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

[James Duffey]

Tom - This is a good point.

Traditionally, VHF Yagis have been described by the number of  
elements. As you point out, the length is a better indicator of gain.  
However, I think that most people have trouble grasping the  
performance of Yagis specified in terms of wavelength. Somehow, a 6  
element Yagi conjures up a vision of performance that 7/8 wavelength  
Yagi does not seem to.

Perhaps better  yet is specifying the design, that is a a WA5VJB 6  
element, 2 element Moxon, a Cushcraft 13B2, and so on.

I will be out roving this weekend, but unless there is a good Sporadic  
E opening, we are unlikely to connect. - Duffey

On Jun 12, 2009, at 9:12 PM, tom ring 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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--
KK6MC
James Duffey
Cedar Crest NM