Rob,
I've had considerable experience with single element
Long Wire Antennas, mostly on the WARC Bands where
an 80M dipole acts as a current fed Long Wire of odd
multiples of 1/2 WL. These are VERY effective antennas
when the major lobes are aligned with the desired target
area(s).
>From that experience (and modeling) I note that Sloping Wires
generally have poor performance unless great care is taken to
align a major lobe with the desired takeoff angle.
That said, your BEST bet would be to select a wire length
and play with computer modeling to obtain a useful design.
You will want to consider the Length of each wire, the Angle
between the wires, and the angle between the wires and ground.
Note that high antennas are typically good band openers
and closers, LOW antennas (40 to 60 ft) are often BEST
during midday when the sun is up.
W3LPL (and others) have found that 10M horizontally polarized
antennas at 200 ft seem to cover ALL angles well since there
are so many very narrow lobes separated by very small angles.
I expect that irregularities in the foreground fills in the
narrow nulls that would be expected from reflections
from a perfectly flat foreground.
Tom N4KG
On Tue, 3 Dec 2002 (GMT) =?iso-8859-1?q?Robert=20Thain?=
<g0hgw@yahoo.com> writes:
> Hi,
>
> I have access to a 40-50 meter water tower and would
> like to put out a big signal State side during the
> ARRL 10m contest.
>
> I was thinking about a V beam.
> This is where the apex of the V is up heigh and the
> tails of the V ( Usually wavelengths long ) run
> diagonally to the ground.
>
> However I just cant find ANY information on this
> antenna.
>
> Where can I find some info ?
> OR
> Is there a better antenna I could make from wire and
> make use of this height ?
>
> Thanks
> Rob,
> G0HGW
>
> PS how do does one do a search on the Archives on
> TowerTalk without going though them all manually ?
>
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