Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-de03.r1000.mx.aol.com (Internet Inbound) with ESMTP id E7704380000C4; Mon, 10 Oct 2011 18:55:36 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RDOjp-0000h7-4X for rs_out_1@blacksheep.org; Mon, 10 Oct 2011 23:54:25 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RDOjo-0000gy-LL for rsgb_lf_group@blacksheep.org; Mon, 10 Oct 2011 23:54:24 +0100 Received: from nina.ucs.mun.ca ([134.153.232.76]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RDOjm-0006tD-3D for rsgb_lf_group@blacksheep.org; Mon, 10 Oct 2011 23:54:24 +0100 Received: from plato.ucs.mun.ca (plato.ucs.mun.ca [134.153.232.153]) by nina.ucs.mun.ca (8.13.1/8.13.1) with ESMTP id p9AMsECU015916 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 10 Oct 2011 20:24:14 -0230 Date: Mon, 10 Oct 2011 20:24:14 -0230 (NDT) From: jcraig@mun.ca X-X-Sender: jcraig@plato.ucs.mun.ca To: rsgb_lf_group@blacksheep.org In-Reply-To: <4E934A40.9040204@gmx.de> Message-ID: References: <4E91694C.8060900@orange.fr> <4E9169AD.8090609@wanadoo.fr> <4E918C0E.30401@freenet.de> <4E918FF1.1010407@iup.uni-heidelberg.de> <1318166502.15085.YahooMailNeo@web28106.mail.ukl.yahoo.com> <1849736542-1318171189-cardhu_decombobulator_blackberry.rim.net-208700020-@b1.c11.bise7.blackberry> <4E920BBA.9040200@iup.uni-heidelberg.de> <4E934A40.9040204@gmx.de> MIME-Version: 1.0 X-MUN-Disclaimer: http://www.mun.ca/cc/policies/elect_communications_disclaimer_2011.php X-Spam-Score: 0.6 (/) X-Spam-Report: autolearn=disabled,NO_REAL_NAME=0.55 Subject: Re: LF: VX9MRC QRV 507.77 kHz/ Arcing relays &c. Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME 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: 0:2:512410848:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d40cb4e9377e83507 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hello Hartmut, Group. Good to hear from you again, Hartmut. Thank-you for the report. The beacon is on again, but there was some trouble: to use the tower on 160m the 500 kHz tuning coil (0.2 mH) is shorted by a relay. The N.O. contacts on this relay arced over. Perhaps a high voltage (vacuum) relay would help? This problem will be much worse on 137.777 kHz with the higher voltage. I have some spiral wound 4mm (Decca) litz to make up the 3 mH for that project. (The spiral winding was inspired by G3NYK's experiments with tuning coils on his web page.) 73 Joe On Mon, 10 Oct 2011, Hartmut Wolff wrote: > Am 2011-10-09 23:50, wrote jcraig@mun.ca: >> Dear Group, >> Reports on the 8 WPM CW beacon will be appreciated! >> 73 >> Joe VO1NA > > Attached a screenshot of the 8wpm signal. The signal came up at about 23:20 > and faded out at about 7:35. The strongest part was between 04:00-06:00 UTC > -- > 73 > Hartmut > www.h-wolff.de > Locator: JO52hp > This electronic communication is governed by the terms and conditions at http://www.mun.ca/cc/policies/electronic_communications_disclaimer_2011.php