Return-Path: Received: from mtain-mp03.r1000.mx.aol.com (mtain-mp03.r1000.mx.aol.com [172.29.193.71]) by air-db05.mail.aol.com (v129.10) with ESMTP id MAILINDB052-861f4ddd672f16e; Wed, 25 May 2011 16:31:43 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mp03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 20BA9380000D7; Wed, 25 May 2011 16:31:40 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QPKip-0000pY-W7 for rs_out_1@blacksheep.org; Wed, 25 May 2011 21:30:27 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QPKip-0000pL-2s for rsgb_lf_group@blacksheep.org; Wed, 25 May 2011 21:30:27 +0100 Received: from smtp2.mail.ru ([94.100.176.130]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QPKim-000668-Do for rsgb_lf_group@blacksheep.org; Wed, 25 May 2011 21:30:27 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mail.ru; s=mail; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Date:Subject:References:To:From:Message-ID; bh=MfuwzaKk5nNrk1gL5KMinWLz1tI6yg4tdFpahGEq1xw=; b=te9DBH2KUmswGK83zzYd2iRFJ+hILQKy8kQOnc87IE50pIYJrrvQA7UfVtg+fr9ufkG32fAa1YydzLCBDonWLH1MASnhHQR4nbV1PWsJC43CDbIiOQC9PHS0mrQSAJAn; Received: from [79.98.8.29] (port=39725 helo=EFREMOV) by smtp2.mail.ru with asmtp id 1QPKig-0003uX-00 for rsgb_lf_group@blacksheep.org; Thu, 26 May 2011 00:30:18 +0400 X-Nat-Received: 172.16.10.160 Message-ID: <005301cc1b1a$8f6062a0$8cd9160a@EFREMOV> From: "rn3agc" To: References: <4DDC2383.1080000@iup.uni-heidelberg.de> <000801cc1a5f$50760970$8cd9160a@EFREMOV> <1QP1Ue-15FYa80@fwd00.t-online.de> Date: Thu, 26 May 2011 00:28:04 +0400 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Spam: Not detected X-Mras: Ok X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Re: RN3AGC on aerial ground Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original 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 x-aol-global-disposition: G X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m208.1 ; domain : mail.ru DKIM : pass x-aol-sid: 3039ac1dc1474ddd672c66e3 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hello Ha-Jo, Thank you. I will experiment. 73 Andrey > Dear all, > > the different efficiency of a typical radio amateur LF aerial between > winter and summer is due to the frozen ground in winter, causing lower > ground loss. Therefore I have employed a matching transformer between > feeder cable and the aerial feed point using three taps on the > secondary. > > This has already been confirmed earlier by Swiss LF operators in the > "good old CW period" around 1998-2000. But I also remember that british > LF operators had problems to confirm this, possibly because of less and > weaker freeze periods in wintertime in their country. > > This transformer has also the task to separate the safety ground in the > shack and the outside aerial ground, otherwise I have noticed that > plugging and unplugging equipment in the shack may change aerial > tuning. > > HW? > > 73 Ha-Jo, DJ1ZB > > > "rn3agc" schrieb: >> Hi Stefan, >> The aerial doesn't work in the summer... >> In the winter on PA 24V 12A, now only 7A with 32V. >> >> Frequency of a synthesizer "jumps", this is something new.. >> >> 73 >> Andrey >> >> >> > ...is currently transmitting DFCW-60 at 137.7775 kHz, visible in YO >> > http://qsl.net/4x1rf/yo/lfgrabber.htm >> > >> > Maybe the signal comes up here in west EU later... >> > >> > 73, Stefan/DK7FC >> > >> >> > >