> Based on information that Roger Cox of HyGain has previously posted
> to the Towertalk group, putting the boom broadside to the wind is
> best of HF antennas.
Not so fast!
ON4UN's excellent book Low Band Dxing (an ARRL publication) is much
clearer on the subject. In section 13 paragraph 3.3.4.1 he writes:-
"If the area of the boom is smaller than the area of all the
elements, then put the boom perpendicular to the wind. And vice
versa......"
He then works through a detailed example of calculations. He also
offers software including a WIND AREA module which makes the
calculations fairly easy.
It is clear that if you have a short boom HF antenna, the elements
will have a higher wind load, but for a multi-element and therefore
long boom antenna, the boom has the higher wind load. You need to
calculate to decide which applies to you.
These things are NOT a matter of opinion as some contributors seem to
think. Do some number crunching and work on the basis of FACT!
.
,--_|\ Morrison Hoyle - vk3bcy@dcsi.net.au
/ Oz \ - Phone +61 (0)3 56891205
\_,--\_/ - PO Box 248, FOSTER, Vic 3960 Australia
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