[TowerTalk] None

[Doug Faunt N6TQS +1-510-655-8604]

In-reply-to: <BAY9-F33q6pcgv9PCna00008ebb at hotmail.com> (ve3zi at hotmail.com)
Subject: Re: [TowerTalk] Insulated Wire
FCC: ~/sent_mail/sent_mail
References:  <BAY9-F33q6pcgv9PCna00008ebb at hotmail.com>
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Maybe, use an antenna analyser to actually measure the velocity factor?
You can do it with coax, but I don't know exactly how you'd do it with
a plain piece of wire.

73, doug

   From: "Roger Parsons" <ve3zi at hotmail.com>
   Date: Mon, 28 Jul 2003 17:53:01 +0000

   I am building a wire array using insulated wire (copper clad steel + 
   jacket). The insulation will change the velocity factor of the wire and 
   therefore change the required lengths of the elements. EZNEC does not have 
   an option to calculate the actual lengths required, and I am wondering if 
   there is any way to do this? It will be very difficult (and expensive) to 
   change the antenna once erected, and as the effect would be primarily on the 
   array pattern rather than the feed SWR it would be hard to 'tweak'.

   I have seen suggestions that wires should be 3% shorter or 5% shorter but 
   then cut and try - that is a lot of difference!

   Any suggestions would be gratefully received.

   73 Roger
   VE3ZI