Return-Path: X-Spam-DCC: paranoid 1290; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,SUBJ_RE_NUM autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id tAJJix26007852 for ; Thu, 19 Nov 2015 20:44:59 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZzV5G-0004ea-Df for rs_out_1@blacksheep.org; Thu, 19 Nov 2015 19:41:30 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZzV5G-0004eR-5C for rsgb_lf_group@blacksheep.org; Thu, 19 Nov 2015 19:41:30 +0000 Received: from smarthost01c.mail.zen.net.uk ([212.23.1.5]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1ZzV4B-0000hV-Vx for rsgb_lf_group@blacksheep.org; Thu, 19 Nov 2015 19:41:29 +0000 Received: from [82.70.254.222] (helo=OfficeWin7.lan) by smarthost01c.mail.zen.net.uk with esmtp (Exim 4.80) (envelope-from ) id 1ZzV3x-0007Az-3A for rsgb_lf_group@blacksheep.org; Thu, 19 Nov 2015 19:40:09 +0000 Date: Thu, 19 Nov 2015 19:40:08 +0000 From: Chris Wilson Organization: Gatesgarth Developments X-Priority: 3 (Normal) Message-ID: <385623502.20151119194008@chriswilson.tv> To: Rik Strobbe In-Reply-To: <7E7DFBB4D102A04DB5ADC88D66628A4A44476711@ICTS-S-MBX1.luna.kuleuven.be> References: <1729369062.20151119120030@chriswilson.tv> <1C735FA296594DF897C48882843B0EB7@gnat> <564DD9F0.3020005@posteo.de> <564DDE76.6010403@vsas.de> <1242998235.20151119145225@chriswilson.tv>,<564DF235.90008@posteo.de> <7E7DFBB4D102A04DB5ADC88D66628A4A44476711@ICTS-S-MBX1.luna.kuleuven.be> MIME-Version: 1.0 X-Originating-smarthost01c-IP: [82.70.254.222] X-Scan-Signature: 086f3faad0220c9ae57a7913e711a86d Subject: Re[2]: LF: Re: Antenna relays Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 5197 Hello Rik, Thursday, November 19, 2015 Whilst you experts argue the technical niceties of the challenge, let me ask what might be a simple question to you guys. What is the minimum number of two contact vac relays I would need to go from strapped ladder line to top of loading coil, to unstrapped ladder line, disconnected from the top of the coil, and now connected to my coaxial feed line, presumably itself disconnected from ground and the bottom of the loading coil? It seems a lot would be needed to me.... :( Thanks! I can see me leaving wet weather gear by the front door and doing this manually! > Hello Stefan, > I am not sure a (lossless) capacitor in parallel with the coil will lower the antenna efficiency. > I would assume that it will affect the antenna impedance as seen > from the TX, but will not change the ratio Rrad/Rloss (what > determines the antenna effeciency). > 73, Rik ON7YD -- Best regards, Chris 2E0ILY mailto:chris@chriswilson.tv