All true. And thinner conductors have slightly higher inductance than
fatter ones of the same length.
73,
Dave AB7E
Jim Brown wrote:
> On Mon, 23 Nov 2009 15:01:13 -0600, Stan Stockton wrote:
>
>
>> Am I missing something in the way I am modeling it or should I
>>
> expect to see the results shown by the computer. I am suspicious of
> the model since I can change the vertical portion of the reflector
> to #10 wire instead of #18 wire and the max gain moves up about 40
> khz. I would have thought it would have moved it down some?
>
> Stan,
>
> I have a lot to learn about Yagis (and this is sort of a Yagi, if I
> understand what you're doing), but I've been studying a bit in the
> ARRL Antenna Book and building some Yagis. One thing I think I've
> learned is that the thing that makes it work is the phase of the
> current in the passive elements, which is set by their physical
> length as a fraction of a wavelength. As I understand it, the
> resonance of the driven element does not matter (or does not matter
> much) in determining directivity, and can be varied to achieve a
> match (with the hairpin or gamma or whatever).
>
> Others may know a lot more than I do about this, so take this as a
> clue, not a definite "I know this for sure" sort of reply.
>
> 73,
>
> Jim K9YC
>
>
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