Return-Path: Received: from mtain-dd06.r1000.mx.aol.com (mtain-dd06.r1000.mx.aol.com [172.29.64.146]) by air-dd05.mail.aol.com (v129.4) with ESMTP id MAILINDD051-860b4d9643f22e6; Fri, 01 Apr 2011 17:30:26 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dd06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 89DC43800008D; Fri, 1 Apr 2011 17:30:25 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Q5lto-0007sH-Fi for rs_out_1@blacksheep.org; Fri, 01 Apr 2011 22:28:56 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Q5ltn-0007s8-LF for rsgb_lf_group@blacksheep.org; Fri, 01 Apr 2011 22:28:55 +0100 Received: from relay.uni-heidelberg.de ([129.206.100.212]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Q5ltl-0004Yw-UW for rsgb_lf_group@blacksheep.org; Fri, 01 Apr 2011 22:28:55 +0100 Received: from ix.urz.uni-heidelberg.de (cyrus-portal.urz.uni-heidelberg.de [129.206.100.176]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id p31LSqf3019274 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 1 Apr 2011 23:28:53 +0200 Received: from extmail.urz.uni-heidelberg.de (extmail.urz.uni-heidelberg.de [129.206.100.140]) by ix.urz.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id p31LSqsI008818 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 1 Apr 2011 23:28:52 +0200 Received: from [147.142.8.58] (vpn508-058.rzuser.uni-heidelberg.de [147.142.8.58]) by extmail.urz.uni-heidelberg.de (8.13.4/8.13.1) with ESMTP id p31LSoXg020775 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 1 Apr 2011 23:28:52 +0200 Message-ID: <4D9643A2.2000606@iup.uni-heidelberg.de> Date: Fri, 01 Apr 2011 23:29:06 +0200 From: =?ISO-8859-15?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.11) Gecko/20100711 Thunderbird/3.0.6 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: LF: LF antenna progress at DK7FC 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-sid: 3039ac1d40924d9643f07668 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) LF, I'm happy to have my LF "office" antenna almost finished. Today i connected the coil in its end position to the 90m wire in 35m height. A massive isolator fixes the feedes which is out of copper tube. See some photos at http://dl.dropbox.com/u/19882028/feeder.JPG http://dl.dropbox.com/u/19882028/little%20isolator.JPG http://dl.dropbox.com/u/19882028/hidden%20coil.JPG BTW, matching is done by using a galvanic decoupled primary coil (10 cm diameter) inside the main LF coil (20 cm diameter) and the cable to the PA is CAT5 LAN cable! This is because i will chosse a H bridge as the PA which which have main potential and i want to shield both wires which are 2x 4insulated wires now. This may be even better than RG58 regarding skin losses :-) 73, Stefan/DK7FC PS: I can see the antenna wire out of 800m distance :-)