Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS,T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v0G9Iv0b011796 for ; Mon, 16 Jan 2017 10:18:58 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cT3ID-0001pX-HA for rs_out_1@blacksheep.org; Mon, 16 Jan 2017 09:09:33 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cT3IC-0001pO-OA for rsgb_lf_group@blacksheep.org; Mon, 16 Jan 2017 09:09:32 +0000 Received: from porthos.netcom.co.uk ([217.72.171.73]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1cT3IA-0001mx-7x for rsgb_lf_group@blacksheep.org; Mon, 16 Jan 2017 09:09:31 +0000 X-DKIM-Result: Domain=abelian.org Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=abelian.org ; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:References:To:Subject:Sender:Reply-To:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=ClYYlB9fCY8mkD09frTJVOhgok6uVELQIBZqICgOv5o=; b=oPfepKtH47/LSoE9t/KVJD9qsY AFIdYlOe7cOxmQb0WLWxVlr8bHO7fM89KOgZm/7e2oDX0gcus3FgxRha/aHSfQsxydbdM3CoGO8cc RwhTCvBlSd1g8wBexvcJ1H3WvvrYG1eIpANsPMEiNopPl9cjQXf7MEcaiTFVQ1slykSk=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:39252 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1cT3I9-0005r5-6d for rsgb_lf_group@blacksheep.org; Mon, 16 Jan 2017 09:09:29 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 88FB7400044 for ; Mon, 16 Jan 2017 09:09:28 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <159526aa32e-1297-2d056@webprd-m96.mail.aol.com> <5867AA75.6030603@posteo.de> <5867DFA9.5020604@abelian.org> <58691D84.9030201@posteo.de> <586A8A05.5090901@posteo.de> <586AA7C5.8070802@abelian.org> <049501d26535$dee8b370$9cba1a50$@comcast.net> <586B5BAD.7@abelian.org> <586C4F2C.1010205@posteo.de> <586D6E99.6080509@posteo.de> <586F5D60.4030309@abelian.org> <586F7C4F.3090806@posteo.de> <586F8082.4060404@abelian.org> <5870097B.7080708@posteo.de> <58701056.20008@posteo.de> <587069F3.1010407@abelian.org> <58712E8D.9050207@posteo.de> <5873825E.4090306@posteo.de> <5873F3BC.20403@posteo.de> <587519E0.4080505@posteo.de> <5877CF56.5040802@abelian.org> <58781662.8060608@posteo.de> <587BA365.4040900@posteo.de> <587BABA4.4050108@abelian.org> <587BBD1E.5060905@posteo.de> <587BD1AC.3030709@abelian.org> <587BE3EB.5070806@posteo.de> <587BFE12.50208@posteo.de> <587C08E7.3010106@posteo.de> <587C138D.6070504@posteo.de> From: Paul Nicholson Message-ID: <587C8DC8.3040209@abelian.org> Date: Mon, 16 Jan 2017 09:09:28 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 MIME-Version: 1.0 In-Reply-To: <587C138D.6070504@posteo.de> X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - porthos.netcom.co.uk X-AntiAbuse: Original Domain - blacksheep.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - abelian.org X-Get-Message-Sender-Via: porthos.netcom.co.uk: authenticated_id: catchall@abelian.org X-Authenticated-Sender: porthos.netcom.co.uk: catchall@abelian.org X-Scan-Signature: 7001055fa59a9c23b9831ea6d317a074 Subject: Re: VLF: Carrier on 8270.0025 Hz 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 2.75 Status: O X-Status: X-Keywords: X-UID: 10199 Stefan wrote: > Since 22:45 UTC i'm running a plain and stable carrier > Carrier stopped 00:05 UTC. A strong signal! About 0.35 fT, 18.0 dB in 208uHz. Could have sent 11 chars with the 80 minute signal. vtread -T 2017-01-15_22:45,+80m /raw | # Extract signal, 3 chans vtmix -c 0.866/-20,-0.5/-35,-0.85 | # Antenna mix and phase EQ vtfilter -h bp,f=8270,w=3000 | # 3kHz bandpass vtblank -a2.2 -d0 -t1 | # Blanking vtmult -f8270.0025 | # Mix down to baseband I/Q vtresample -r240 | # Drop to 240 samples/sec vtraw -oa | # Convert to 3 column ASCII ebnaut -r240 -dp16K25A -N11 -S2.8 -PS -c8 -L350000 -v found rank 399 ber 4.0035e-01 Eb/N0 -0.6 M -2.546543181e-01 [***********] ps [ 2 30 30 30 30] > but the BEEEEP is very loud! Audible at 8270, not 16450. Can anyone explain why the sound is at the signal frequency and not the 2nd harmonic? -- Paul Nicholson --