Envelope-to: dave@picks.force9.co.uk Delivery-date: Tue, 31 Jan 2006 23:19:22 +0000 Received: by ptb-mxcore02.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1F44mN-0003TT-CX for dave@picks.force9.co.uk; Tue, 31 Jan 2006 23:19:21 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (PlusNet MXCore v2.00) id 1F44mN-0003TH-6z for dave@picks.force9.co.uk; Tue, 31 Jan 2006 23:19:19 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1F44ll-0006V9-AU for rs_out_1@blacksheep.org; Tue, 31 Jan 2006 23:18:41 +0000 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1F44lk-0006V0-Pd for rsgb_lf_group@blacksheep.org; Tue, 31 Jan 2006 23:18:40 +0000 Received: from rwcrmhc13.comcast.net ([204.127.192.83]) by relay2.thorcom.net with esmtp (Exim 4.51) id 1F45TG-0002KZ-A0 for rsgb_lf_group@blacksheep.org; Wed, 01 Feb 2006 00:03:40 +0000 Received: from rmailcenter19.comcast.net ([204.127.197.129]) by comcast.net (rwcrmhc13) with SMTP id <20060131231828m1300nl2t0e>; Tue, 31 Jan 2006 23:18:28 +0000 Received: from [24.91.21.104] by rmailcenter19.comcast.net; Tue, 31 Jan 2006 23:18:27 +0000 From: Warren K2ORS/WD2XGJ To: rsgb_lf_group@blacksheep.org, rsgb lf reflector Cc: LWCA LF Reflector Date: Tue, 31 Jan 2006 23:18:27 +0000 Message-Id: <013120062318.10463.43DFF04300098C09000028DF22069984990B97010D0A020E06979D0E03@comcast.net> X-Mailer: AT&T Message Center Version 1 (Aug 4 2005) X-Authenticated-Sender: bWFyeWphbmVib3lkQGNvbWNhc3QubmV0 Subject: Re: LF: XGJ 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-PN-SpamFiltered: by PlusNet MXCore (v2.00) Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Hello the list, I disassembled the toroidal transformer in the loop ATU and found the cores to be good. I will attempt to pick up some teflon insulated wire tomorrow and rebuild the transformer, if all goes well will be back on the air tomorrow evening. -- 73 Warren K2ORS/WD2XGJ FN42hi http://www.w4dex.com/wd2xgj.htm -------------- Original message ---------------------- From: k2ors@comcast.net (Warren K2ORS/WD2XGJ) > Hello the list, > > Many thanks for all the reports last night from Hartmut, Jean-Pierre (F5YG), > Juan, Gary, and Roelof (Hope I didn't miss anyone!) > > As many of you have noted the signal dropped off at 03:00 UTC. At 04:00 I > noticed XGJ was very weak on the W3EEE 'grabber'. I went downstairs to the radio > shack to investigate. The antenna current (measured at 50 ohms) was less than > 100 mA ! It should be approximately 5 Amps from the Decca PA. I checked the > Decca on a dummy load and it was ok. I tried the smaller transmitter and noticed > a very high SWR. I went out and looked at the ATU, flashlight in hand. The > secondary of the toroidal step down transformer had arced and burned through the > insulation. I believe that the very high humidity played a part in the breakdown > of the insulation. I will have a look at the transformer today and may be able > to repair it if the toroidal core is not damaged. I am hopeful that the core is > o.k. since impedance measurements showed no change and I was able to run the 250 > watt transmitter into the antenna with a low swr after a period of time (after > the tuner cooled down). > I will of course use better insulated wire for the high voltage! > > > > -- > 73 Warren K2ORS/WD2XGJ > FN42hi > http://www.w4dex.com/wd2xgj.htm >