Even better than rotating the whole tower is being able to rotate the
antennas separately. In some contests, at least here in the states, it
is an advantage to have one antenna pointing at Europe and another at
either japan or back into the states. If you rotate the whole tower
they all go the same way. I use the TIC ring rotors here for the bottom
antennas on 10/15/20 to give the added flexibility. In the redesign of
the stacks last year I now have 4/4/4/4 where the top and bottom ones
rotate and the middle two are fixed at Europe. I also have another 4
element pointed south to give a quick switch for carribean and south
America... I don't know what might be useful combinations there, but
those are some ideas anyway.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: towertalk-bounces@contesting.com [mailto:towertalk-
> bounces@contesting.com] On Behalf Of John Barry EI8IR
> Sent: Wednesday, April 14, 2004 22:39
> To: towertalk@contesting.com
> Subject: [TowerTalk] (no subject)
>
>
> Hi,
>
>
> I'm in the process of planning a new tower. It will be 100ft high, and
> guyed at 30ft, 60ft and 90ft. I intend having a pair of monobanders
for
> 20m
> / 15m / 10m and it will be built as part of a multi-single station. I
> already have a TH7 at 70ft.
>
> My dilemma is how and what to rotate !
> Do I rotate just the top set of antennas, leaving the lower ones in a
> fixed
> direction. This will be useful for instant direction change or will
allow
> a
> multiplier station use the fixed antennas.
>
> or do I rotate the whole tower. This will allow the beams to be
phased,
> and
> allow a choice of higher or lower antennas when the band is open, but
will
> not be of much use to a multiplier station.
>
> I guess this is more question of the relative usefulness of either
> configuration in a m/s contest as it is more-or-less the same hardware
> deployed differently.
>
> Also, the 20m antennas will be at 90ft and 60ft ... will this be a
useful
> pair when stacked? or are the antennas too close to notice any
> difference??
>
>
> Many thanks
>
> John ei8ir
>
>
>
>
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers",
"Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041
with
> any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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