Return-Path: Received: (qmail 11180 invoked from network); 17 Aug 2001 13:50:02 -0000 Received: from unknown (HELO warrior-inbound.services.quay.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 17 Aug 2001 13:50:02 -0000 Received: (qmail 8937 invoked from network); 17 Aug 2001 13:49:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 17 Aug 2001 13:49:59 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15Xjts-0002sb-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 17 Aug 2001 14:43:00 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from out2.prserv.net ([32.97.166.32] helo=prserv.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15Xjtn-0002sW-00 for rsgb_lf_group@blacksheep.org; Fri, 17 Aug 2001 14:42:55 +0100 Received: from ieee.org (slip-32-103-10-134.md.us.prserv.net[32.103.10.134]) by prserv.net (out2) with SMTP id <2001081713420520200fkeg9e>; Fri, 17 Aug 2001 13:42:06 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3B7D1FE7.3BF1CC1A@ieee.org> Date: Fri, 17 Aug 2001 09:45:12 -0400 From: "Andre Kesteloot" X-Mailer: Mozilla 4.7 [en]C-CCK-MCD NSCPCD47 (WinNT; I) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Europe 1 antennas References: Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: James Moritz wrote: > If I understand it correctly, the french text of the Europe 1 web > pages (http://home.worldnet.fr/~tvignaud/am/e1/fr-e1.htm) says the > forward gain of the antenna is 3, and signals off the back of the > antenna are attenuated by "1/1000", presumably a forward gain of > about 5dB, and -30dB front to back ratio. The text reads: Les antennes sont constituées de 4 pylônes métalliques. L'entre-axes est de 350 m. Les hauteurs : 270, 276, 280 et 282 m. Les pylônes sont de section triangulaire de 3 m de côté. La distribution des puissances sont 2 %, 56 %, 41 %, 1 % pour un diagramme de rayonnement de 220° (sud-ouest) avec un gain de 3 et un affaiblissement des minimums arrières supérieur à 1/1000. La prise de terre est constituée d'un câble de cuivre de 3 mm de diamètre enfoui à 30 cm et d'une longueur de 195 km. Four metal towers constitute the antenna.. The distance between those towers is 350 meters. Respective heights: 270, 276, 280 and 283 meters. The towers have a triangular section, 3 meter on the side. Power distribution [to each tower] is 2%. 56%, 41% 1% for a radiation pattern of 220 degrees (south west) with a gain of 3, and an attenuation of the rear lobes better than 1/1000. The ground connection is made of a 3 millimeter diameter copper cable, buried 30 cm under the ground, and 195 kilometer long. 73 André N4ICK