[TowerTalk] Monoband Yagi stacking heights

[Pete Smith]

At 07:47 AM 10/14/00 -0600, n4kg@juno.com wrote:
...
>Coverage of high angles drops off 3 degrees
>for each 1 degree you pick up with increasing
>height which means that the higher you go
>the LESS coverage you have.  For the really
>low angles, I like 120 ft for the high bands.
>At this height, the SECOND lobe is also
>at useful waveangles for daytime propagation.
>Fill in the hole with another antenna at 40 to 60 ft.

I think this generalization is maybe a little too general, and much truer
for the lower high bands than for 10m.  Just as an example, my C-3E at 100
ft. on 28 mHz shows lobes at 40, 26, 16 and 5 degrees, with the highest
angle lobe only 4 dB down from the lowest.  By contrast, on 20m the same
antenna has forward lobes at 10 and 32 degrees, with the high-angle one
only 1.42 dB down.  The big problem here is the deep null between the two
lobes, right where you might need gain to run Europeans in the afternoon. 

73, Pete Smith N4ZR

Contesting is ... Extreme Radio

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