated 
> for the average LF Op. to generate.   No one seems to use upconversion 
> from audio, and few seem to be able to make simple PSK encoders.   
> Even for EBnaut, relays  are suggested as the means to reverse the 
> phase (yes, truely !!).    I suppose, to be fair, 10 baud unfiltered 
> BPSK from a high power transmitter is a bit unkind to other band users.
>
> Andy  G4JNT
>
> (*) Weak signal Operation at LF
> (**) Other search engines are available - so it has been said.
>
>
> On 4 January 2016 at 19:14, John Andrews <w1tag@charter.net 
> <mailto:w1tag@charter.net>> wrote:
>
>     For those who may be newer to this part of our hobby, Hartmut
>     Wolff is somewhat of a legend in receiving TA signals in the 137
>     kHz band. Night after night while others could only see Loran
>     lines and the debris from DCF39, Hartmut produced screenshots of
>     some pretty weak North American signals. He also gave reports on
>     the sadly-orphaned WOLF mode. As recently as last month, his
>     137.780 kHz grabber showed my signal on nights that it was
>     invisible on the UK and other DL grabbers.
>


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    I have pulled Stewart's original article out of a backup copy of
    WOLF (*), and placed it here:<br>
    <br>
    <a class="moz-txt-link-freetext" href="http://www.qsl.net/d/dl4yhf/wolf/wolf_info.html">http://www.qsl.net/d/dl4yhf/wolf/wolf_info.html</a><br>
    <br>
    <br>
    I met Stewart personally in Friedrichshafen (he got there by train
    from Paris), but have not heard from him for a long time. I still
    have the original sources for the command line driven DOS program.
    But the coder / encoder / etc, written in C, is also available on
    the site which John already posted here.<br>
    <br>
    Cheers,<br>
      Wolf (**)<br>
    <br>
    (*) the mode<br>
    <br>
    (**) the operator :)<br>
    <br>
    <div class="moz-cite-prefix">Am 04.01.2016 um 20:38 schrieb Andy
      Talbot:<br>
    </div>
    <blockquote
cite="mid:CAA8k23TzujmNTV1d9oF7YHXqc3h02vr0Qvmpt6jPAWALWZcSMQ@mail.gmail.com"
      type="cite">
      <div dir="ltr">Indeed - 
        <div>What happened to WOLF  (*) ?</div>
        <div><br>
        </div>
        <div>I've just tried Googling (**) it and find practically no
          hits.  The data mode seems to have been used successfully  in
          the years around 2001 and on, for a bit, but has faded.   The
          URL I had for it is now gives the magic 404.  Didn't the first
          transatlantic contact on 137kHz use this mode?</div>
        <div><br>
        </div>
        <div>I guess that as it used 10 baud  BPSK,  was considered too
          complicated for the average LF Op. to generate.   No one seems
          to use upconversion from audio, and few seem to be able to
          make simple PSK encoders.   Even for EBnaut, relays  are
          suggested as the means to reverse the phase (yes, truely !!).
             I suppose, to be fair, 10 baud unfiltered BPSK from a high
          power transmitter is a bit unkind to other band users.</div>
        <div><br>
        </div>
        <div>Andy  G4JNT</div>
        <div><br>
        </div>
        <div>(*) Weak signal Operation at LF</div>
        <div>(**) Other search engines are available - so it has been
          said.</div>
        <div class="gmail_extra"><br>
        </div>
        <div class="gmail_extra"><br>
          <div class="gmail_quote">On 4 January 2016 at 19:14, John
            Andrews <span dir="ltr">&lt;<a moz-do-not-send="true"
                href="mailto:w1tag@charter.net" target="_blank">w1tag@charter.net</a>&gt;</span>
            wrote:<br>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">For
              those who may be newer to this part of our hobby, Hartmut
              Wolff is somewhat of a legend in receiving TA signals in
              the 137 kHz band. Night after night while others could
              only see Loran lines and the debris from DCF39, Hartmut
              produced screenshots of some pretty weak North American
              signals. He also gave reports on the sadly-orphaned WOLF
              mode. As recently as last month, his 137.780 kHz grabber
              showed my signal on nights that it was invisible on the UK
              and other DL grabbers.<br>
              <br>
            </blockquote>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
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