Return-Path: Received: from mtain-df05.r1000.mx.aol.com (mtain-df05.r1000.mx.aol.com [172.29.64.217]) by air-da01.mail.aol.com (v129.4) with ESMTP id MAILINDA014-86614ced55bc25e; Wed, 24 Nov 2010 13:13:17 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-df05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 822B338000103; Wed, 24 Nov 2010 13:13:15 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PLJpQ-00088D-Ke for rs_out_1@blacksheep.org; Wed, 24 Nov 2010 18:12:24 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PLJpQ-000884-8W for rsgb_lf_group@blacksheep.org; Wed, 24 Nov 2010 18:12:24 +0000 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PLJpP-0006vx-Eb for rsgb_lf_group@blacksheep.org; Wed, 24 Nov 2010 18:12:24 +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 oAOIBbCl005191 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 24 Nov 2010 19:11:37 +0100 Received: from [129.206.29.99] (pc99.iup.uni-heidelberg.de [129.206.29.99]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id oAOICM6l017731 for ; Wed, 24 Nov 2010 19:12:22 +0100 Message-ID: <4CED54DA.9030503@iup.uni-heidelberg.de> Date: Wed, 24 Nov 2010 19:09:30 +0100 From: =?ISO-8859-1?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 References: <373372.70115.qm@web28506.mail.ukl.yahoo.com> <4CEAE16C.5030101@iup.uni-heidelberg.de> <294616.39798.qm@web28506.mail.ukl.yahoo.com> <4CEBEEDF.6000301@iup.uni-heidelberg.de> <001d01cb8bc3$438cb6d0$4001a8c0@lark> <4CED1834.4020702@iup.uni-heidelberg.de> <0C8AD8E8-C85A-4BE1-B405-8F3C02292CAB@hurontel.on.ca> In-Reply-To: <0C8AD8E8-C85A-4BE1-B405-8F3C02292CAB@hurontel.on.ca> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: VLF G3XIZ - QRT Content-Type: text/plain; charset=ISO-8859-1; 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: 3039ac1d40d94ced55bb7442 X-AOL-IP: 195.171.43.25 X-Mailer: Unknown (No Version) Hi John, It looks professional! What is the maximum spark length you can achieve? You are using a motor and a rotating contact to switch the primary to a capacitor bank? Would be interesting if i would do the same on my VLF kite antenna ;-) Would give a nice broad spectrum, hi. 73, Stefan Am 24.11.2010 18:57, schrieb John Bruce McCreath: > Hello Stefan, > > You wrote:> Just like Tesla transformers are fed with a primary winding of some turns, something between 5 and 20 probably. > > Take a look on my web site for pictures of my 3 KVA Tesla coil which shows the primary-secondary coupling: > > http://www.hurontel.on.ca/~weazle > > Fine tuning is required to get the maximum streamer length and a tap move of only a few inches can make a HUGE difference. > On my LowFER beacon I couple the final to the bottom of my loading coil/variometer with three turns wound to sit in the > "valley" that is between the loading coil's winding of #12 THHN wire. I'm sure it would work at higher power. > > 73, J.B., VE3EAR > > LowFER Beacon "EAR" > 188.830 kHz. QRSS30 > EN93dr > > > > > > >