Message-ID: <505082C4.9040702@iup.uni-heidelberg.de>
Date: Wed, 12 Sep 2012 14:40:36 +0200
From: =?ISO-8859-15?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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To: rsgb_lf_group@blacksheep.org,
        Edgar J Twining <edgarjtwining@virginbroadband.com.au>
Subject: LF: Fwd: Re: Ideas for a slower WSPR for the 137 khz band
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Message from Joe/K1JT.

BTW i don't know if it is OK for Joe that his email is forwarded to=20
everyone in the web! But i think it would be OK for him to forward it to=20
a limited number of active radio amateurs operating in the 137 kHz band.=20
So if you make this email public in the web, it is your decision!

73, Stefan/DK7FC

-------- Original-Nachricht --------
Betreff: 	Re: Ideas for a slower WSPR for the 137 khz band
Datum: 	Wed, 12 Sep 2012 08:28:47 -0400
Von: 	Joe Taylor <joe@Princeton.EDU>
An: 	Stefan Sch=E4fer <Stefan.Schaefer@iup.uni-heidelberg.de>



Hi Stefan,

Thanks for your interesting message.

A super-slow version of WSPR (or something like WSPR) should be
possible, and I might be able to devote some time to writing the
necessary code.  You should know that I will not be able to get to it
for several months, however.  Perhaps near the end of this year.

One question for you: It seems to me that propagation at 137 kHz (and
possibly also 475 kHz) is generally stable enough to make very slow BPSK
a better modulation scheme than the 4-FSK used in today's WSPR.  Do you
agree?

	-- 73, Joe, K1JT


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Message from Joe/K1JT.<br>
<br>
BTW i don't know if it is OK for Joe that his email is forwarded to
everyone in the web! But i think it would be OK for him to forward it
to a limited number of active radio amateurs operating in the 137 kHz
band. So if you make this email public in the web, it is your decision!<b=
r>
<br>
73, Stefan/DK7FC<br>
<br>
-------- Original-Nachricht --------
<table class=3D"moz-email-headers-table" border=3D"0" cellpadding=3D"0"
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  <tbody>
    <tr>
      <th align=3D"RIGHT" nowrap=3D"nowrap" valign=3D"BASELINE">Betreff: =
</th>
      <td>Re: Ideas for a slower WSPR for the 137 khz band</td>
    </tr>
    <tr>
      <th align=3D"RIGHT" nowrap=3D"nowrap" valign=3D"BASELINE">Datum: </=
th>
      <td>Wed, 12 Sep 2012 08:28:47 -0400</td>
    </tr>
    <tr>
      <th align=3D"RIGHT" nowrap=3D"nowrap" valign=3D"BASELINE">Von: </th=
>
      <td>Joe Taylor <a class=3D"moz-txt-link-rfc2396E" href=3D"mailto:jo=
e@Princeton.EDU">&lt;joe@Princeton.EDU&gt;</a></td>
    </tr>
    <tr>
      <th align=3D"RIGHT" nowrap=3D"nowrap" valign=3D"BASELINE">An: </th>
      <td>Stefan Sch=E4fer <a class=3D"moz-txt-link-rfc2396E" href=3D"mai=
lto:Stefan.Schaefer@iup.uni-heidelberg.de">&lt;Stefan.Schaefer@iup.uni-he=
idelberg.de&gt;</a></td>
    </tr>
  </tbody>
</table>
<br>
<br>
<pre>Hi Stefan,

Thanks for your interesting message.

A super-slow version of WSPR (or something like WSPR) should be=20
possible, and I might be able to devote some time to writing the=20
necessary code.  You should know that I will not be able to get to it=20
for several months, however.  Perhaps near the end of this year.

One question for you: It seems to me that propagation at 137 kHz (and=20
possibly also 475 kHz) is generally stable enough to make very slow BPSK=20
a better modulation scheme than the 4-FSK used in today's WSPR.  Do you=20
agree?

	-- 73, Joe, K1JT
</pre>
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