Return-Path: Received: (qmail 18640 invoked from network); 16 Dec 1999 19:05:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by teachers.core.plus.net.uk with SMTP; 16 Dec 1999 19:05:22 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 11ygZC-0005uR-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 16 Dec 1999 19:27:58 +0000 Received: from mailhost.netscapeonline.co.uk ([194.200.20.13]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 11ygZB-0005uM-00 for rsgb_lf_group@blacksheep.org; Thu, 16 Dec 1999 19:27:57 +0000 Received: from userbc22.netscapeonline.co.uk ([62.125.139.1] helo=netscapeonline.co.uk) by mailhost.netscapeonline.co.uk with esmtp (Exim 3.02 #1) id 11yg3x-0002DQ-00 for rsgb_lf_group@blacksheep.org; Thu, 16 Dec 1999 18:55:42 +0000 X-Priority: 3 X-MSMail-Priority: Normal Message-ID: <38593504.FF3F34A4@netscapeonline.co.uk> Date: Thu, 16 Dec 1999 18:52:52 +0000 From: "malcolmg3kev" X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Organization: Netscape Online member X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win95; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: (no subject) References: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Re-Ropes, insulators. Hi Tom. You are correct, anything out side will suffer eventually, it will either rust, corrode or in the case of the ropes discussed will degrade and get brittle. They should be replaced every couple of years and do not wait until they fall down or break. I replace my ropes and insulators frequently even though they look good. I have just spent today refurbishing my antenna system and have increased the height to about 110 feet vertical, and added another inv L. I now have 3 inv L's in parallel. each one is 110 ft vertical and 250 ft top section. These all feed to a common point and connected to my loading inductor, I also replaced the insulators, heavy duty marine type, as before and guaranteed no melt down. I use a minimum of 2.5 mm insulated antenna wire and change this also frequently to avoid a breakage. The refurbished system was re-resonated and tested this afternoon and I got a 599 report from GI3PDN, the effort was worth it. 73 de Mal/G3KEV Tom Boucher wrote: > >From Tom, G3OLB > > Be careful using polypropylene as guys for masts over a long period. > They degrade with ultra-violet exposure and become very weak. I lost a > 55 ft mast some years ago in Farnborough due to the 6mm polyprop guys > breaking in a storm. Don't think my neighbour was too impressed about > having the mast, complete with dangly antennas, suspended horizontally > across his garden! > > 73, Tom > > In message <3853A88D.58495524@netscapeonline.co.uk>, malcolmg3kev > writes > >Also available at yacht suppliers are a variety of marine grade > >polypropylene strong ropes for guying towers and being non conductive > >are ideal.