Return-Path: Received: (qmail 26127 invoked from network); 10 May 2001 13:17:41 -0000 Received: from unknown (HELO guinness.servers.plus.net) (212.159.3.230) by excalibur.plus.net with SMTP; 10 May 2001 13:17:41 -0000 Received: (qmail 16737 invoked from network); 10 May 2001 13:04:18 -0000 Content-Transfer-Encoding: 8bit Received: from post.thorcom.com (212.172.148.70) by mx.last.plus.net with SMTP; 10 May 2001 13:04:18 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 14xq5Q-00075l-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 10 May 2001 14:02:32 +0100 X-MSMail-Priority: Normal Received: from fm215.facility.pipex.com ([194.131.104.225]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 14xq5M-00075d-00 for rsgb_lf_group@blacksheep.org; Thu, 10 May 2001 14:02:29 +0100 Received: from 233.pncl.co.uk (116.234.35.212.in-addr.arpa.ip-pool.cix.co.uk [212.35.234.116]) by fm215.facility.pipex.com (8.9.3/8.9.3) with ESMTP id NAA11634 for ; Thu, 10 May 2001 13:54:56 +0100 (BST) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <5.0.2.1.2.20010510135810.00a18470@mail.pncl.co.uk> X-Sender: blanch@mail.pncl.co.uk X-Mailer: QUALCOMM Windows Eudora Version 5.0.2 Date: Thu, 10 May 2001 14:02:05 +0100 To: rsgb_lf_group@blacksheep.org From: "Walter Blanchard" Subject: Re: LF: harmonics / LF antenna In-reply-to: <3.0.1.16.20010510132736.2c87c87a@mail.cc.kuleuven.ac.be> References: <004401c0d92c$0f19a060$af6e74d5@w8k3f0> <65AECDF1F89AD411900400508BFC869F9C0491@pdw-mail-1.dera.gov.uk> <3AFA2E4C.EBB3C4EF@alg.demon.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 14:27 10/05/01 Thursday, Rik wrote: >So sending a few 100W square wave into a big antenna is not really >recommended. > >73, Rik ON7YD We had a Loran-C transmitter design in 1980 that delivered a square wave into the antenna and depended on antenna Q for pulse shaping. It proved impossible to maintain Q to the required accuracy!! Walter G3JKV.