Return-Path: Received: from mtain-dg10.r1000.mx.aol.com (mtain-dg10.r1000.mx.aol.com [172.29.65.18]) by air-ma05.mail.aol.com (v129.4) with ESMTP id MAILINMA052-b5254cc45a7ebd; Sun, 24 Oct 2010 12:10:38 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dg10.r1000.mx.aol.com (Internet Inbound) with ESMTP id 0A84C380000C1; Sun, 24 Oct 2010 12:10:36 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PA37i-0002SX-FN for rs_out_1@blacksheep.org; Sun, 24 Oct 2010 17:08:42 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PA37h-0002SO-Ry for rsgb_lf_group@blacksheep.org; Sun, 24 Oct 2010 17:08:41 +0100 Received: from smtp-vbr5.xs4all.nl ([194.109.24.25]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PA37f-0006Fg-48 for rsgb_lf_group@blacksheep.org; Sun, 24 Oct 2010 17:08:41 +0100 Received: from pc-roelof (ndb.demon.nl [82.161.81.65]) by smtp-vbr5.xs4all.nl (8.13.8/8.13.8) with ESMTP id o9OG8XxN031607 for ; Sun, 24 Oct 2010 18:08:38 +0200 (CEST) (envelope-from roelof@ndb.demon.nl) To: rsgb_lf_group@blacksheep.org References: <4CC05B8F.2030406@iup.uni-heidelberg.de> <1237369649.1611432.1287678227104.JavaMail.fmail@mwmweb077> <4CC070EA.30703@iup.uni-heidelberg.de> <4CC1C2EF.8080007@iup.uni-heidelberg.de> <757145.20787.qm@web111905.mail.gq1.yahoo.com> <979620351.2557914.1287853881158.JavaMail.fmail@mwmweb077> <1287855842.4cc31ee2b778a@imp.netikka.net> Date: Sun, 24 Oct 2010 18:08:31 +0200 MIME-Version: 1.0 From: "Roelof Bakker" Message-ID: In-Reply-To: <1287855842.4cc31ee2b778a@imp.netikka.net> User-Agent: Opera Mail/10.63 (Win32) X-Virus-Scanned: by XS4ALL Virus Scanner X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Content-Type: text/plain; charset=iso-8859-15; format=flowed; delsp=yes Subject: Re: VLF: here no results from DK7FC's 8th experiment 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-sid: 3039ac1d41124cc45a7c4723 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) Hello Paul-Henrik, I have build a special mini-whip for Michael Oexner, which uses CAT5 network cable for RF and DC feed. It is equipped with an isolating transformer in the mini-whip and antenna interface plus common mode chokes in the DC feedline. The isolating transformers are obsolete MCL type TT1-6's, which have a lower roll off of 4 kHz. I had a limited supply of TT1-6's and have replaced them with a home made transformer wound on a Amidon BN-73-202 binocular core. As far I can see the frequency response is the same. Unfortunately I had to go out of town on Saturday and could not participate in the experiment. 73, Roelof, pa0rdt