Return-Path: Received: (qmail 25462 invoked from network); 25 Oct 2001 11:06:03 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur.plus.net with SMTP; 25 Oct 2001 11:06:03 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 886 invoked from network); 25 Oct 2001 10:50:45 -0000 Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 25 Oct 2001 10:50:45 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 15wi3Q-0002KR-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 25 Oct 2001 11:48:04 +0100 Received: from [213.2.16.106] (helo=rsgb.org.uk) by post.thorcom.com with esmtp (Exim 3.33 #2) id 15wi3P-0002KM-00 for rsgb_lf_group@blacksheep.org; Thu, 25 Oct 2001 11:48:03 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.PRO.v4.0.0.R) for ; Thu, 25 Oct 2001 11:41:32 +0100 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Thu, 25 Oct 2001 11:41:29 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: Re: Loading coils and shorted turns Message-ID: <3BD7FA69.27653.8B5C60@localhost> In-reply-to: X-Mailer: Pegasus Mail for Win32 (v3.12c) X-Return-Path: miked@mail X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: A factor to be taken into account when deciding whether to have shorted turns or an open coil is the possible corona discharge from an open end. This will also introduce losses. For a fixed station (portable is different as the antenna characteristics are difficult to predict) I would suggest a coil that is just too short, followed by a variometer. Of course this needs some experimentation, but during the experimental period it doesn't really matter whether the turns are shorted or open. Mike, G3XDV (IO91VT) http://www.lf.thersgb.net