[NLRS] Comment on "I am running x elements"

[Zack Widup]

Exactly right! I have been playing around with various Yagi designs on Yagi
Optimizer and building them for years. The goal has been the most gain
that I can get out of the minimum number of elements. This is because I've
been doing a lot of portable operation where I put the elements into the
boom when I get to the site.

I have discovered a couple relationships though. The number of sidelobes of
the antenna is related to the number of elememts - the more elements, the
more sidelobes. Also, I've found a beam with fewer elements per boom
length is more affected by antennas for other bands placed in close
proximity to it.  Other than that, I've been able to get a lot of gain out
of a couple designs of long-spaced Yagis.

I'm off to stuff the car with the rest of my gear and head for the hill in
EN50rl to set up for the contest. And put together all those Yagis ...
:-)

73, Zack W9SZ



On Fri, Jun 12, 2009 at 10:12 PM, tom ring <taring at taring.org> wrote:

>
>
> The gain of a yagi is most closely related to the length of the boom in
> wavelengths.  In fact, a well designed yagi can have its gain predicted
> within
> about .3 dB knowing only the length.
>
> However the gain suffers if the number of elements is insufficient, so the
> number of elements is useful to know.  But without the length, it is a
> fairly
> meaningless number.
>
> tom
> K0TAR
>
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