Return-Path: Received: (qmail 635 invoked from network); 30 Jan 2000 15:29:36 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by bells.core.plus.net.uk with SMTP; 30 Jan 2000 15:29:36 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12EwAM-0001wm-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 30 Jan 2000 15:21:30 +0000 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Received: from anchor-post-34.mail.demon.net ([194.217.242.92]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12EwAM-0001wh-00 for rsgb_lf_group@blacksheep.org; Sun, 30 Jan 2000 15:21:30 +0000 X-Priority: 3 Received: from pickmere.demon.co.uk ([158.152.117.143]) by anchor-post-34.mail.demon.net with smtp (Exim 2.12 #1) id 12EwAG-000Gn3-0Y for rsgb_lf_group@blacksheep.org; Sun, 30 Jan 2000 15:21:25 +0000 X-MSMail-Priority: Normal Message-ID: Date: Sun, 30 Jan 2000 13:40:52 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 To: rsgb_lf_group@blacksheep.org From: "M.J.Powell" Subject: Re: LF: Re: 8 kHz loading coil References: <000d01bf6a31$3bf336c0$975b97d4@win95.swipnet.se><000001bf6af3$21ac4b40$4f29f7c2@oemcomputer> In-reply-to: <000001bf6af3$21ac4b40$4f29f7c2@oemcomputer> 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 <000001bf6af3$21ac4b40$4f29f7c2@oemcomputer>, John Rabson writes >Christer, > >With the figures you give I estimate you will be getting about 100 KV across >the inductor. An air-cored coil , of substantial size, would seem to be the >best way of doing things. > >By the way, in the early days of Rugby Radio (GBR) on 16 kHz they had some >trouble with their loading coil . It appears that it overheated, and set >fire to the wooden building in which it was housed! I visited Rugby in about 1951. From the loading coil the feeder cable ran up though a circular window high up in the gable end. The clearance was about 2 feet but the wooden surround was burned and charred from flash over. When the Tx was keyed you could see the loading coil flex and jerk! Mike -- M.J.Powell