Return-Path: Received: (qmail 6352 invoked from network); 15 Jan 2001 22:55:27 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 15 Jan 2001 22:55:27 -0000 Received: (qmail 861 invoked from network); 15 Jan 2001 22:58:08 -0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 15 Jan 2001 22:58:08 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14IIT2-0000eY-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 15 Jan 2001 22:51:12 +0000 Received: from anchor-post-33.mail.demon.net ([194.217.242.91]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14IISu-0000eN-00 for rsgb_lf_group@blacksheep.org; Mon, 15 Jan 2001 22:51:04 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from pickmere.demon.co.uk ([158.152.117.143]) by anchor-post-33.mail.demon.net with smtp (Exim 2.12 #1) id 14IISi-000NGo-0X for rsgb_lf_group@blacksheep.org; Mon, 15 Jan 2001 22:50:53 +0000 Message-ID: Date: Mon, 15 Jan 2001 19:10:54 +0000 To: rsgb_lf_group@blacksheep.org From: "M.J.Powell" Subject: Re: LF: Faraday Shield over roads References: In-reply-to: MIME-Version: 1.0 X-Mailer: Turnpike Integrated Version 4.02 S Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In message , Soegiono, Gamal writes >Hello Mike > >MJP> It is also very interesting that the road under the aerials >MJP> has been covered by a form of Faraday shield held up by >MJP> telegraph poles, distance apart about 15 metres. >MJP> I wonder why? > >Such a "faraday shield" can be found here in DL as well. They serve to >protect the traffic on the road from becoming entangled with over-head high >tension lines when broken acidently (under heavy iceing). > >Unless the wire cage alias faraday shield has good electrical >connection to local ground, it will not serve as a shield. >It will just float in synchronism with the LF EM field. Thanks, Gamal. I must examine the earthing next time pass under! Mike -- M.J.Powell