GB> technical help needed

[Gerald C. Lemay]

Several years ago, I used Yagimax to model and fine tune several 2 element
yagis. It was an excellent tool. There was also a utility called Taper which
was used to determine correct element length depending on tubing size. I
(dimly) seem to remember that .1 wavelength gave me the most gain. But then
gain, front to back, and bandwidth varied with frequency and none of them
converged at the same point. When you get down to it, designing  a good
performer is more than just putting up something based on a rule-of-thumb.

-----Original Message-----
From: Heathkit Owners and Collectors List
[mailto:HEATH at LISTSERV.TEMPE.GOV]On Behalf Of Glen Zook
Sent: Tuesday, December 24, 2002 6:27 PM
To: HEATH at LISTSERV.TEMPE.GOV
Subject: Re: GB> technical help needed


It varies all over the place!  You can start with 0.1
wavelength, but the placement, length, etc., will
affect the feedpoint impedance as well as the forward
gain and front-to-back ratio.

You really need one of the modeling programs.  I think
that yagimax is still available at qrz.com.  This will
give you the means to determine all sorts of
parameters.

Glen, K9STH


--- rayfri <rayfri at networld.com> wrote:

Whats the formula or method for determining how far
behind a driven element the reflector should go?

=====
Glen, K9STH

Web sites

http://home.attbi.com/~k9sth
http://home.attbi.com/~zcomco

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