Return-Path: X-Spam-DCC: paranoid 1233; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.0 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_MESSAGE,HTML_TINY_FONT autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u04KmtLN004773 for ; Mon, 4 Jan 2016 21:48:55 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1aGC09-0008LG-5S for rs_out_1@blacksheep.org; Mon, 04 Jan 2016 20:45:13 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1aGC08-0008L7-Ne for rsgb_lf_group@blacksheep.org; Mon, 04 Jan 2016 20:45:12 +0000 Received: from mail-wm0-f53.google.com ([74.125.82.53]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.86) (envelope-from ) id 1aGBz1-0007PU-M9 for rsgb_lf_group@blacksheep.org; Mon, 04 Jan 2016 20:45:11 +0000 Received: by mail-wm0-f53.google.com with SMTP id f206so100530wmf.0 for ; Mon, 04 Jan 2016 12:43:49 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=pK6/FLmdcii9UBSOipn4ij4DvXGxdN1vTv5Klwa4CJI=; b=HK4QgELK4RFv5nUXWHH0Nj34yV8kH/z+n7dsUG7NR0UgmLBFrUlLNCmr2LymxcUz0c EZiwuw2DGonQcdEVZ5t2cnBm9Xex+b4RuiYRZoC0EwchdSjn3f4OtqfWYwBaYVv+gcPg 6TGXFBiotbLdNP+Uxuc7Tv0XoXvsSAMpbsnXSieZWHj04O4NSFUgNT61pLGLU6umI+Se L+NjVOngeoDBmh/jxT65jGGxn5N8B5Gwh03V7K6ciblS4/6RU8jSzddw5UkWSx7gLK/+ FoXl/5RNo42lo4UamSIactmZU3uPCDgJCTj9tG4PI6nWtk6rBeZOF9cqq4yAE8106cpo 8PnA== MIME-Version: 1.0 X-Received: by 10.194.103.164 with SMTP id fx4mr79056492wjb.56.1451940228393; Mon, 04 Jan 2016 12:43:48 -0800 (PST) Received: by 10.28.150.6 with HTTP; Mon, 4 Jan 2016 12:43:48 -0800 (PST) In-Reply-To: <1520e3fe298-6ae8-1a624@webprd-m78.mail.aol.com> References: <1520e3fe298-6ae8-1a624@webprd-m78.mail.aol.com> Date: Mon, 4 Jan 2016 20:43:48 +0000 Message-ID: From: Andy Talbot To: rsgb_lf_group@yahoogroups.co.uk Cc: rsgb_lf_group@blacksheep.org X-Scan-Signature: 903ce439c63f3d003fd332ac7920b8c3 Subject: Re: [rsgb_lf_group] Re: LF: DL-SWL Content-Type: multipart/alternative; boundary=047d7bf198e48c757f0528882df4 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 6116 --047d7bf198e48c757f0528882df4 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Just rereading the IEE Paper on amateur LF operation, written back in 2002 to try to recall the history. http://www.g4jnt.com/IEEPaper.pdf Yep, CWish strictly speaking SLOWCW (as it was called then) or QRSS (as it started to be called later) with mega ERP Andy On 4 January 2016 at 20:06, David G0MRF g0mrf@aol.com [rsgb_lf_group] < rsgb_lf_group@yahoogroups.co.uk> wrote: > > > Hi Andy. > Just like Marconi (?) the first TA contacts between 9/2000 and Jan 2001 o= n > 137 were plain CW. > > 73 > > David > > > -----Original Message----- > From: Andy Talbot andy.g4jnt@gmail.com [rsgb_lf_group] < > rsgb_lf_group@yahoogroups.co.uk> > To: rsgb_lf_group ; rsgb_lf_group < > rsgb_lf_group@yahoogroups.co.uk> > Sent: Mon, 4 Jan 2016 19:38 > Subject: [rsgb_lf_group] Re: LF: DL-SWL > > > 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 o= n, > 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 fo= r > 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 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 recent= ly >> as last month, his 137.780 kHz grabber showed my signal on nights that i= t >> was invisible on the UK and other DL grabbers. >> >> __._,_.___ > ------------------------------ > Posted by: David G0MRF > ------------------------------ > Reply via web post > > =E2=80=A2 Reply to sender > > =E2=80=A2 Reply to group > > =E2=80=A2 Start a new topic > > =E2=80=A2 Messages in this topic > > (3) > Visit Your Group > > > - New Members > > 1 > - New Photos > > 3 > > [image: Yahoo! Groups] > > =E2=80=A2 Privacy =E2=80=A2 > Unsubscribe > =E2= =80=A2 Terms > of Use > > . > > __,_._,___ > --047d7bf198e48c757f0528882df4 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Just rereading the IEE Paper on amateur LF operation, writ= ten back in 2002 to try to recall the history.
<= br>
Yep, CWish
strictly speaking SLOWCW (as it was call= ed then) or QRSS (as it started to be called later) =C2=A0with mega ERP

