Return-Path: Received: (qmail 58365 invoked from network); 2 Jan 2005 13:56:35 -0000 Received: from unknown (HELO ptb-spamcore02.plus.net) (192.168.71.3) by ptb-mailstore01.plus.net with SMTP; 2 Jan 2005 13:56:35 -0000 Received: from mailnull by ptb-spamcore02.plus.net with spamcore-l-b (Exim 4.32; FreeBSD) id 1Cl6C1-0000bm-DU for dave@picks.force9.co.uk; Sun, 02 Jan 2005 13:54:50 +0000 Received: from [192.168.67.1] (helo=ptb-mxcore01.plus.net) by ptb-spamcore02.plus.net with esmtp (Exim 4.32; FreeBSD) id 1Cl6C1-0000bj-Ap for dave@picks.force9.co.uk; Sun, 02 Jan 2005 13:54:49 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1Cl6Di-000P50-H6 for dave@picks.force9.co.uk; Sun, 02 Jan 2005 13:56:34 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Cl6DW-00005z-Nq for rs_out_1@blacksheep.org; Sun, 02 Jan 2005 13:56:22 +0000 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Cl6DW-00005q-CE for rsgb_lf_group@blacksheep.org; Sun, 02 Jan 2005 13:56:22 +0000 Received: from fmmailgate05.web.de ([217.72.192.243]) by relay.thorcom.net with esmtp (Exim 4.41) id 1Cl6DR-00051k-Kt for rsgb_lf_group@blacksheep.org; Sun, 02 Jan 2005 13:56:22 +0000 Received: by fmmailgate05.web.de (8.12.10/8.12.10/webde Linux 0.7) with SMTP id j02DtInR025604 for rsgb_lf_group@blacksheep.org; Sun, 2 Jan 2005 14:56:11 +0100 Received: from [217.248.191.109] by freemailng1804.web.de with HTTP; Sun, 02 Jan 2005 14:56:09 +0100 Date: Sun, 02 Jan 2005 14:56:09 +0100 Message-Id: <262903953@web.de> MIME-Version: 1.0 From: "Hans-Albrecht Haffa" To: rsgb_lf_group@blacksheep.org Organization: http://freemail.web.de/ X-SPF-Result: relay.thorcom.net: 217.72.192.243 is neither permitted nor denied by domain of web.de X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=failed,none Subject: LF: Re: Power Line Rotation, & Auroral effects de VY1JA 4-Wire feeding line Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com 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-Spam-Filtered: by PlusNet SpamCORE (v3.00) Dear Peter, a description with dimension tables for feeding lines with four wires is given in our German antenna anthology: Karl Rothammel: Das Antennenbuch now available via DARC.de Bookservice or Funkamateur.de bookservice used via ebay. It is a good method, if You want to implement low characteristical impedances, say below 250 Ohm. 55, Hans-Albrecht, DK 8 ND rsgb_lf_group@blacksheep.org schrieb am 31.12.04 13:53:48: > > > > > As you travel along the highway on your next trip, with someone else at > the > > wheel, watch the high-tension lines for transitions similar to the one > > described here. Now that you know what to look for, transitions should be > > easy to spot, regardless of the line configuration. > > I seem to recall a method of transposing twin transmission line conductors > for RF at regular interval using square spacers with a hole or notch in each > corner. This was done to improve the balance over a long line. I looked > through all my antenna books but was unable top find any reference to this > technique. I guess this is the same as power line transitions described by > VY1JA. > > Peter, G3LDO > > > > > __________________________________________________________ Mit WEB.DE FreePhone mit hoechster Qualitaet ab 0 Ct./Min. weltweit telefonieren! http://freephone.web.de/?mc=021201