Return-Path: X-Spam-DCC: paranoid 1102; 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=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,RATWARE_GECKO_BUILD 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 t9NH8cgR012871 for ; Fri, 23 Oct 2015 19:08:39 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Zpfia-0007x4-VA for rs_out_1@blacksheep.org; Fri, 23 Oct 2015 18:01:28 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Zpfia-0007wv-Mw for rsgb_lf_group@blacksheep.org; Fri, 23 Oct 2015 18:01:28 +0100 Received: from parrot.netcom.co.uk ([217.72.171.49]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1ZpfhW-0001Gp-GT for rsgb_lf_group@blacksheep.org; Fri, 23 Oct 2015 18:01:27 +0100 Received: from sb.abelian.org (i-194-106-52-83.freedom2surf.net [194.106.52.83]) by parrot.netcom.co.uk (Postfix) with ESMTP id 6B35332740A for ; Fri, 23 Oct 2015 17:52:01 +0100 (BST) Received: from [127.0.0.1] (localhost [127.0.0.1]) by sb.abelian.org (Postfix) with ESMTP id 1B14728A0131 for ; Fri, 23 Oct 2015 17:00:05 +0000 (UTC) Message-ID: <562A6794.9050901@abelian.org> Date: Fri, 23 Oct 2015 17:00:04 +0000 From: Paul Nicholson User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <56240DC7.80007@gmail.com> <8D2D814B30F471D-460-65B811@webmail-vm120.sysops.aol.com> <562533DB.7090009@abelian.org> In-Reply-To: <562533DB.7090009@abelian.org> X-Scan-Signature: 2e2f7cbbe9f38dd7bf3fac4fc012e6fc Subject: Re: LF: Coherent BPSK on LF using EbNaut Content-Type: text/plain; charset=ISO-8859-1; 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 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 4580 I have an E-field rx running on the 137 kHz band, GPS locked. Here is the 'first light' spectrogram http://abelian.org/tmp/lf151023a.png which covers 137 kHz to 138.5 kHz. It's a bit shaky, everything held together with croc clips but hopefully will survive long enough to pick up an amateur signal or two. I'm recording 135 to 138.5 kHz. I reckon the battery is good for about 60 hours. Maybe there will be some distant unmodulated carriers to measure, or even a coherent BPSK message. 137.5 kHz looks quiet here. -- Paul Nicholson, Todmorden, UK. --