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LF: Europe 1 antennas

To: [email protected]
Subject: LF: Europe 1 antennas
From: "Andre Kesteloot" <[email protected]>
Date: Fri, 17 Aug 2001 09:45:12 -0400
References: <[email protected]>
Reply-to: [email protected]
Sender: <[email protected]>
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



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