Andy

On 4 January 2016 at 20:06, David G0MRF g0mrf@aol.com [rsgb_lf_group] <rsgb_lf_gr= oup@yahoogroups.co.uk> wrote:
=20
=C2=A0
=20 =20

Hi Andy.
Just like Marconi (?) the first TA contacts between 9/2000 and Jan 200= 1 on 137 were plain CW.
=C2=A0
73
=C2=A0
David
=C2=A0
=C2=A0
-----= Original Message-----
From: Andy Talbot andy.g4jnt@gmail.com [rsgb_lf_group] <rsgb_lf_group@yahoogroups.co.uk= >
To: rsgb_lf_group <rsgb_lf_group@blacksheep.org>; rsgb_lf_group <rsgb_lf_grou= p@yahoogroups.co.uk>
Sent: Mon, 4 Jan 2016 19:38
Subject: [rsgb_lf_group] Re: LF: DL-SWL

=C2=A0
=20
=20
=20 =20 =20
Indeed -=C2=A0
What happened to WOLF =C2=A0(*) ?

I've just tried Googling (**) it and find practically no hits.=C2= =A0 The data mode seems to have been used successfully =C2=A0in the years a= round 2001 and on, for a bit, but has faded. =C2=A0 The URL I had for it is= now gives the magic 404.=C2=A0 Didn't the first transatlantic contact = on 137kHz use this mode?

I guess that as it used 10 baud =C2=A0BPSK, =C2=A0was considered too c= omplicated for the average LF Op. to generate. =C2=A0 No one seems to use u= pconversion from audio, and few seem to be able to make simple PSK encoders= . =C2=A0 Even for EBnaut, relays =C2=A0are suggested as the means to revers= e the phase (yes, truely !!). =C2=A0 =C2=A0I suppose, to be fair, 10 baud u= nfiltered BPSK from a high power transmitter is a bit unkind to other band = users.

Andy =C2=A0G4JNT

(*) 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> wrote:
For those who may be newe= r to this part of our hobby, Hartmut Wolff is somewhat of a legend in recei= ving TA signals in the 137 kHz band. Night after night while others could o= nly see Loran lines and the debris from DCF39, Hartmut produced screenshots= of some pretty weak North American signals. He also gave reports on the sa= dly-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 gra= bbers.

=20 =20 =20
=20

=20 =20
__._,_.___
=20 =20 =20 =20
Posted by: David G0MRF <g0mrf@aol.com>
Reply via w= eb post =E2=80=A2 Reply to sender =E2=80=A2 Reply to group =E2=80=A2 Start= a new topic =E2=80=A2 Messages in this topic (3)
=20 =20
Visit Your Group
3D"Yahoo!
=E2=80=A2 Privacy =E2=80=A2 Unsubscribe =E2=80=A2 Terms of Use

=20 =20 =20 =20
=20
.
=
= =20
__,_._,___
=20

--047d7bf198e48c757f0528882df4--