Return-Path: X-Spam-DCC: paranoid 1233; 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 tA9ICBLw013048 for ; Mon, 9 Nov 2015 19:12:11 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Zvqqk-0001HZ-CP for rs_out_1@blacksheep.org; Mon, 09 Nov 2015 18:07:26 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Zvqqk-0001HQ-4X for rsgb_lf_group@blacksheep.org; Mon, 09 Nov 2015 18:07:26 +0000 Received: from parrot.netcom.co.uk ([217.72.171.49]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1Zvqpf-0002dz-VM for rsgb_lf_group@blacksheep.org; Mon, 09 Nov 2015 18:07:25 +0000 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 5E5903273A5 for ; Mon, 9 Nov 2015 17:57:38 +0000 (GMT) Received: from [127.0.0.1] (localhost [127.0.0.1]) by sb.abelian.org (Postfix) with ESMTP id 239E128A0120 for ; Mon, 9 Nov 2015 18:06:05 +0000 (UTC) Message-ID: <5640E08C.40403@abelian.org> Date: Mon, 09 Nov 2015 18:06:04 +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: <563F7410.20902@freenet.de> <563FA25A.7060602@abelian.org> <563FBE6F.6020606@posteo.de> <563FC364.1050606@abelian.org> In-Reply-To: X-Scan-Signature: e90dcb17768c7e768f13e0721cc1c0c7 Subject: Re: LF: VLF Tinkering 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: 4944 Joe VO1NA wrote: > A GPS unit is now on hand. It provides NMEA strings but > I'm not sure about the pps. PPS essential if you're using Spectrum Lab or vlfrx-tools. The GPS that I use these days is this one http://uk.mouser.com/ProductDetail/mikroElektronika/MIKROE-362/?qs=sGAEpiMZZMuNcqZxhMNT368vTF1vBnGt http://www.mikroe.com/eng/products/view/122/smartgps-board/ After some arithmetic and comparison with other signals, I reckon that if you can muster 40uW, it will be possible to decode messages at 8277 Hz here the UK, and 20uW would be enough for a carrier detection. That assumes a suitably precise oscillator. -- Paul Nicholson --