Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dg04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 32EA2380000AA; Sat, 10 Mar 2012 17:36:28 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1S6UsH-0002Pl-6y for rs_out_1@blacksheep.org; Sat, 10 Mar 2012 22:34:53 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1S6UsG-0002Pc-G2 for rsgb_lf_group@blacksheep.org; Sat, 10 Mar 2012 22:34:52 +0000 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1S6UsF-00074K-HS for rsgb_lf_group@blacksheep.org; Sat, 10 Mar 2012 22:34:52 +0000 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id q2AMYngY027595 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 10 Mar 2012 23:34:50 +0100 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id q2AMYmcc024740; Sat, 10 Mar 2012 23:34:49 +0100 Message-ID: <4F5BD6FD.7080709@iup.uni-heidelberg.de> Date: Sat, 10 Mar 2012 23:34:37 +0100 From: =?ISO-8859-15?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org CC: Paul , Mike Smith X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: LF: VLF surprise 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: 0:2:364650208:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d410c4f5bd76b4277 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none VLF, I just build an arrangement of 2 orthogonal delta loops with a circumference of 10m. They are not resonated and there is still no preamp in use, so they are directly connected to the soundcard. They are made out of CAT5 STP cable, so it is a shielded loop with 8 turns. Now it is possible to run SpecLab in the Colour Direction Finder mode. Tonite i will be silent on LF just to see how the wideband windows look on VLF. That is a new dimension for me, like switching from black-white TV to colour TV ;-) Sensitivity is about 15 dB down to the E field grabber on the building. This loop is 7m above ground but on the ground of the 2nd floor of that building. Room for improvements. Anyway it is most interesting to see the different colours of DHO38. See http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html 73, Stefan/DK7FC