Return-Path: X-Spam-DCC: paranoid 1290; 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=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, RATWARE_GECKO_BUILD,SPF_PASS 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 u55I3PmG030146 for ; Sun, 5 Jun 2016 20:03:25 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1b9cGn-0005Lt-21 for rs_out_1@blacksheep.org; Sun, 05 Jun 2016 18:55:29 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1b9cGm-0005Lk-Ld for rsgb_lf_group@blacksheep.org; Sun, 05 Jun 2016 18:55:28 +0100 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1b9cGk-0004dZ-Kl for rsgb_lf_group@blacksheep.org; Sun, 05 Jun 2016 18:55:27 +0100 Received: from dovecot03.posteo.de (dovecot03.posteo.de [172.16.0.13]) by mout01.posteo.de (Postfix) with ESMTPS id 545532097E for ; Sun, 5 Jun 2016 19:55:24 +0200 (CEST) Received: from mail.posteo.de (localhost [127.0.0.1]) by dovecot03.posteo.de (Postfix) with ESMTPSA id 3rN58X1Zzqz5vMr for ; Sun, 5 Jun 2016 19:55:24 +0200 (CEST) Message-ID: <5754678B.9090001@posteo.de> Date: Sun, 05 Jun 2016 19:55:23 +0200 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <154c32c4dba-373a-24653@webprd-m58.mail.aol.com> <573CAF79.9040701@abelian.org> <573CBBF0.4030701@posteo.de> <573E5907.6020107@posteo.de> <573EA094.3040205@abelian.org> <573EF90F.1080201@posteo.de> <573FC4DA.3080107@abelian.org> <5740842D.3030000@posteo.de> <5744FA27.6010703@posteo.de> <574AF1CA.7080702@posteo.de> <57512B49.2080305@abelian.org> <57514ED7.5080904@posteo.de> <5753087A.3030501@abelian.org> In-Reply-To: <5753087A.3030501@abelian.org> X-Scan-Signature: c0336009bd9bab526ca27d297ea7579a Subject: Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit 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 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 8229 Hi Paul, VLF, That's amazing! I like the 4 uHz peak :-) 18.22 dB in such a small bandwidth, that tell's something about TX and RX stability but also about the path stability. No defeat at all. The (unblanked!!) QRN looks incredibly strong but i find it interesting to try in such condx. If you are ready for a next transmission, i would start one in a few hours. Maybe 300s symbols and 13 chars? Takes just 74 hours! :-) 73, Stefan Am 04.06.2016 18:57, schrieb Paul Nicholson: > > Stefan wrote: > > > Message 22.05.2016: 'cqcq dk7fc in jn49ik' > > 18.22 dB in 4.06 uHz, > > http://abelian.org/vlf/tmp/160604a.gif > > which gives Eb/N0 = -2.35 dB on the 20 char message > > > Message 25.05.2016: 'not very easy' > > 16.24 dB in 7.97 uHz, > > http://abelian.org/vlf/tmp/160604b.gif > > and Eb/N0 = -2.46 dB. > > Seems we are close with both messages, just needs another dB > to have a chance of decoding and another 2dB would make > decode very likely. > > These must be amongst the narrowest bandwidth detections anyone > has used. The day/night phase shift doesn't seem to be causing > us any problem. But, I wonder if I could gain another dB by > adjusting for a nominal diurnal. I can use these recordings to > try that. > > -- > Paul Nicholson > -- >