Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-me01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 72C9C3800009D; Sun, 1 Apr 2012 02:38:51 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SEEQO-0002XB-83 for rs_out_1@blacksheep.org; Sun, 01 Apr 2012 07:38:04 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SEEQN-0002X2-RK for rsgb_lf_group@blacksheep.org; Sun, 01 Apr 2012 07:38:03 +0100 Received: from mout6.freenet.de ([195.4.92.96]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1SEEQL-0003DO-Uf for rsgb_lf_group@blacksheep.org; Sun, 01 Apr 2012 07:38:03 +0100 Received: from [195.4.92.141] (helo=mjail1.freenet.de) by mout6.freenet.de with esmtpa (ID dl4yhf@freenet.de) (port 25) (Exim 4.76 #1) id 1SEEQK-00060i-R7 for rsgb_lf_group@blacksheep.org; Sun, 01 Apr 2012 08:38:00 +0200 Received: from localhost ([::1]:54827 helo=mjail1.freenet.de) by mjail1.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.76 #1) id 1SEEQK-0000Fg-NF for rsgb_lf_group@blacksheep.org; Sun, 01 Apr 2012 08:38:00 +0200 Received: from [195.4.92.19] (port=45624 helo=9.mx.freenet.de) by mjail1.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.76 #1) id 1SEENh-0008WL-T5 for rsgb_lf_group@blacksheep.org; Sun, 01 Apr 2012 08:35:17 +0200 Received: from blfd-4db02ef7.pool.mediaways.net ([77.176.46.247]:2621 helo=[192.168.178.22]) by 9.mx.freenet.de with esmtpsa (ID dl4yhf@freenet.de) (TLSv1:CAMELLIA256-SHA:256) (port 465) (Exim 4.76 #1) id 1SEENh-0007N9-5C for rsgb_lf_group@blacksheep.org; Sun, 01 Apr 2012 08:35:17 +0200 Message-ID: <4F77F724.4000308@freenet.de> Date: Sun, 01 Apr 2012 08:35:16 +0200 From: wolf_dl4yhf User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:11.0) Gecko/20120327 Thunderbird/11.0.1 MIME-Version: 1.0 To: RSGB LF Group X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: LF: Origin of mystery staircase signal solved Content-Type: text/plain; charset=ISO-8859-15; format=flowed 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=0.0 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: 0:2:417373536:93952408 x-aol-sid: 3039ac1d60894f77f7fa5062 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Greetings all, Peter, DF3LP, has now finally found the origin of the mystery "staircase" signal on VLF, 12 to 15 kHz. That signal had previously been pinpointed by Paul in Todmorden, and bearings verified by other means. http://tech.groups.yahoo.com/group/VLF_Group/message/19298 The Bockshorn-effect is remarkable.. and possibly a solution for all kinds of problems (limited garden space, unefficient antennas, ... ) Who will be the first radio amateur to build a reduced version of the phantastic OAM antenna ? Peter has more photos on request, just in case you need more details. Have a great sunday everyone, 73, Wolf .