Return-Path: X-Spam-DCC: paranoid 1181; Body=3 Fuz1=3 Fuz2=3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO 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 t8PEjf2M029217 for ; Fri, 25 Sep 2015 16:45:41 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZfUD9-00053P-Sa for rs_out_1@blacksheep.org; Fri, 25 Sep 2015 15:42:55 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZfUD9-00053G-KL for rsgb_lf_group@blacksheep.org; Fri, 25 Sep 2015 15:42:55 +0100 Received: from smtp-auth2-114.primus.ca ([209.183.31.114] helo=tor-smtp-05.primus.ca) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1ZfUC9-0007yJ-SC for rsgb_lf_group@blacksheep.org; Fri, 25 Sep 2015 15:42:54 +0100 Received: from [98.124.27.142] (helo=Bigmachine.magma.ca) by tor-smtp-05.primus.ca with esmtpa (Exim 4.84) (envelope-from ) id 1ZfUBo-0004L0-WE for rsgb_lf_group@blacksheep.org; Fri, 25 Sep 2015 10:41:33 -0400 X-Mailer: QUALCOMM Windows Eudora Version 7.1.0.9 Date: Fri, 25 Sep 2015 10:41:35 -0400 To: rsgb_lf_group@blacksheep.org From: Bill de Carle In-Reply-To: <56053E47.30707@charter.net> References: <5601EC9F.2010607@gmail.com> <56053E47.30707@charter.net> Mime-Version: 1.0 X-Authenticated: ve2iq - (Bigmachine.magma.ca) [98.124.27.142] X-HELO-Warning: Remote host 209.183.31.114 (smtp-auth2-114.primus.ca) used invalid HELO/EHLO tor-smtp-05.primus.ca - verification failed X-Scan-Signature: e09cca6d8e44a91eadbdfb3e1b8aec09 Message-Id: Subject: Re: LF: Coherent BPSK on LF using EbNaut Content-Type: text/plain; charset="us-ascii"; format=flowed 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: 4147 At 08:29 AM 9/25/2015, John, W1TAG wrote: >Somewhere around February, 2004, Bill de Carle, VE2IQ, came out with >a version of AFRICAM that implemented GPS-synched BPSK. A number of >us played with it in the 160-190 kHz U.S. "Lowfer" band. The GPS >sync greatly reduced the lock-in time at the decoder end, and was >quite effective. When the first of the U.S. experimental stations >arrived on 2200 meters later that year, we tried it down there, >again with good results among a small group of listeners. Given the >small target audience, we all moved on other things. > >Anyway, just to note for historical purposes that some of this has >been done before! > >John, W1TAG I remember the night I first decoded CT1DRP's callsign on LF using GPS-sync'd DFCW (60 seconds per bit). Here's the first page of the run: http://www.magma.ca/~ve2iq/ct1drp.pdf I believe the date was somewhere around April of 2003? Ah, the nostalgia! Thanks for the plug John. Bill VE2IQ