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[195.171.43.25]) by mx.google.com with ESMTP id fs14si4563260wjc.134.2014.03.06.04.51.35 for ; Thu, 06 Mar 2014 04:51:35 -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 1WLXD9-0007Ju-3D for rs_out_1@blacksheep.org; Thu, 06 Mar 2014 12:15:39 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1WLXD8-0007Jl-Lt for rsgb_lf_group@blacksheep.org; Thu, 06 Mar 2014 12:15:38 +0000 Received: from mailfe07.swip.net ([212.247.154.193] helo=swip.net) by relay1.thorcom.net with esmtps (SSLv3:DES-CBC3-SHA:168) (Exim 4.82) (envelope-from ) id 1WLXD6-00033k-Tc for rsgb_lf_group@blacksheep.org; Thu, 06 Mar 2014 12:15:37 +0000 X-T2-Spam-Status: No, hits=0.0 required=5.0 tests=NORMAL_HTTP_TO_IP Received: from [81.224.101.42] (account cxu-dcw-tyr@tele2.se HELO [192.168.1.2]) by mailfe07.swip.net (CommuniGate Pro SMTP 5.4.4) with ESMTPSA id 481863462 for rsgb_lf_group@blacksheep.org; Thu, 06 Mar 2014 13:15:34 +0100 Message-ID: <531866F6.7050207@tele2.se> Date: Thu, 06 Mar 2014 13:15:50 +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> <5317A9C5.2050303@tele2.se> <5317B98D.3070205@abelian.org> In-Reply-To: <5317B98D.3070205@abelian.org> X-Enigmail-Version: 1.6 X-HELO-Warning: Remote host 212.247.154.193 (mailfe07.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: May thanks for the files Paul! Paul Nicholson wrote: > Well that 24dB is a 5 hour integration in 55uHz. It > makes a big sharp line on the spectrum though. At > VLF that counts as 'armchair'. Yes. It will never become a popular "realtime chat mode" of course... [...] 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 [212.247.154.193 listed in list.dnswl.org] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record 0.0 NORMAL_HTTP_TO_IP URI: Uses a dotted-decimal IP address in URL X-Scan-Signature: b77892ad90d0261eaf071f4f6cf31464 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=0.2 required=5.0 tests=NORMAL_HTTP_TO_IP 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 May thanks for the files Paul! Paul Nicholson wrote: > Well that 24dB is a 5 hour integration in 55uHz. It > makes a big sharp line on the spectrum though. At > VLF that counts as 'armchair'. Yes. It will never become a popular "realtime chat mode" of course... > No problem. 5 hours compressed into 22.5 seconds > and frequency shifted so that 29499 Hz is moved > to 400 Hz. wav format 32k samples/sec mono 1.4 Mbyte > > http://67.207.143.181/wh2xba1_140303a.wav > > How good is your 'CW ear' I wonder? Not exactly armchair copy but by looping the file a couple of times for "mental integration" I got XBA XBA XBA without any doubt. Yes, the second file wh2xba1_140303b.wav was slightly easier to read due to the higher CW speed. Thank you for the music Bob! An MFSK system with integrate-and-dump detectors synchronized to the TX should be capable of conveying quite a number of bits per hour. The low speed would allow many tones in a small BW. Some tones could even be reserved for commonly used words or sentences like "It is not raining in Tokyo also" :-) 73 Johan