Return-Path: Received: from mtain-mh01.r1000.mx.aol.com (mtain-mh01.r1000.mx.aol.com [172.29.96.213]) by air-dd02.mail.aol.com (v129.4) with ESMTP id MAILINDD024-86aa4bec64a7347; Thu, 13 May 2010 16:44:23 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mh01.r1000.mx.aol.com (Internet Inbound) with ESMTP id C9447380001B3; Thu, 13 May 2010 16:44:20 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OCfFZ-0001X2-IQ for rs_out_1@blacksheep.org; Thu, 13 May 2010 21:43:21 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OCfFZ-0001Wt-5U for rsgb_lf_group@blacksheep.org; Thu, 13 May 2010 21:43:21 +0100 Received: from smtp-out30.alice.it ([85.33.2.30]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OCfFX-0007RX-50 for rsgb_lf_group@blacksheep.org; Thu, 13 May 2010 21:43:21 +0100 Received: from fbcmmo06.fbc.local ([192.168.184.137]) by smtp-out30.alice.it with Microsoft SMTPSVC(6.0.3790.3959); Thu, 13 May 2010 22:42:52 +0200 Received: from FBCMCL01B04.fbc.local ([192.168.69.85]) by fbcmmo06.fbc.local with Microsoft SMTPSVC(6.0.3790.3959); Thu, 13 May 2010 22:42:48 +0200 Received: from PCCasa ([80.116.177.11]) by FBCMCL01B04.fbc.local with Microsoft SMTPSVC(6.0.3790.3959); Thu, 13 May 2010 22:42:46 +0200 Message-ID: <9707328E302D42E38214972B9DC79309@PCCasa> From: "Daniele Tincani" To: References: <003501caf1fd$9d39a0e0$0401a8c0@xphd97xgq27nyf> <4BEBEE46.9040702@iup.uni-heidelberg.de> <4BEC496D.3000300@iup.uni-heidelberg.de> In-Reply-To: <4BEC496D.3000300@iup.uni-heidelberg.de> Date: Thu, 13 May 2010 22:42:46 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18197 X-OriginalArrivalTime: 13 May 2010 20:42:47.0042 (UTC) FILETIME=[D860A620:01CAF2DC] X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Re: Outdoor test for different places for active E-field antennas for VLF Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.1 required=5.0 tests=MISSING_OUTLOOK_NAME 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-sid: 3039ac1d60d54bec64a47fa5 X-AOL-IP: 193.82.116.20 Content-Transfer-Encoding: quoted-printable Hello Stefan, how do you connect the fiber to the antenna? I mean, how do you conver= t from=20 electric to optical? Cheers D. ----- Original Message -----=20 From: "Stefan Sch=E4fer" To: Sent: Thursday, May 13, 2010 8:48 PM Subject: VLF: Outdoor test for different places for active E-field ant= ennas=20 for VLF > Dear group, > > Today i checked 3 different places for my VLF grabber antenna. The > currently used antenna was not touched. I used a second antenna that > uses a fiber optic cable + battery that totally decouples the antenn= a > from the PC (noise!). > The first time i cheked the QTH in the 7th floor of the institute.= The > signal was 20 dB stronger and all local QRM lines are gone! > > I created a report with many photos and spectrograms to see the > difference. First it was thought to be just a notice for me but due= to > the impressing difference of the received signals i want to share it= to > other OMs who are working with active E field antennas. Sorry, it is= in > german language but perhaps you can use a online translator, if you= are > not german and interested ;-) There are some OMs planning to built= an > active antenna for VLF and some who have problems or are sceptic abo= ut > these fiber optic cables. Also some are afraid with antennas connect= ed > to the PC, when thunder storms occurr. There, the fiber optic cable= is > surely a good way to do it, we know. > So if you want to take a look, look here: > http://www.iup.uni-heidelberg.de/schaefer_vlf/Vergleichstest_Antenne= nstandorte_UNI_HD.pdf > > Wish you a nice weekend and better WX than here ;-) > > Stefan/DK7FC > ----------------------------------------------------------------------= ---------- Nessun virus nel messaggio in arrivo. Controllato da AVG - www.avg.com Versione: 9.0.819 / Database dei virus: 271.1.1/2871 - Data di rilasc= io:=20 05/13/10 08:26:00