Return-Path: Received: from rly-mc11.mx.aol.com (rly-mc11.mail.aol.com [172.21.164.95]) by air-mc03.mail.aol.com (v124.15) with ESMTP id MAILINMC032-da24a553ffd18; Wed, 08 Jul 2009 20:55:48 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mc11.mx.aol.com (v124.15) with ESMTP id MAILRELAYINMC112-da24a553ffd18; Wed, 08 Jul 2009 20:55:28 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1MOhtw-0007tw-0r for rs_out_1@blacksheep.org; Thu, 09 Jul 2009 01:54:16 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1MOhtv-0007tn-DH for rsgb_lf_group@blacksheep.org; Thu, 09 Jul 2009 01:54:15 +0100 Received: from smtp822.mail.ird.yahoo.com ([217.146.188.232]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1MOhtp-0001lB-PW for rsgb_lf_group@blacksheep.org; Thu, 09 Jul 2009 01:54:10 +0100 Received: (qmail 68351 invoked from network); 9 Jul 2009 00:54:07 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btopenworld.com; h=Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:Subject:Date:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=q5voMqyMHwltVgGucWOe5imr4PLfCEGZUbt0KJAje37pO1nM2JdQM/YBImjwmxJv758JdMVvqR2V9SvM4KDNM+p487cDGOHKKB6KlYz0uH40rAVv70fT2Igfz9NP+8Ntq0VxuP7MNcFSwAKe8Evsic3XBxgpM9TAEXibxAUyrjE= ; Received: from unknown (HELO JimPC) (james.moritz@86.177.107.213 with login) by smtp822.mail.ird.yahoo.com with SMTP; 9 Jul 2009 00:54:07 -0000 X-Yahoo-SMTP: qKIhhNCswBB2TTHr2BORWcGGR2mpopxhCcunGIxpCKQYiG07Q7UOhNo- X-YMail-OSG: 24f.ofEVM1kzu4Bx0sPofNIoVGNt6wrl.din1BlV9.U0awWVDlckwSXV65mpS4VdjL7AoSruJ3hVT7PqftNThCPktpdZroHPsM9Cr7jif68cEhBjSAxDQR7JvzkbWf8240OwdTgqfA80LXDHscCqp2xZga9sEd1khcVdJZt1.MtVfq28sWnyNJJuaMjQk9c6FoV7n9hsAInH8n7L_J_poqFCCw8ATo3NsRhkwW3j2Oo9PMZPFedNVG1Rkwy_YvgWsgKeg03oUzNvL76dP0dqtSXtPB8ccHuudgbC00EfqQaPsjW9rhPFFnFoms_F9TAVcQz3d9CxfHyFbcaFCr8BpszufYx2I7332a9IQR0avoahZcC6eo3pv4Y2fqudXDgg X-Yahoo-Newman-Property: ymail-3 Message-ID: <3ED0CD52FE44410585B4FD49BC73AF8C@JimPC> From: "James Moritz" To: Date: Thu, 9 Jul 2009 01:54:09 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6001.18000 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 X-Karma: unknown: DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: LF Tuning Aids Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.1 required=5.0 tests=MISSING_OUTLOOK_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-AOL-IP: 193.82.116.20 Dear LF Group, I have just uploaded a file (LF_tuning_aids.pdf) to the UK500kHz group site at http://groups.google.com/group/uk500khz/files. This is an updated/expanded version of my old "LF tuning meter" article that has been on G3YXM's web pages for some time. It describes a number of devices for monitoring antenna matching I have used on 136kHz and 500kHz, including: -The original 136kHz LF tuning meter design, indicating voltage, current and phase, with updates for dual band 136k/500k use. -The "Scopematch", for displaying antenna feeder voltage and current waveforms on a dual trace scope -A couple of simple SWR bridge designs Hope it proves to be of interest - any comments welcome. Cheers, Jim Moritz 73 de M0BMU