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 w13KbaxL007936 for ; Sat, 3 Feb 2018 21:37:39 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ei4VA-0008LP-9b for rs_out_1@blacksheep.org; Sat, 03 Feb 2018 20:33:32 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ei4V9-0008LG-Np for rsgb_lf_group@blacksheep.org; Sat, 03 Feb 2018 20:33:31 +0000 Received: from lethe.lipkowski.org ([151.80.54.59] helo=lipkowski.org) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1ei4V7-0000Di-3P for rsgb_lf_group@blacksheep.org; Sat, 03 Feb 2018 20:33:30 +0000 Received: from mailn.lipkowski.org (localhost [127.0.0.1]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id w13KaGbb003084 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Sat, 3 Feb 2018 21:36:16 +0100 Received: from localhost (sq5bpf@localhost) by mailn.lipkowski.org (8.14.4/8.14.4/Submit) with ESMTP id w13KaF1v003080 for ; Sat, 3 Feb 2018 21:36:15 +0100 X-Authentication-Warning: mailn.lipkowski.org: sq5bpf owned process doing -bs Date: Sat, 3 Feb 2018 21:36:15 +0100 (CET) From: Jacek Lipkowski To: "rsgb_lf_group@blacksheep.org" In-Reply-To: <579355A36AEE9D4FA555C45D556003AB9AB4958F@servigilant.vigilant.local> Message-ID: References: <579355A36AEE9D4FA555C45D556003AB9AB485D3@servigilant.vigilant.local> <5A7377F7.4050802@posteo.de> <017101d39bab$2f0e3710$8d2aa530$@comcast.net> <23159F1ED5BD49AD9654CE5685AFACF6@Clemens0811>,<5A75EA08.9090009@posteo.de> <579355A36AEE9D4FA555C45D556003AB9AB4958F@servigilant.vigilant.local> User-Agent: Alpine 2.11 (DEB 23 2013-08-11) MIME-Version: 1.0 X-Spam-Score-sq5bpf: -2.9 () ALL_TRUSTED,BAYES_00 X-Scanned-By: MIMEDefang 2.75 on 10.1.3.10 X-Spam-Score: -0.0 (/) 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 the administrator of that system for details. Content preview: On Sat, 3 Feb 2018, VIGILANT Luis Fernández wrote: > Jacek, you mentioned what I was midnight oiling here > " If you want some semi-DX in the H-field, then try coupling into some long > conductors (pipes, power lines, railway tracks etc)" [...] Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: f38d515a9cad1e977fcfe251941a8120 Subject: Re: LF: VLF Small magnetic antenna for Tx Content-Type: MULTIPART/MIXED; BOUNDARY="17435139-1909422419-1517690175=:4158" 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=TO_ADDRESS_EQ_REAL 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 This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --17435139-1909422419-1517690175=:4158 Content-Type: TEXT/PLAIN; charset=utf-8; format=flowed Content-Transfer-Encoding: 8BIT On Sat, 3 Feb 2018, VIGILANT Luis Fernández wrote: > Jacek, you mentioned what I was midnight oiling here > " If you want some semi-DX in the H-field, then try coupling into some long > conductors (pipes, power lines, railway tracks etc)" And i forgot phone lines :) Actually there has been a 700m phone line, that was well grounded at the phone exchange (old exchange, no local modules were used, so the wire went all the way there). This makes a nice ground dipole when a transmitter is placed between the local ground and the grounded wire from the phone line. Putting abt. 30mA at 8.97kHz (this was when 9kHz was the ITU limit) gave a very nice signal 600-700m from the phone line. > What about coupling the loop to my 90m vertical ? > Adding another transformer from loop to vertical or just winding some coils of the vertical over the > small loop ring would work ? No, because the amount of current induced in the mast would be very small. BTW i wish i had a 90m vertical. VY 73 Jacek / SQ5BPF --17435139-1909422419-1517690175=:4158--