Return-Path: X-Spam-DCC: paranoid 1102; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id tAPBZ123022478 for ; Wed, 25 Nov 2015 12:35:01 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1a1YE7-0000L0-A7 for rs_out_1@blacksheep.org; Wed, 25 Nov 2015 11:27:07 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1a1YE6-0000Kr-Uo for rsgb_lf_group@blacksheep.org; Wed, 25 Nov 2015 11:27:06 +0000 Received: from smarthost01c.mail.zen.net.uk ([212.23.1.5]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1a1YCx-0003gX-C3 for rsgb_lf_group@blacksheep.org; Wed, 25 Nov 2015 11:27:05 +0000 Received: from [82.70.254.222] (helo=OfficeWin7.lan) by smarthost01c.mail.zen.net.uk with esmtp (Exim 4.80) (envelope-from ) id 1a1YCg-0000oF-U2; Wed, 25 Nov 2015 11:25:39 +0000 Date: Wed, 25 Nov 2015 11:25:38 +0000 From: Chris Wilson Organization: Gatesgarth Developments X-Priority: 3 (Normal) Message-ID: <1214051631.20151125112538@chriswilson.tv> To: rsgb_lf_group@blacksheep.org, rsgb_lf_group@yahoogroups.co.uk MIME-Version: 1.0 X-Originating-smarthost01c-IP: [82.70.254.222] X-Scan-Signature: 086f3faad0220c9ae57a7913e711a86d Subject: LF: Is a capacative top hat only as good as its lowest point? Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 5308 25 November 2015 As I am under a lot of pressure with work I was thinking of a quick and simple way to improve my aerial. Better ground wires under the perimeter of my horizontal quad loop "top hat" is number one. But another thing I could probably implement fairly easily is to raise one corner of it by running that corner to the top of my 40 foot mast with a fairly long support cord to keep the loop a fair way from it. Would raising just one corner, (which would also allow a somewhat higher vertical section), achieve much, if anything? Thanks. BTW, the power supply bridge rectifier blew in my G3YXM amp the day before yesterday, and I was testing with the "HV" sourced from a 0 to 40V bench supply. For fun I tried to see how low a voltage to the FET's it would run at, and I got down to 4.9V measured actually at the FET's, running. I achieved this contact last night: 2015-11-24 17:50 2E0ILY 0.137536 -25 0 IO82qv 0.1 G4MSN IO93fu 129 34 It has triggered me to pull my finger out and build the 136 kHz filter for my Hans Summer U3 QRP transmitter! -- Best regards, Chris 2E0ILY mailto:chris@chriswilson.tv