Return-Path: Received: (qmail 13663 invoked from network); 18 Jan 2001 21:44:15 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by extortion.plus.net with SMTP; 18 Jan 2001 21:44:15 -0000 Received: (qmail 8060 invoked from network); 18 Jan 2001 21:46:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Jan 2001 21:46:59 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14JMkb-0003vU-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 18 Jan 2001 21:37:45 +0000 Received: from amersham.mail.uk.easynet.net ([195.40.1.45]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14JMkb-0003vP-00 for rsgb_lf_group@blacksheep.org; Thu, 18 Jan 2001 21:37:45 +0000 Received: from ericadodd (tnt-3-170.easynet.co.uk [195.40.202.170]) by amersham.mail.uk.easynet.net (Postfix) with SMTP id 2A016176EB for ; Thu, 18 Jan 2001 21:37:07 +0000 (GMT) Message-ID: <002f01c08197$075f3a20$aaca28c3@ericadodd> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <5.0.2.1.2.20010115093244.00a18b40@mail.pncl.co.uk> Subject: Re: LF: coil screening Date: Thu, 18 Jan 2001 21:35:47 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Further to Walters e-mail: > Gamal says it all. It was impossible to keep the Decca coils tuned > accurately and maintain phase constancy without the copper screening. There is a photo in the Low Frequency Handbook, page 13, that shows the Decca loading coils and the walls of the ATU building, with Lech, G3KAU; this gives some idea of the coil and building dimensions. There were some aluminium boxes around the Decca site containing coils. I always felt that the boxes were rather large for the size of the coils inside them - now I know why Regards, Peter, G3LDO .