Delivered-To: daveyxm@virginmedia.com Received: by 10.50.237.98 with SMTP id vb2csp245844igc; Wed, 5 Mar 2014 15:10:20 -0800 (PST) X-Received: by 10.194.110.41 with SMTP id hx9mr5113897wjb.28.1394061019891; Wed, 05 Mar 2014 15:10:19 -0800 (PST) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id h7si2446301wja.53.2014.03.05.15.10.19 for ; Wed, 05 Mar 2014 15:10:19 -0800 (PST) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1WLKby-0005Fy-7t for rs_out_1@blacksheep.org; Wed, 05 Mar 2014 22:48:26 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1WLKbx-0005Fp-O6 for rsgb_lf_group@blacksheep.org; Wed, 05 Mar 2014 22:48:25 +0000 Received: from mailfe05.swip.net ([212.247.154.129] helo=swip.net) by relay1.thorcom.net with esmtps (SSLv3:DES-CBC3-SHA:168) (Exim 4.82) (envelope-from ) id 1WLKbv-0008Sw-QW for rsgb_lf_group@blacksheep.org; Wed, 05 Mar 2014 22:48:24 +0000 X-T2-Spam-Status: No, hits=0.0 required=5.0 Received: from [81.224.101.42] (account cxu-dcw-tyr@tele2.se HELO [192.168.1.2]) by mailfe05.swip.net (CommuniGate Pro SMTP 5.4.4) with ESMTPSA id 477783144 for rsgb_lf_group@blacksheep.org; Wed, 05 Mar 2014 23:48:21 +0100 Message-ID: <5317A9C5.2050303@tele2.se> Date: Wed, 05 Mar 2014 23:48:37 +0100 From: Johan Bodin User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <5316EA0B.4020001@abelian.org> <004001cf3870$27cb9620$6401a8c0@JAYDELL> <53173FCD.9010808@abelian.org> In-Reply-To: X-Enigmail-Version: 1.6 X-HELO-Warning: Remote host 212.247.154.129 (mailfe05.swip.net) used invalid HELO/EHLO swip.net - verification failed X-Spam-Score: -0.0 (/) 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: Yes, an impressive achievement indeed, congratulations to all involved! Wow is the word! The 24dB S/N ratio on Dex' signal exceeded all my expectations! 24 dB S/N is "armchair copy". It would be interesting to actually listen to a spectrally shifted and time compressed version of the signal. Can you do that on your Linux box Paul? Not for scientific purposes but for pure sheer joy :-) [...] Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [212.247.154.129 listed in list.dnswl.org] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record X-Scan-Signature: ac0f6ff1af52b6036ac1f4fe0c2bd52c Subject: Re: LF: Re: VLF 29501, signal? Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=MAILTO_TO_SPAM_ADDR 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 Yes, an impressive achievement indeed, congratulations to all involved! Wow is the word! The 24dB S/N ratio on Dex' signal exceeded all my expectations! 24 dB S/N is "armchair copy". It would be interesting to actually listen to a spectrally shifted and time compressed version of the signal. Can you do that on your Linux box Paul? Not for scientific purposes but for pure sheer joy :-) Given 24dB S/N headroom at 29.5kHz, sub 9 kHz TA is probably not too far away! The TX antenna would be no more than ~10dB down compared to 30k. 73 Johan SM6LKM Markus Vester wrote: > Paul, Dex, Bob, > > wow, I am very much impressed by this work! > > So it seems there's three to share the honour of the first amateur VLF > atlantic crossing. Funny that history seems to repeat itself - remember > the unusual outcome of the strive towards the Peter Bobek award? > > Now I'm curious who'll achieve the first detection below 9 kHz! > > Best 73, > Markus (DF6NM) > > > > *From:* Paul Nicholson > *Sent:* Wednesday, March 05, 2014 4:16 PM > *To:* rsgb_lf_group@blacksheep.org > *Subject:* Re: LF: Re: VLF 29501, signal? > > An exchange of PMs confirms that Dex was transmitting > at that time on 29501 Hz. > > Comparison of average signal level in 55uHz bandwidth > from 02:00 to 07:00 UT > > http://abelian.org/vlf/tmp/140305a.png > > Bob: 24dB S/N > > Dex: 14dB S/N > > WH2XBA/4 line not so sharp, just noise or is that a bit > of a wobble of the carrier phase? > > -- > Paul Nicholson > -- >