Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.2 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS,STOX_REPLY_TYPE,STOX_REPLY_TYPE_WITHOUT_QUOTES, T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id v6OFuoJk019847 for ; Mon, 24 Jul 2017 17:56:51 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dZfe1-0003hv-7q for rs_out_1@blacksheep.org; Mon, 24 Jul 2017 16:51:41 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dZfe0-0003hm-TR for rsgb_lf_group@blacksheep.org; Mon, 24 Jul 2017 16:51:40 +0100 Received: from know-smtprelay-omc-10.server.virginmedia.net ([80.0.253.74]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.89) (envelope-from ) id 1dZfdy-0006yE-3R for rsgb_lf_group@blacksheep.org; Mon, 24 Jul 2017 16:51:39 +0100 Received: from ASUS ([82.21.241.77]) by know-smtprelay-10-imp with bizsmtp id ofrd1v00A1gtunm01frdX2; Mon, 24 Jul 2017 16:51:37 +0100 X-DKIM-Result: Domain=ntlworld.com Result=Signature OK X-Originating-IP: [82.21.241.77] X-Authenticated-User: X-Spam: 0 X-Authority: v=2.1 cv=SeoKDalu c=1 sm=1 tr=0 a=+we89o/nwg41pYryx2JXJA==:117 a=+we89o/nwg41pYryx2JXJA==:17 a=L9H7d07YOLsA:10 a=9cW_t1CCXrUA:10 a=s5jvgZ67dGcA:10 a=8nJEP1OIZ-IA:10 a=x7bEGLp0ZPQA:10 a=F3M5lZpKAAAA:8 a=pGLkceISAAAA:8 a=RS5OaSAj5mL1LpvZmi8A:9 a=wPNLvfGTeEIA:10 a=slCku8JSH3TyizEDQ3pD:22 a=6kGIvZw6iX1k4Y-7sg4_:22 Message-ID: <32133D4DCF774C11B521A7B47C385985@ASUS> From: To: References: <1091782271.20170724143346@gmail.com> <5975FA1E.8090400@posteo.de> <699365699.20170724155823@gmail.com> In-Reply-To: <699365699.20170724155823@gmail.com> Date: Mon, 24 Jul 2017 16:41:36 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3555.308 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3555.308 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ntlworld.com; s=meg.feb2017; t=1500911497; bh=9nZ4dfHbrD57klvMUZZUOCPRJU7duisfzLYdU4DUKBI=; h=From:To:References:In-Reply-To:Subject:Date; b=G2LSufM8zl/8VFekjRBYnE4734ag8f9tHRlu2Eb+mM6di7i+PNwOsUj6Nn4PliyPg UrnY5gAW1Pxva0QChXzY8Sd0AuazqWdW8kcFWd2pl9ktC1aQEe+cmir9rfqITf+9Y+ 3iCHsyNXPwINXbMjUP9iMJe0uPVxCj1iv+bUPF1zb9/sFrgpf1WEEwJ0PXZs/DBCBI 3tNRFmKNs90+z0qS8XPhyFJ5Zm+hCHckESTjFfJzdXw7pVl2v6QaWce/8PjYMTXrqK bFL3Ad6lRIb4huE6sYulsN9gY9IBr/OWuoh3S7iN2oQyQkkG50LRYK+w4GU1zJxxG+ lRZm49Z/OG6og== X-Scan-Signature: 0317e2ac8ed27149e57223a21580246d Subject: LF: Re: Antenna change over relay question 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 2.75 Status: RO X-Status: X-Keywords: X-UID: 12285 Hi Chris Well I guess my remarks do have a bearing on your question. Sorry to put the mockers on the idea, but you could test the switch before connecting the RX to it, that may at least ensure the switch can stand the stress. When the RX is connected!!!! I guess tts the risk. Can send you my switch details if you wish. 73 Ian G4GIR -----Original Message----- From: Chris Wilson Sent: Monday, July 24, 2017 3:58 PM To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: Antenna change over relay question Hello Ian, You have me worried now, as does Andy with his last post, the thought of putting a kilowatt into the RX antenna socket of my 590 is not a pleasant or cheap one... Hmmm. Monday, July 24, 2017, 3:40:38 PM, you wrote: > Hi Chris/Stefan > Loosely connected to your question, I wanted to switch my Inv L between > LF/MF Variometer/loading coils and HF Auto remote tuner remotely, i.e 120' > away from the shack. > Every relay I tried had insulation break down and contact arc over. Only > running 360 W at MF and 300 at LF. > My solution was to fabricate a 3 position Knife type switch operated via a > Servo motor to switch the antennae and a standard 20 Amp Rated relay for > the > RF inputs to the Tuner and Variometers. > No more insulation break down or arc over. The contacts are mounted on Old > Eddystone porcelain insulators. > I would be interested to know how the relay holds up with 1 kW at 136 kHz. > 73 > Ian G4GIR -- Best regards, Chris mailto:dead.fets@gmail.com