Return-Path: Received: (qmail 23886 invoked from network); 29 Apr 2003 15:04:06 -0000 Received: from netmail01.services.quay.plus.net (212.159.14.219) by mailstore with SMTP; 29 Apr 2003 15:04:06 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 4539 invoked by uid 10001); 29 Apr 2003 15:04:06 -0000 Received: from post.thorcom.com (193.82.116.70) by netmail01.services.quay.plus.net with SMTP; 29 Apr 2003 15:04:06 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 19AWdt-0006KI-7W for rsgb_lf_group-outgoing@blacksheep.org; Tue, 29 Apr 2003 16:03:37 +0100 Received: from [64.136.30.74] (helo=m11.lax.untd.com) by post.thorcom.com with smtp (Exim 4.14) id 19AWdh-0006Ik-5P for rsgb_lf_group@blacksheep.org; Tue, 29 Apr 2003 16:03:25 +0100 Received: from cookie.untd.com by cookie.untd.com for <"yokUgcxCbtTP7XLrpefewM99c0uV6ZuO1PwN+nyMXJki/9db7x0AjA==">; Tue, 29 Apr 2003 08:01:59 PDT Received: (from riese-k3djc@juno.com) by m11.lax.untd.com (jqueuemail) id HWXM6VKM; Tue, 29 Apr 2003 08:01:59 PDT To: rsgb_lf_group@blacksheep.org Date: Tue, 29 Apr 2003 11:01:14 -0700 Message-ID: <20030429.110115.120.1.riese-k3djc@juno.com> X-Mailer: Juno 5.0.13 MIME-Version: 1.0 X-Juno-Line-Breaks: 0-9,11-21 From: riese-k3djc@juno.com Subject: Re: LF: LF Tuning meter Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-6.2 required=5.0tests=EMAIL_ATTRIBUTION,FORGED_JUNO_RCVD,NO_REAL_NAME, QUOTED_EMAIL_TEXTversion=2.53 X-Spam-Checker-Version: SpamAssassin 2.53 (1.174.2.15-2003-03-30-exp) X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Jim Include me when you send the PDF file I have been looking at the info in the LF ,RSGB handbook . I have not wanted to drag the scope out to the antenna Bob K3DJC On Tue, 29 Apr 2003 15:36:44 +0100 James Moritz writes: > Dear LF Group, > > For tuning LF antennas, I have for some time been using an > oscilloscope to > monitor the current and voltage waveforms at the TX output. > Resonance > occurs when V and I are in phase, and the load resistance is 50ohms > when > V/I = 50. This is very easy to use provided a scope is to hand, but > not > very useful if it isn't.