Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dk06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 3544A380000A3; Wed, 12 Sep 2012 09:07:52 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TBme1-0005Ob-Ou for rs_out_1@blacksheep.org; Wed, 12 Sep 2012 14:06:17 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TBme1-0005OS-7Q for rsgb_lf_group@blacksheep.org; Wed, 12 Sep 2012 14:06:17 +0100 Received: from rhcavuit01.kulnet.kuleuven.be ([134.58.240.129] helo=cavuit01.kulnet.kuleuven.be) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1TBmdz-0008Gd-10 for rsgb_lf_group@blacksheep.org; Wed, 12 Sep 2012 14:06:16 +0100 X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be X-KULeuven-Scanned: Found to be clean X-KULeuven-ID: CC2B41380DC.A3890 X-KULeuven-Information: Katholieke Universiteit Leuven Received: from icts-p-smtps-1.cc.kuleuven.be (icts-p-smtps-1e.kulnet.kuleuven.be [134.58.240.33]) by cavuit01.kulnet.kuleuven.be (Postfix) with ESMTP id CC2B41380DC; Wed, 12 Sep 2012 15:06:08 +0200 (CEST) Received: from ICTS-S-HUB2.luna.kuleuven.be (icts-s-hub2.luna.kuleuven.be [10.112.9.16]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by icts-p-smtps-1.cc.kuleuven.be (Postfix) with ESMTPS id C2D2C4048; Wed, 12 Sep 2012 15:06:08 +0200 (CEST) Received: from ICTS-S-MBX5.luna.kuleuven.be ([fe80::312b:f3bc:9c4:4ebb]) by ICTS-S-HUB2.luna.kuleuven.be ([fe80::8559:ca7c:e195:e15d%26]) with mapi id 14.02.0309.002; Wed, 12 Sep 2012 15:06:08 +0200 X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe To: "rsgb_lf_group@blacksheep.org" , "Edgar J Twining" Thread-Topic: Fwd: Re: Ideas for a slower WSPR for the 137 khz band Thread-Index: AQHNkOSdUsH3mbfd4ESYP/5JA21+CZeGqnDy Date: Wed, 12 Sep 2012 13:06:08 +0000 Message-ID: <7E7DFBB4D102A04DB5ADC88D66628A4A0FB22E7C@ICTS-S-MBX5.luna.kuleuven.be> References: <505082C4.9040702@iup.uni-heidelberg.de> In-Reply-To: <505082C4.9040702@iup.uni-heidelberg.de> Accept-Language: nl-BE, en-US Content-Language: nl-BE X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.112.13.13] MIME-Version: 1.0 X-HELO-Warning: Remote host 134.58.240.129 (rhcavuit01.kulnet.kuleuven.be) used invalid HELO/EHLO cavuit01.kulnet.kuleuven.be - verification failed X-Spam-Score: -1.1 (-) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hello Stefan, BPSK or evn QPSK might be a good choise for daytime 136kHz propagation (surface wave) or 9kHz where paths are indeed stable. But for nighttime 136kHz and certainly 475/500kHz FSK seems the better choise. Certainly on 475/500kHz where the very deep QSB is typical at night. It would surprise me that the extreme propagation changes would not affect the phase of the signal. [...] Content analysis details: (-1.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [134.58.240.129 listed in list.dnswl.org] -0.4 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: bc223f74149f392a7d9f3881f05f1e70 Subject: LF: RE: Fwd: Re: Ideas for a slower WSPR for the 137 khz band Content-Type: multipart/alternative; boundary="_000_7E7DFBB4D102A04DB5ADC88D66628A4A0FB22E7CICTSSMBX5lunaku_" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_30_40,HTML_MESSAGE, HTML_TAG_EXISTS_TBODY autolearn=no version=2.63 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-aol-global-disposition: G x-aol-sid: 3039ac1db40a505089282356 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --_000_7E7DFBB4D102A04DB5ADC88D66628A4A0FB22E7CICTSSMBX5lunaku_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hello Stefan, BPSK or evn QPSK might be a good choise for daytime 136kHz propagation (sur= face wave) or 9kHz where paths are indeed stable. But for nighttime 136kHz and certainly 475/500kHz FSK seems the better cho= ise. Certainly on 475/500kHz where the very deep QSB is typical at night. I= t would surprise me that the extreme propagation changes would not affect t= he phase of the signal. 73, Rik ON7YD - OR7T ________________________________ Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org= ] namens Stefan Sch=E4fer [Stefan.Schaefer@iup.uni-heidelberg.de] Verzonden: woensdag 12 september 2012 14:40 To: rsgb_lf_group@blacksheep.org; Edgar J Twining Onderwerp: LF: Fwd: Re: Ideas for a slower WSPR for the 137 khz band Message from Joe/K1JT. BTW i don't know if it is OK for Joe that his email is forwarded to everyon= e 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 m= ake 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 An: Stefan Sch=E4fer 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 --_000_7E7DFBB4D102A04DB5ADC88D66628A4A0FB22E7CICTSSMBX5lunaku_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hello Stefan,

 

BPSK or = ;evn QPSK might be a good choise for daytime 136kHz=  propagation (surface wave) or 9kHz=  where paths are indeed stable.

But for = ;nighttime 136kHz and certainly 475/500kHz FSK  seems the better choise= . Certainly on 475/500kHz where<= a> the very deep QSB is typical at night. It would s= urprise me that the extreme propagation change= s would not affect the phase of = the signal.

 

73, Rik  ON7YD - OR7T

 

Van: owner-rsgb_lf_group@blacksheep.org [o= wner-rsgb_lf_group@blacksheep.org] namens Stefan Sch=E4fer [Stefan.Schaefer= @iup.uni-heidelberg.de]
Verzonden: woensdag 12 september 2012 14:40
To: rsgb_lf_group@blacksheep.org; Edgar J Twining
Onderwerp: LF: Fwd: Re: Ideas for a slower WSPR for the 137 khz band=

Message from Joe/K1JT.

BTW i don't know if it is OK for Joe that his email is forwarded to everyon= e 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 m= ake 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=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
--_000_7E7DFBB4D102A04DB5ADC88D66628A4A0FB22E7CICTSSMBX5lunaku_--