I haven't seen a dedicated log-cell yagi program, but a good reference on the 
subject the is L. B. Cebik's LPDA Notes Volume 2. It has six chapters on the 
subject, and uses EZNEC models to explore the design.  It is available from 
www.antennex.com for $22.95 for a downloadable pdf, or more for a book.
I have volumes 1 & 3 and they are good.  I have only browsed volume 2 and 
haven't modeled any log-cell yagis yet.
Steve, W3AHL
Date: Sat, 3 Jul 2010 02:34:57 GMT
From: "k3hx@juno.com" <k3hx@juno.com>
Subject: [TowerTalk] Log-cell VHF Yagi-Uda design help.
I need to come up with a log-cell yagi that will cover 144.2-162.55 MHz.
Boom length minimum is 68" and maximum is 100".
I'd be grateful for advice to locate a site which has a log-cell Yagi-Uda 
calculator.
72,
Tim
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