Stein Roar Brobakken wrote:
Do not confuse the dual driven element on KLM antennas
with a 2 element ZL-special type beam. The KLM
dual driven element does not provide any significant
gain over a single element and is more closely related
to the LPDA.
The CAL-AV is a very well designed antenna, but it
will not teach you anything about designing KLM style
Yagi's.
Rick N6RK
> Hi
>
> I have plans to make a 4 to 6 element yagi for 20 or 40m since I have
> pretty
> lot of aluminum tubes and parts in stock.
>
>
> Have any other made a mono-band yagi with dual-driven element like the
> such
> like:
> * KLM KT34XA ? KLM use 55" / 140 cm spacing about 0.065 wavelength on 20
> m.
> *KLM 40m 4 el with dual driven element. I don't what spacing they use this
> one, but it works super from OH8X in stack 1/2 wl spacing.
> *The 2 el dual driven element 40m yagi from
> http://www.cal-av.com/2d-40.html
> which using 0.11 wavelengths.
>
> The Dual driven element is nothing new as it is almost the same as HB9CV
> and
> ZL-special which use about 0.125 wavelength spacing between "the front and
> rear" element.
>
> What do you think is the good optimized setup to use in a 4 to 6 el yagi ?
> I
> am just familiar with old Quickyagi and not familiar with Eznec, but I am
> wondering if anyone have calculated or tested this things??
>
>
> I planned just to use same configuration as a 3 element yagi with same
> spacing to reflector and director, BUT with dual-driven elements..... I
> cannot model it in quickyagi...
>
>
> 73 LA6FJA Rag
>
>
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