Return-Path: Received: from mtain-ma05.r1000.mx.aol.com (mtain-ma05.r1000.mx.aol.com [172.29.96.13]) by air-db07.mail.aol.com (v129.4) with ESMTP id MAILINDB071-85f34d89220d1ed; Tue, 22 Mar 2011 18:26:21 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-ma05.r1000.mx.aol.com (Internet Inbound) with ESMTP id BEB4738000085; Tue, 22 Mar 2011 18:26:19 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Q2A0A-0003AY-NU for rs_out_1@blacksheep.org; Tue, 22 Mar 2011 22:24:34 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Q2A0A-0003AP-2m for rsgb_lf_group@blacksheep.org; Tue, 22 Mar 2011 22:24:34 +0000 Received: from imr-db01.mx.aol.com ([205.188.91.95]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Q2A08-00032h-9k for rsgb_lf_group@blacksheep.org; Tue, 22 Mar 2011 22:24:34 +0000 Received: from mtaout-mb05.r1000.mx.aol.com (mtaout-mb05.r1000.mx.aol.com [172.29.41.69]) by imr-db01.mx.aol.com (8.14.1/8.14.1) with ESMTP id p2MMOLHu029325 for ; Tue, 22 Mar 2011 18:24:21 -0400 Received: from White (nrbg-4d075f1f.pool.mediaWays.net [77.7.95.31]) by mtaout-mb05.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 99C37E000089 for ; Tue, 22 Mar 2011 18:24:18 -0400 (EDT) Message-ID: <5EF725F38C184B7B8EF3B0D19B960C3C@White> From: "Markus Vester" To: References: <59F87B1BA5D04A2F98902CF94C38DB30@JimPC> <8CDB60EE4F8971C-1AD0-3512@webmail-m142.sysops.aol.com> Date: Tue, 22 Mar 2011 23:24:22 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 12.0.1606 X-MimeOLE: Produced By Microsoft MimeOLE V12.0.1606 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Re: Loop TX antennas at VLF? (minor correction) Content-Type: text/plain; charset="utf-8" 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-global-disposition: G x-aol-sid: 3039ac1d600d4d89220a1386 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Sorry, this should have said "0.07 milliohms at 9 kHz". 73, Markus From: Markus Vester Sent: Monday, March 21, 2011 7:42 PM To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: Loop TX antennas at VLF? ... For my small Maconi, I have measured an effective height of 9 m at LF, and my estimate is that this is reduced to 7 m at VLF due to increased shunt effects from nearby trees. Thus it would have a radiation resistance of 7 milliohms at 9 kHz. ...