Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_MED,SPF_PASS, T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; Body=3 Fuz1=3 Fuz2=3 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 v6OF3kBr019718 for ; Mon, 24 Jul 2017 17:03:47 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dZeoX-0003L8-Gt for rs_out_1@blacksheep.org; Mon, 24 Jul 2017 15:58:29 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dZeoX-0003Kz-3V for rsgb_lf_group@blacksheep.org; Mon, 24 Jul 2017 15:58:29 +0100 Received: from mail-wr0-x22f.google.com ([2a00:1450:400c:c0c::22f]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1dZeoU-0006cN-AM for rsgb_lf_group@blacksheep.org; Mon, 24 Jul 2017 15:58:27 +0100 Received: by mail-wr0-x22f.google.com with SMTP id 12so107545756wrb.1 for ; Mon, 24 Jul 2017 07:58:25 -0700 (PDT) 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=20161025; h=date:from:message-id:to:subject:in-reply-to:references:mime-version :content-transfer-encoding; bh=GgssCZnMBQqYuQcLyVccmnyasCDKvUWUE6HCZQQbrFo=; b=PAZqufCC8Ug10wPbUQbKFG/WeG/8CiInD3ccOWYxfD4d/KPMe5zWfm3i0uu8Ib80vT zagXzOgikx+nNLYpiGURti1jXdDeN/G0g8MEQKlcUwYp7/KZ6TWIezoac162QhLvNKD1 HLf6nmUx9wuNFGvX1qtVgmkI4saoQI5fdXl0tiYoXmiWDWkWWXTGB52r+YR6toErGCwq V1kRrLoGcoyuAjPNPBGpL9bCyPsXjam7O/Gh0Hhq9Oj5QplrgCwzeh8sbBJjtsD1M3hq Axnjc/y5vqN2dzceas/iVfjT7wzVQtH4D6CxXZJ1KVmchroBqEUGS4WSYRTg4HEGElJZ 8cmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:message-id:to:subject:in-reply-to :references:mime-version:content-transfer-encoding; bh=GgssCZnMBQqYuQcLyVccmnyasCDKvUWUE6HCZQQbrFo=; b=D/UxDpKwTiaZEo5tNfB10Q2+yZA/eHr6ScffOef91ej4UBqieTjN6TrAWcx9onRZAV 8yfiSIjalcS9j/7+2XgLLbKwnQKqgQg50oXWuhDBtDU06LSQzKhp44EYfVL6bUtK/YBk 4EuqcUnuDC6MPZEungxphV3n10oj4E2LBZJI7ac28jDhWTrD4rcqSMwnG1bUUwZe2UHB W74s79lYz7+S+SgFFyywQk5sFTq8Z30Jef7eRkKf0/F6+jXzMP+T+1HC8RSLkASJazYB z0vueJ7yIiXh2oATZbblcvvmQ0eqE7mnJQKK5ymNzycUucNBKPWqNQe3yshcEAKHSI4I 1gWA== X-Gm-Message-State: AIVw110rbaV/R+kL4Re6ICac6xptbAHBGVQb7iH2GYkg5BZdnbfZfhic zrsox1Q0Mm1qe1Q3 X-Received: by 10.223.169.51 with SMTP id u48mr16927771wrc.109.1500908305086; Mon, 24 Jul 2017 07:58:25 -0700 (PDT) Received: from OfficeWin7.lan (82-70-254-222.dsl.in-addr.zen.co.uk. [82.70.254.222]) by smtp.gmail.com with ESMTPSA id 39sm17588072wrc.84.2017.07.24.07.58.24 for (version=TLS1 cipher=AES128-SHA bits=128/128); Mon, 24 Jul 2017 07:58:24 -0700 (PDT) Date: Mon, 24 Jul 2017 15:58:23 +0100 From: Chris Wilson X-Priority: 3 (Normal) Message-ID: <699365699.20170724155823@gmail.com> To: rsgb_lf_group@blacksheep.org In-Reply-To: References: <1091782271.20170724143346@gmail.com> <5975FA1E.8090400@posteo.de> MIME-Version: 1.0 X-Scan-Signature: a6b6ffaf48fdddf1ed5c25dc4bf03ee1 Subject: Re: LF: Re: Antenna change over relay question 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 2.75 Status: RO X-Status: X-Keywords: X-UID: 12282 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