[Antennas] 40 meter yagi help

Fri, 29 Nov 2002 11:45:48 -0600

If you can, I would use helically wound elements....that way the
electrical length is still fullsize..but physically it would be much
smaller...I would not use midelement loading coils as your B/W 
would suffer...With the helical elements, your feed point Z should
be close to what a full size element would be...and the bandwidth
would be much better than a mid loaded element..

a 40mtr yagi should be nice...we had one at my college club station
(W5PDA, Lamar Univ in Beaumont TX)....and if I recall, it WAS a 
helical element version....boy talk about it being a TALKER on 40
(especially with the L4B fired up! :)

Chris
WB5ITT

[email protected] wrote:
> 
> Hello group, need some info from you antenna gurus...building a compact 2 ele. 40 meter yagi...using alot of Cebik design ... making the driven element-director style on a 10 foot boom...spacing is .08 wavelength...element lengths are 13 foot and will be using mid element loading coils of some kind(yet to be determined)..anyone have experience with this design..figuring the impedance to be somewhere from 25 to 40 ohms due to the addition of the loading coils...any info would be helpful.. thanks  73   Tim  K8WBL
> 
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