Return-Path: <owner-rsgb_lf_group@blacksheep.org> X-Spam-DCC: paranoid 1290; Body=3 Fuz1=3 Fuz2=3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL 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 tAJKCSw4007984 for <sq5bpf@lipkowski.org>; Thu, 19 Nov 2015 21:12:28 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZzVWO-0005DK-Rj for rs_out_1@blacksheep.org; Thu, 19 Nov 2015 20:09:32 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZzVWO-0005D9-JI for rsgb_lf_group@blacksheep.org; Thu, 19 Nov 2015 20:09:32 +0000 Received: from smtpout1.wanadoo.co.uk ([80.12.242.29] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from <g8fzk@g8fzk.fsnet.co.uk>) id 1ZzVVK-0000tc-Uz for rsgb_lf_group@blacksheep.org; Thu, 19 Nov 2015 20:09:31 +0000 Received: from AGB ([95.150.81.190]) by mwinf5d12 with ME id jY8C1r00946NVRr03Y8Ctv; Thu, 19 Nov 2015 21:08:12 +0100 X-ME-Helo: AGB X-ME-Date: Thu, 19 Nov 2015 21:08:12 +0100 X-ME-IP: 95.150.81.190 Message-ID: <9A61F2B2E34C4D3DADDBC99E102D23E1@AGB> From: "Graham" <g8fzk@g8fzk.fsnet.co.uk> To: <rsgb_lf_group@blacksheep.org> References: <1729369062.20151119120030@chriswilson.tv> <1C735FA296594DF897C48882843B0EB7@gnat> <CAA8k23QJA9cywxQHScDv8egMpCLqope-MgEv7Um3D5SG4tGS=w@mail.gmail.com> <564DD9F0.3020005@posteo.de> <564DDE76.6010403@vsas.de> <1242998235.20151119145225@chriswilson.tv>,<564DF235.90008@posteo.de> <7E7DFBB4D102A04DB5ADC88D66628A4A44476711@ICTS-S-MBX1.luna.kuleuven.be> <385623502.20151119194008@chriswilson.tv> In-Reply-To: <385623502.20151119194008@chriswilson.tv> Date: Thu, 19 Nov 2015 20:08:12 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Scan-Signature: c0336009bd9bab526ca27d297ea7579a Subject: Re: Re[2]: LF: Re: Antenna relays Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original 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: 5202 Simpler to string something up for HF , away from the loop Chris ? 73-G, -------------------------------------------------- From: "Chris Wilson" <chris@chriswilson.tv> Sent: Thursday, November 19, 2015 7:40 PM To: "Rik Strobbe" <rsgb_lf_group@blacksheep.org> Subject: Re[2]: LF: Re: Antenna relays > 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 > >