R: [TowerTalk] HOW HIGH IS TOO HIGH

[Maurizio Panicara]

No, if you are going to install horizontally polarized antennas the surface
of the ground will take part in the game as the reflecting media.
Horizontal polarization, luckily, takes a minimal difference by ground type,
and it's quite sure that in the hf range the soil what you have won't behave
like a dielectric but only as a bad ground.
Last but not least, unless the area is totally flat (sloping grounds can
give extra gain or losses on certain angles), the height to consider from
the antenna (plane) is that were the reflection occurs (wavelenghts away
for mid-low angles) and not what's between the antenna and the base of
the tower.

73,
Mauri I4JMY



-----Messaggio Originale-----
Da: Dave Jordan <wa3gin@erols.com>
A: Towertalk <towertalk@contesting.com>
Data invio: sabato 7 agosto 1999 14.04
Oggetto: [TowerTalk] HOW HIGH IS TOO HIGH


SO, I wonder are my towers sitting on a
> big insulator made of sand -- if I should be adding the depth "to"  the
> water in the creek to the effective height of my beams when considering
> placement on the tower?  If the beams are installed 120ft above the sand
> is it really more like 145ft+???
>
> HAVE FUN,
> Dave
> WA3GIN









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