Message authorized by:
: geoiii@bga.com@INTERNET at EMAIL
I have somewhat similar circumstances with the tower here although it's not
quite as tall.
I have a rotating 130' Rohn 55 with stationary guys at 40', and guy rings at 80'
and 120'. I have TH7s stacked at 41', 81', and 121' using the Dunestar
stackmatch. It's a killer combination. I have a 3 element 40 mtr yagi at 130'.
For the VK0IR operation, I put up one vertical bent dipole (ala K8UR-kinda like
a vertical inverted vee) which will be the beginnings of a 4 vertical dipole
phased array. I didn't have the time or wx to get the other three dipoles up
but did manage to work VK0IR on 75 with just a single dipole.
The whole thing plays very well. I'd recommend stacked TH7s (or other good
tribanders) to anyone. It makes a very versatile, potent system...you get a lot
of bang for your buck (and space).
73...
Dave
W0FLS
______________________________ Forward Header __________________________________
Subject: Re: [TowerTalk] Spacing requirements
Author: owner-towertalk@contesting.com@INTERNET at EMAIL
To: <towertalk@contesting.com>
Date: 3/22/97 9:00 PM
>Put up 160 ft of Rohn 45, guyed at 40/80/120/160 ft., preferably with
>Philystran, or at least break up your guys sufficiently.
>
>Place the 2L40's at 80/160 which is a great stacking combination.
Yes! - the 40m yagi at 160 will work VERY well.
>Place the TH7's at 40 and 120 ft. Use ring rotors or sidearms to
>rotate.
Or better yet - keep looking for more th7's and put one
on top and one at 80' as well.
>The low TH7 is a killer during the day, often better than higher
>antennas.
Yep.
>I know I'm going to catch a lot of heat over these claims, but those
>are my OBSERVATIONS with my high and low antennas and MANY
>others with multiple antennas/heights have confirmed the same.
I will back Tom up on this - I have had the chance to use
ALOT of diffrent height antennas through at least one compleate
solar cycle from the same station.
>You could hang a pair of 80M inverted vees under the top 2L40, or >try
an 80M rotary dipole. Suspend a vertically polarized DELTA LOOP >for
160M operation. Six bands on a single tower with competitive
>antennas. Go for it!
I would suggest putting up 3 or 4 sloping dipoles for 80 meters.
I have found that they work better on 80m than a rotary dipole at
150' does for 80m.
--
George Fremin III
Austin, Texas C.K.U. "I'm on a mexican radio"
K5TR - Wall of Voodoo
512/416-7010
geoiii@bga.com
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