Return-Path: Received: (qmail 81128 invoked from network); 20 Apr 2004 19:51:43 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore03.plus.net with SMTP; 20 Apr 2004 19:51:43 -0000 Received: (qmail 56088 invoked from network); 20 Apr 2004 19:51:42 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 20 Apr 2004 19:51:41 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BG1HR-000EFR-30 for dave@picks.force9.co.uk; Tue, 20 Apr 2004 19:51:41 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BG1Gr-0000J0-Ot for rs_out_1@blacksheep.org; Tue, 20 Apr 2004 20:51:05 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BG1Gr-0000Ir-AJ for rsgb_lf_group@blacksheep.org; Tue, 20 Apr 2004 20:51:05 +0100 Received: from postbode01.zonnet.nl ([62.58.50.88]) by relay.salmark.net with esmtp (Exim 4.24) id 1BG1Gj-00073m-Jc for rsgb_lf_group@blacksheep.org; Tue, 20 Apr 2004 20:50:57 +0100 Received: (qmail 6710 invoked by uid 10); 20 Apr 2004 19:50:26 -0000 Received: (vexira-qq 06253-5DA8F147 invoked from network) 20 Apr 2004 21:50:22 +0200 X-Fake-Domain: unknown Received: from unknown (HELO ibm) ([62.59.191.124]) (envelope-sender ) by postbode01.zonnet.nl (qmail-ldap-1.03) with SMTP for < >; 20 Apr 2004 19:50:22 -0000 X-Bad-Message-ID: no DNS (ibm) Message-ID: <002601c4270f$6559e780$2102000a@ibm> From: "Dick" To: rsgb_lf_group@blacksheep.org Date: Tue, 20 Apr 2004 21:40:10 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MIMEOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-AntiVirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.25.0.2; VDF: 6.25.0.20; host: postbode01.zonnet.nl) X-Spam-Score: 1.0 (+) X-Spam-Report: FROM_ENDS_IN_NUMS=0.869,RCVD_IN_SORBS=0.1 Subject: LF: station status+antenna question Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS 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-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hello all! I just finished and tested the powersupply that should power my 136kHz station. 50V/16Amp continue without any problem. That 16Amp is the point where I set the current protection, but the transformer is a 1000VA type....... Most transmitter components are here, but waiting for just a few difficult parts. Meanwhile I'm thinking of what kind of antenna I will use. I am planning to take down all my VHF-antennas from my old tower, and extend the tower up to 20 meters. The tower is ungrounded, but it does stands in concrete. I want to put up some kind of isolated toploading with 'pancake-coil' and some short wires (like EI0CF did in the past), and then feed this by a single thick wire, well isolated and some meters away of the tower. This sounds nice, but I have really no idea what influence the metal tower will have on the performance. It isn't directly grounded, but I suppose there will be some leakage in the concrete. Anyone with experience on this around? 73, Dick, pa4vhf