Return-Path: <owner-rsgb_lf_group@blacksheep.org> Received: (qmail 89192 invoked from network); 20 Feb 2004 20:12:42 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore01.plus.net with SMTP; 20 Feb 2004 20:12:42 -0000 Received: (qmail 76131 invoked from network); 20 Feb 2004 20:15:36 -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 Feb 2004 20:15:35 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1AuH3f-000JgX-IK for dave@picks.force9.co.uk; Fri, 20 Feb 2004 20:15:35 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AuH2q-00033U-BJ for rs_out@blacksheep.org; Fri, 20 Feb 2004 20:14:44 +0000 Received: from [194.73.73.93] (helo=rhenium.btinternet.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AuH2p-00033L-Oh for rsgb_lf_group@blacksheep.org; Fri, 20 Feb 2004 20:14:43 +0000 Received: from [81.129.45.61] (helo=dellboy) by rhenium.btinternet.com with smtp (Exim 3.22 #25) id 1AuH2p-0001uc-00 for rsgb_lf_group@blacksheep.org; Fri, 20 Feb 2004 20:14:43 +0000 X-Bad-Message-ID: no DNS (dellboy) Message-ID: <002d01c3f7ee$7dba62f0$1f00a8c0@dellboy> From: "Dave Pick" <dave@picks.force9.co.uk> To: rsgb_lf_group@blacksheep.org References: <000701c3f7a9$3efe6920$6507a8c0@Main> <002901c3f7e4$ef6b59e0$a71279d1@jsm> <Pine.LNX.4.58.0402201350140.3604@willow.nutstreet.net> Date: Fri, 20 Feb 2004 20:16:57 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: Re: LF: Antenna Insulators Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 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@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Dear all. I don't like pipe because water collects inside and it's amazing how far an arc can track down a damp path! If you do use it, seal the ends with silicone sealant (applied in a dry place), that seems to work. Dave G3YXM. > > > Has anyone had success using white PVC pipe (say ~ 1.5" dia) for insulators? > > I am wondering if a 12 -18" piece at the voltage ends of my flatop would be > > enough to prevent any flash-over? > > I am about to find out because I've built just such insulators for my > flattop. Mine are 2cm dia by about 35cm and have 9cm corona rings on > each end. I'll have pictures soon but are just like the ones Ralph W5JGV > built as seen here: > http://www.emachine.com/insulators/ring_finished_insulator.jpg > > That picture is from Ralph's page for these insulators which is here: > http://www.emachine.com/insulators.htm > > The mast material for my flattop was delivered yesterday, so I hope to > have WD2XFX back on the air by the time the weekend is over ... and I'll > see how these insulators perform. > > Good luck, > Eric > >