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From: steveeh131047
Date: Wed, 27 Oct 2010 Time: 05:10:05 Ian, Here's how results from your approximation formula diverge from more- accurate Zo figures: http://www.karinya.net/g3txq/temp/ladderline_zo.png 73, Steve G3TXQ But I take it that your picture still applies to single-core conductors, and very fat conductors at that. With the feedline I have in mind, S=55mm and d=1.2mm, so S/d=27.5, which is way off the end of the scale in your picture. -- 73 Ian, G3NRW |
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