Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dc02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 2761938000092; Sun, 27 Nov 2011 08:22:53 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RUeff-0001Ts-U6 for rs_out_1@blacksheep.org; Sun, 27 Nov 2011 13:21:27 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RUeff-0001Tj-5y for rsgb_lf_group@blacksheep.org; Sun, 27 Nov 2011 13:21:27 +0000 Received: from mout0.freenet.de ([195.4.92.90]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RUefe-00021R-6D for rsgb_lf_group@blacksheep.org; Sun, 27 Nov 2011 13:21:27 +0000 Received: from [195.4.92.141] (helo=mjail1.freenet.de) by mout0.freenet.de with esmtpa (ID dl4yhf@freenet.de) (port 25) (Exim 4.76 #1) id 1RUefd-0001tT-4M for rsgb_lf_group@blacksheep.org; Sun, 27 Nov 2011 14:21:25 +0100 Received: from localhost ([::1]:41246 helo=mjail1.freenet.de) by mjail1.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.76 #1) id 1RUefd-0007JM-0R for rsgb_lf_group@blacksheep.org; Sun, 27 Nov 2011 14:21:25 +0100 Received: from [195.4.92.26] (port=42435 helo=16.mx.freenet.de) by mjail1.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.76 #1) id 1RUed5-0003Tq-4H for rsgb_lf_group@blacksheep.org; Sun, 27 Nov 2011 14:18:47 +0100 Received: from blfd-4db0fa65.pool.mediaways.net ([77.176.250.101]:3956 helo=[192.168.178.21]) by 16.mx.freenet.de with esmtpsa (ID dl4yhf@freenet.de) (TLSv1:CAMELLIA256-SHA:256) (port 465) (Exim 4.76 #1) id 1RUed4-0007Gj-Of for rsgb_lf_group@blacksheep.org; Sun, 27 Nov 2011 14:18:47 +0100 Message-ID: <4ED238B4.2000501@freenet.de> Date: Sun, 27 Nov 2011 14:18:44 +0100 From: wolf_dl4yhf User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:8.0) Gecko/20111105 Thunderbird/8.0 MIME-Version: 1.0 To: RSGB LF Group References: <4ED15F84.4020102@iup.uni-heidelberg.de> <4ED17340.1000700@abelian.netcom.co.uk> <4ED17DD0.7080003@iup.uni-heidelberg.de> <4ED210C4.4020107@abelian.netcom.co.uk> <4ED22A6C.5060205@iup.uni-heidelberg.de> In-Reply-To: <4ED22A6C.5060205@iup.uni-heidelberg.de> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: LF: Re: 8970.005 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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 x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:407127424:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d40824ed239ad679c X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi Stefan and all, Thanks for the experiment, and compliments to you, Paul, Michael, and all others sending in reports. This time I tried reception with an indoor antenna, but was plagued by QRM. However the GPS-locked reception (using a cheap Garmin GPS 18 LVC, with 1-pps-output) seems to work reasonably good, so this may be a better alternative than the VLF MSK transmitters - especially for transmission. Have a nice sunday everyone, 73, Wolf . Am 27.11.2011 13:17, schrieb Stefan Schäfer: > Just want to say thanks to Wolf/DL4YHF for SpectrumLab and its perfect > function to compensate the soundcard drift by using a reference > frequency or a VLF MSK transmitter! Without that software, there would > be almost no successful work by amateurs on VLF at all (except > listening to natural stuff). > > Using VLF MSK transmitters as the reference must work well too. There > are 47 uHz spectrograms running e.g. at G3ZJO and TF3HZ who clearly > show a streight trace on exactly 8970.005 Hz, see > http://g3zjo.bplaced.net/index.htm and > http://simnet.is/halldorgudmunds/TF3HZ_VLFgrabber/ > > 73, Stefan >