Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id wAOKLIw5023825 for ; Sat, 24 Nov 2018 21:21:24 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gQeNh-00074q-Cw for rs_out_1@blacksheep.org; Sat, 24 Nov 2018 20:18:21 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gQeNh-00074h-3t for rsgb_lf_group@blacksheep.org; Sat, 24 Nov 2018 20:18:21 +0000 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gQeNf-0005RS-IW for rsgb_lf_group@blacksheep.org; Sat, 24 Nov 2018 20:18:20 +0000 Received: from submission (posteo.de [89.146.220.130]) by mout01.posteo.de (Postfix) with ESMTPS id 5003116005D for ; Sat, 24 Nov 2018 21:18:16 +0100 (CET) X-DKIM-Result: Domain=posteo.de Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.de; s=2017; t=1543090696; bh=lr/5nWZnyvnNQantMDzjph35dj9dYPvM2uqYX3Py4Lc=; h=Date:From:To:Subject:From; b=oAVLjWkz5GzEgG8w7ivpOasxbnO2OrgmHf73fkUpThgYrllqncW3asAqtDwhndU3C Rt02jE3qYjeVse7Ud5XyiTt88iby/WPVOZ7i/ruWvb8/FHZbSqEGd6+qlfGfXh/ESh nic6UWBwgwsUmEF4J/SgKoKh10kk3HqSjRUZ4L4LvW6atlTD8iUyha4HM3OKRwl2SB sstGRjjnQC3QHBtPC7JR7ms5VZEB5+Q2ObHV6lMkAEEG86SKTtB9DT+4AIyj73NvB6 Utb/xmPSnH76PuSgBZKqEJ5jdej3ssHDYXhUfAzrcWpWpGLEC9EdAPSthNj+2iMw+v p7poQS9vHrkog== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 432Pd352Dwz6tmG for ; Sat, 24 Nov 2018 21:18:15 +0100 (CET) Message-ID: <5BF9B207.5080105@posteo.de> Date: Sat, 24 Nov 2018 21:18:15 +0100 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <1050898420.5270936.1543008571489.ref@mail.yahoo.com> <1050898420.5270936.1543008571489@mail.yahoo.com> <5BF9776F.2020802@posteo.de> <60316d81-c382-d148-4f66-655927b999aa@n1bug.com> <5BF9A521.5010808@posteo.de> In-Reply-To: X-Spam-Score: -2.3 (--) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Am 24.11.2018 20:49, schrieb N1BUG: > So what if I could make a dummy load with the same R as that of my > antenna / earth and do the test again? > Hmmmmm, this should not be necessary when the xfmr s [...] Content analysis details: (-2.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [185.67.36.65 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 5c335215f1b3de26d890ee84d49616ce Subject: Re: LF: No 2200m TX tonight Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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 Am 24.11.2018 20:49, schrieb N1BUG: > So what if I could make a dummy load with the same R as that of my > antenna / earth and do the test again? > Hmmmmm, this should not be necessary when the xfmr stays cool in any way. Could it be a defective isolator which becomes conducting after some time. If you say the the phase is moving to leading voltage, i.e. inductive, then something seems to reduce the capacity or is switched in parallel to it. Maybe something becomes conducting and detunes the antenna, still having a high voltage so that power can be dissipated and keep the fault? > BUT... I found ONE thing that gets warm. It is that bottom-most turn > on the loading coil. The one that is a shorted turn because of the > way the tap is connected. I do not dare put my hand in there when > the transmitter is running! It takes me about 45 seconds after > shutting down the transmittter to make SURE the TX is disabled, go > outside and feel the coil. At that point, with air temperature being > about 0C today, that bottom turn (or two) is still noticeably warm. > The rest of the coil feels cold. > > I have just brought the big coil inside for inspection and a > modification to eliminate the shorted turn at the bottom. > Oh yes, of course avoid shorted turns. If i remember correctly, a shorted turn will reduce the inductivity (more than just leaving the complete turn out of the coil). And then, if it gets hot, the induced current will drop, so the inductivity becomes larger again. So maybe you found it and will be on air tonite, right? ;-) 73, Stefan