Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mk05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 1DD4E3800009E; Wed, 23 Jan 2013 02:49:51 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Txv4m-0003XQ-PL for rs_out_1@blacksheep.org; Wed, 23 Jan 2013 07:48:52 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Txv4m-0003XH-6U for rsgb_lf_group@blacksheep.org; Wed, 23 Jan 2013 07:48:52 +0000 Received: from rhcavuit01.kulnet.kuleuven.be ([134.58.240.129] helo=cavuit01.kulnet.kuleuven.be) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1Txv4j-0000zr-HF for rsgb_lf_group@blacksheep.org; Wed, 23 Jan 2013 07:48:51 +0000 X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be X-KULeuven-Scanned: Found to be clean X-KULeuven-ID: 0C9361380B7.A24F3 X-KULeuven-Information: Katholieke Universiteit Leuven Received: from icts-p-smtps-1.cc.kuleuven.be (icts-p-smtps-1e.kulnet.kuleuven.be [134.58.240.33]) by cavuit01.kulnet.kuleuven.be (Postfix) with ESMTP id 0C9361380B7 for ; Wed, 23 Jan 2013 08:48:27 +0100 (CET) Received: from ICTS-S-HUB4.luna.kuleuven.be (icts-s-hub4.luna.kuleuven.be [10.112.9.18]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by icts-p-smtps-1.cc.kuleuven.be (Postfix) with ESMTPS id 16A37404D for ; Wed, 23 Jan 2013 08:48:25 +0100 (CET) Received: from ICTS-S-MBX5.luna.kuleuven.be ([fe80::312b:f3bc:9c4:4ebb]) by ICTS-S-HUB4.luna.kuleuven.be ([fe80::c11b:83f0:c46c:c366%26]) with mapi id 14.02.0309.002; Wed, 23 Jan 2013 08:48:24 +0100 X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe To: "rsgb_lf_group@blacksheep.org" Thread-Topic: earth antenna test Thread-Index: AQHN+SR+ojsM3Be4Xkqx2kDXlpJn3ZhWh/9z Date: Wed, 23 Jan 2013 07:48:24 +0000 Message-ID: <7E7DFBB4D102A04DB5ADC88D66628A4A0FB6B9CC@ICTS-S-MBX5.luna.kuleuven.be> References: In-Reply-To: Accept-Language: nl-BE, en-US Content-Language: nl-BE X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.112.13.12] MIME-Version: 1.0 X-HELO-Warning: Remote host 134.58.240.129 (rhcavuit01.kulnet.kuleuven.be) used invalid HELO/EHLO cavuit01.kulnet.kuleuven.be - verification failed X-Spam-Score: -0.7 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hello Dimitris, very interesting, in particular the comparison between the terminated and unterminated wires. The fact that an unterminated wire works brings up another experiment: how would a dipole placed on the ground perform? On 475kHz a half wave length would be 316m (2x158m), the physical length probably 300m or less. [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [134.58.240.129 listed in list.dnswl.org] -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: f62c7cf8eeb8e5a327b71719e9bffff1 Subject: LF: RE: earth antenna test Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable 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=TO_ADDRESS_EQ_REAL 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: 3039ac1d618950ff961f26ae X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hello Dimitris, very interesting, in particular the comparison between the terminated and u= nterminated wires. The fact that an unterminated wire works brings up another experiment: how = would a dipole placed on the ground perform? On 475kHz a half wave length would be 316m (2x158m), the physical length pr= obably 300m or less. 73, Rik ON7YD - OR7T ________________________________________ Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org= ] namens Dimitrios Tsifakis [dtsifakis@gmail.com] Verzonden: woensdag 23 januari 2013 5:42 To: rsgb_lf_group@blacksheep.org Onderwerp: LF: earth antenna test Hello group, here is a quick test I did on 475 kHz, using some wires laying on the ground. I was really impressed by the signal strength but capturing the signal from my AA-30 antenna analyser surely takes the cake :-) http://people.physics.anu.edu.au/~dxt103/136/earth/6/ Happy to hear your comments on this test. 73, Dimitris VK1SV=