Return-Path: Received: from rly-me08.mx.aol.com (rly-me08.mail.aol.com [172.20.83.42]) by air-me07.mail.aol.com (v121_r4.4) with ESMTP id MAILINME073-9d3495d3ff01; Thu, 01 Jan 2009 17:13:17 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-me08.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINME087-9d3495d3ff01; Thu, 01 Jan 2009 17:13:08 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LIVmf-0007UN-5y for rs_out_1@blacksheep.org; Thu, 01 Jan 2009 22:12:53 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LIVme-0007UE-QB for rsgb_lf_group@blacksheep.org; Thu, 01 Jan 2009 22:12:52 +0000 Received: from imo-m20.mx.aol.com ([64.12.137.1]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LIVma-0005A4-V5 for rsgb_lf_group@blacksheep.org; Thu, 01 Jan 2009 22:12:52 +0000 Received: from MarkusVester@aol.com by imo-m20.mx.aol.com (mail_out_v39.1.) id l.ceb.4d6847e6 (34983) for ; Thu, 1 Jan 2009 17:12:37 -0500 (EST) Received: from Black (g229166121.adsl.alicedsl.de [92.229.166.121]) by cia-da08.mx.aol.com (v121_r5.5) with ESMTP id MAILCIADA088-88a7495d3fd3375; Thu, 01 Jan 2009 17:12:36 -0500 Message-ID: <775310DAF69C464DB828117B1D6D2E15@Black> From: "Markus Vester" To: References: <285F98C95F064AA8B5B6C559814191EC@ns94d01ae4d850> <495BC771.8080702@online.fr> <495D0D23.8050705@online.fr> In-Reply-To: <495D0D23.8050705@online.fr> Date: Thu, 1 Jan 2009 23:12:34 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6000.16480 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6000.16669 X-Spam-Flag:NO X-Karma: 0: X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Re: 137.750 qrss3 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.1 required=5.0 tests=MISSING_OUTLOOK_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-IP: 193.82.116.20 Hi Jean-Pierre, thanks for the report! I was trying to locate an intermittent fault in the antenna system. Most times, I can go up to my full 200 W, giving 3.5 A (16 kV rms) without problems. But sporadically already above a threshold of 1 A (4.5 kV rms), some sort of partial discharge starts to happen, resulting in increased and erratically variable resistance and also slightly increased capacitance. It is accompanied by strong noise emissions in the FM broadcast band (which had been hardly noticable during several former instances of visible corona). With a piece of wire as a capacitive probe on a scope, a distinct and fast "ringing" is present on each rising edge of the carrier sinusoid. I have tried to look for visual corona in the dark and listen for the telltale sharp hiss of voltage breakdown, but with no definite findings up to now. At the moment all seems ok - Murphy's playing hide and seek... Best wishes for 2009, de Markus, DF6NM ----- Original Message ----- From: ""Jean-Pierre Méré (F1AFJ)"" To: Sent: Thursday, January 01, 2009 7:36 PM Subject: LF: 137.750 qrss3 > Hello Markus (NM) > Good copy of your signal test now ! > 73 HNY Jean-Pierre f1afj