Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-di03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 8132038000082; Wed, 23 Jan 2013 15:44:25 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Ty79t-0006Ay-2N for rs_out_1@blacksheep.org; Wed, 23 Jan 2013 20:42:57 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Ty79s-0006Ap-5X for rsgb_lf_group@blacksheep.org; Wed, 23 Jan 2013 20:42:56 +0000 Received: from mail-ie0-f169.google.com ([209.85.223.169]) by relay1.thorcom.net with esmtps (TLSv1:RC4-SHA:128) (Exim 4.77) (envelope-from ) id 1Ty79p-0003hc-W2 for rsgb_lf_group@blacksheep.org; Wed, 23 Jan 2013 20:42:55 +0000 Received: by mail-ie0-f169.google.com with SMTP id c14so14745819ieb.0 for ; Wed, 23 Jan 2013 12:42:31 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:x-received:in-reply-to:references:date:message-id :subject:from:to:content-type; bh=85lYpIJ1JaAIQ3ZgHisbsWmdA+tSfLNuHMGMx6zt3II=; b=c17A455sOIydCvWROBNF94cthsvKJtoumJGMgvKrtLLMFRn/Nn6Djbu2hXMxS51UHY 7r61jo3Ez93yWaXmZPUDm8g2IM5YOgRH5I1sUlGj6J5VTAZx37DksPYIuAV38coNYFOX MTKlmM94v2tJZailQqlTJ8NoE7kBkVlGavZtt+L2DshPEGVgdLo7IFZiCvBEKhI+Xpc7 jZi/ziHSZa0NcGMGXqQUXGb8XVf5HUgRWQWltDvMPMpJq+DzHoZxZHoCjxCyGAiQL/dl Qj8rdKxitA3Aszv+danY/MkrSyMN8jZpNVv1fnYl1XG1M12f/xWlCnP23Tk+j7tYR4G7 qavQ== MIME-Version: 1.0 X-Received: by 10.50.160.165 with SMTP id xl5mr2277898igb.54.1358973751425; Wed, 23 Jan 2013 12:42:31 -0800 (PST) Received: by 10.231.149.195 with HTTP; Wed, 23 Jan 2013 12:42:31 -0800 (PST) In-Reply-To: <7E7DFBB4D102A04DB5ADC88D66628A4A0FB6B9CC@ICTS-S-MBX5.luna.kuleuven.be> References: <7E7DFBB4D102A04DB5ADC88D66628A4A0FB6B9CC@ICTS-S-MBX5.luna.kuleuven.be> Date: Thu, 24 Jan 2013 07:42:31 +1100 Message-ID: From: Dimitrios Tsifakis To: rsgb_lf_group@blacksheep.org 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: Hi Rik, I will try an unterminated dipole next. The weather has been really hot in the past few weeks here and the ground is probably drier than usual. My block of land is a bit hilly, so in fact it will be an inverted-V dipole rather than a traditional one. This will be interesting for sure. [...] 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 [209.85.223.169 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (dtsifakis[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 6ffbd2c9950b634d6cc91f9565b01a8b Subject: Re: LF: RE: earth antenna test Content-Type: text/plain; charset=ISO-8859-1 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-global-disposition: G X-AOL-SCOLL-AUTHENTICATION: mtain-di03.r1000.mx.aol.com ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1da60751004ba84a44 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi Rik, I will try an unterminated dipole next. The weather has been really hot in the past few weeks here and the ground is probably drier than usual. My block of land is a bit hilly, so in fact it will be an inverted-V dipole rather than a traditional one. This will be interesting for sure. 73, Dimitris VK1SV 2013/1/23 Rik Strobbe : > 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. > > 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