Return-Path: Received: from rly-mb05.mx.aol.com (rly-mb05.mail.aol.com [172.21.131.163]) by air-mb01.mail.aol.com (v123.4) with ESMTP id MAILINMB012-d0b4a256e58156; Tue, 02 Jun 2009 14:24:45 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mb05.mx.aol.com (v123.4) with ESMTP id MAILRELAYINMB057-d0b4a256e58156; Tue, 02 Jun 2009 14:24:27 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1MBYe2-0001SL-FG for rs_out_1@blacksheep.org; Tue, 02 Jun 2009 19:23:30 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1MBYe2-0001SC-35 for rsgb_lf_group@blacksheep.org; Tue, 02 Jun 2009 19:23:30 +0100 Received: from c2beaomr09.btconnect.com ([213.123.26.187]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1MBYdu-00025b-FW for rsgb_lf_group@blacksheep.org; Tue, 02 Jun 2009 19:23:30 +0100 Received: from [192.168.1.64] (host86-130-168-40.range86-130.btcentralplus.com [86.130.168.40]) by c2beaomr09.btconnect.com (MOS 3.8.6-GA) with ESMTP id COU82641; Tue, 2 Jun 2009 19:23:14 +0100 (BST) Message-ID: <4A256E12.2060401@btconnect.com> Date: Tue, 02 Jun 2009 19:23:14 +0100 From: Richard Newstead User-Agent: Thunderbird 2.0.0.21 (Windows/20090302) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <365C02722DD64F70B7C17A3A18F5978E@JimPC> In-Reply-To: <365C02722DD64F70B7C17A3A18F5978E@JimPC> X-Junkmail-Status: score=10/50, host=c2beaomr09.btconnect.com X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A0B0202.4A256E13.00A9,ss=1,fgs=0, ip=192.168.1.64, so=2007-10-30 19:00:17, dmn=5.7.1/2009-05-14 X-Junkmail-IWF: false X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: 136k/500k Grounding experiments (long!) Content-Type: text/plain; charset=ISO-8859-1; format=flowed 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=0.0 required=5.0 tests=none 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 X-Mailer: Unknown (No Version) James Moritz wrote: > > Over the last few days I have been doing some experiments with ground > systems with my LF/MF antenna. > > Jim Thank you for your detailed and well thought out review of earthing - the experimental results were especially interesting. I am intrigued about loaded radials in that the loading is effectively supplied by the inductor in the ATU circuit. There was no sign that such an approach worked on my last trip but possibly the inductance was insufficient. I am looking forward to my next 500kHz outing - 10GHz has taken priority recently. 73 Richard G3CWI