Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mk02.r1000.mx.aol.com (Internet Inbound) with ESMTP id ECF79380000C7; Tue, 8 Nov 2011 14:26:04 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RNrHo-0005a4-Sn for rs_out_1@blacksheep.org; Tue, 08 Nov 2011 19:24:44 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RNrHo-0005Zv-Gc for rsgb_lf_group@blacksheep.org; Tue, 08 Nov 2011 19:24:44 +0000 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RNrHn-0001R3-Av for rsgb_lf_group@blacksheep.org; Tue, 08 Nov 2011 19:24:44 +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 pA8JOf5e016067 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 8 Nov 2011 20:24:42 +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 pA8JOeFh024984 for ; Tue, 8 Nov 2011 20:24:40 +0100 Message-ID: <4EB981B2.90607@iup.uni-heidelberg.de> Date: Tue, 08 Nov 2011 20:23:30 +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 References: <4EB6E548.7010206@iup.uni-heidelberg.de> In-Reply-To: <4EB6E548.7010206@iup.uni-heidelberg.de> X-MIME-Autoconverted: from 8bit to quoted-printable by relay2.uni-heidelberg.de id pA8JOf5e016067 X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: Arcing... Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: quoted-printable 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: 0:2:440446880:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d61864eb9824c46fc X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none That will solve the problem:=20 http://dl.dropbox.com/u/19882028/LF/Electrode.JPG 73 to all. Stefan Am 06.11.2011 20:51, schrieb Stefan Sch=E4fer: > Seems i need some improvements on the spark gap of my LF antenna.=20 > Depending on the humidity and wind there is some arcing during the=20 > transmissions. These look very fascinating i find. Anyway i have to=20 > add a spherical electrode there and increase the gap distance,=20 > especially for VLF ;-) > > A working colleague of me is a (semi) proffessional photographer=20 > (hobby) and i asked him to take some nice pictures. He has an=20 > excellent equipment i find but he means he should have taken a=20 > different lens for these pictures. Anyway, i really like them. > When arcing at the ends of a LF antenna is discussed, sometimes a=20 > picture can help a newcomer what is meant. Here are some more=20 > examples, in high resolution (abt. 3 MB each) > > http://dl.dropbox.com/u/19882028/LF/20111106-19h54m07s-FF7_8461.jpg > http://dl.dropbox.com/u/19882028/LF/20111106-19h58m31s-FF7_8466.jpg > http://dl.dropbox.com/u/19882028/LF/20111106-20h02m13s-FF7_8470.jpg > http://dl.dropbox.com/u/19882028/LF/20111106-20h03m58s-FF7_8472.jpg > > 73, Stefan/DK7FC