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 u417kAjJ009460 for ; Sun, 1 May 2016 09:46:10 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1awm0D-00089P-7C for rs_out_1@blacksheep.org; Sun, 01 May 2016 08:41:17 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1awm0C-00089G-PH for rsgb_lf_group@blacksheep.org; Sun, 01 May 2016 08:41:16 +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 1awm0B-0004SF-6k for rsgb_lf_group@blacksheep.org; Sun, 01 May 2016 08:41:15 +0100 Received: from dovecot03.posteo.de (dovecot03.posteo.de [172.16.0.13]) by mout01.posteo.de (Postfix) with ESMTPS id 5640320B35 for ; Sun, 1 May 2016 09:41:06 +0200 (CEST) Received: from mail.posteo.de (localhost [127.0.0.1]) by dovecot03.posteo.de (Postfix) with ESMTPSA id 3qyK9t1FzMz5vMp for ; Sun, 1 May 2016 09:41:06 +0200 (CEST) Message-ID: <5725B311.6060309@posteo.de> Date: Sun, 01 May 2016 09:41:05 +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: <15468d74550-4d67-759d@webprd-m78.mail.aol.com> <57254998.1020401@posteo.de> <57259952.2020708@abelian.org> In-Reply-To: <57259952.2020708@abelian.org> X-Scan-Signature: fc152e7304849b9a177649b85aea9f41 Subject: Re: VLF: EbNaut transmission on 8270.1 Hz again and again 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: 7956 Hi Paul, VLF, Fine, a nice result! There's not so much margin left. What would hve been the shortest symbol length to get a decode on your side? And can you tell something about the signal stability? 25 dB in 10 uHz looks ufb. I'm using that E field pick up probe to feed back the radiated signal to the soundcard, so the whole system (soundcard, PA, coil, antenna wire) becomes part of the PLL. The probe is a simple unshielded piece of RG174 cable, abt 0.1 m long, in a distance of 1m to the antenna wire. so far i have no idea if this improves the phase stability or maybe even reduce it? I saw no announcements for a transmission by DF6NM, DL3NDR or DJ8WX (why are only German stations transmitting on VLF these days?) this morning and it is sunday, so i started a simple carrier transmission at 07.05 UTC at 8270.00500 Hz. The low QRN period must be used :-) And, Gary/G4WGT has started a 47 uHz SL instance on his VLF grabber. Maybe i can leave a small trace there this morning. 73, Stefan Am 01.05.2016 07:51, schrieb Paul Nicholson: > > After the full message duration had elapsed, > Eb/N0 came to +1.6 dB, > > Phase: 180 180 150 150 > > Carrier S/N: 24.96 dB in 10.3 uH > > Were the last 3 hours corrupted? Without signal, > the decoder pads with zeros and these all count > as errors for Eb/N0 calculation. If signal > is present but wrong, only 50% of the missing bits > will be errors. > > -- > Paul Nicholson > -- >