Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-md03.r1000.mx.aol.com (Internet Inbound) with ESMTP id CE1393800008F; Sat, 30 Jun 2012 09:27:29 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Skxgz-0006ZX-0n for rs_out_1@blacksheep.org; Sat, 30 Jun 2012 14:26:29 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Skxgy-0006ZO-If for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2012 14:26:28 +0100 Received: from mailout07.t-online.de ([194.25.134.83]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1Skxgw-0005ut-LU for rsgb_lf_group@blacksheep.org; Sat, 30 Jun 2012 14:26:27 +0100 Received: from fwd01.aul.t-online.de (fwd01.aul.t-online.de ) by mailout07.t-online.de with smtp id 1Skxgv-0008QO-GK; Sat, 30 Jun 2012 15:26:25 +0200 Received: from standard9dmup1 (rXabTGZdYh1P3Y03h9My6BuRBzdZqWwqS2NNsJeZTgKMdwjbA4cdyYYL75ef+jJgnu@[84.147.188.72]) by fwd01.t-online.de with esmtp id 1Skxgm-1ayVPs0; Sat, 30 Jun 2012 15:26:16 +0200 Message-ID: <00942B895A8F4CD3999DDE680DBE16CE@standard9dmup1> From: "Walter Staubach" To: References: <4FEEF3ED.4070503@iup.uni-heidelberg.de> Date: Sat, 30 Jun 2012 15:26:26 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 X-ID: rXabTGZdYh1P3Y03h9My6BuRBzdZqWwqS2NNsJeZTgKMdwjbA4cdyYYL75ef+jJgnu X-TOI-MSGID: 3cb7729f-6f47-407b-93c1-7ccf6b48d10a X-Spam-Score: -0.0 (/) 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: Stefan, tnx fer info and ok abt ur "ground antenna". Here QRN low at this moment. We should give the dipole (really? don't know) a chance, so from time to time will listen. I am just testing a simple way to put up fiber glass masts for a MF-antenne. Our Club intends to have a small fieldday at 29.7.12 - only fer MF. 73 Walter [...] Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [194.25.134.83 listed in list.dnswl.org] -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-Scan-Signature: 4b5b5ebe37a4c4f430f59bc35c1947b0 Subject: LF: Re: An asymmetric feeded full wave dipole for the 630m band Content-Type: text/plain; format=flowed; charset="ISO-8859-15"; reply-type=response Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.6 required=5.0 tests=FORGED_MUA_OUTLOOK 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-SCORE: 0:2:376281184:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d60574feefec11f74 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Stefan, tnx fer info and ok abt ur "ground antenna". Here QRN low at this moment. We should give the dipole (really? don't know) a chance, so from time to time will listen. I am just testing a simple way to put up fiber glass masts for a MF-antenne. Our Club intends to have a small fieldday at 29.7.12 - only fer MF. 73 Walter ----- Original Message ----- From: "Stefan Schäfer" To: Sent: Saturday, June 30, 2012 2:41 PM Subject: LF: An asymmetric feeded full wave dipole for the 630m band MF, Another thing. Right now it is 32 °C here. Best place it to stay on the beach or on the top of a hill in the forest. Today i choose the forest. Accidentally there is my 700m (ish) long earth antenna which has an average height above ground of 8m. Today i want to use it as a dipole for the 630m band. The feed point is somewhere in the middle but not exactly known. What will the efficiency and radiation pattern be? Is it a dipole or what? EZNEC says it will have 10 Ohm Z=R at resonance (Cu losses + "typical" ground losses). The WX forcast says there will be much QRN in the evening, anyway. Maybe someone can listen from time to time on 476.5 kHz? I will listen on the band (+ 500 kHz +-) too and maybe a QSO is possible. Who knows... If the antenna behaves as a dipole it should radiate E/W, so good chances for UK, PA and DF6NM, DJ2LF... I'll start now and may be "QRV" in 2 hours or so. Here, the first time my PA will operate in /p. Nice that it is smaller than a VHS video cassette and allows to generate QRP at high efficiency! 73, CU, Stefan/DK7FC