I had good luck with Yaesu G-2800 DXA rotators in Aruba, however once removed
from the tower the corrosion would lock them up. I am guessing that the
constant trade winds causing the antennas to rock back and forth kept things
loose. Do you have a corrosion problem in your part of Thailand?
----- Original Message -----
From: Charles Harpole
To: john@kk9a.com ; towertalk towertalk
Sent: Monday, January 14, 2013 01:50
Subject: GA-3000 found, tnx
This item is often hidden under "Accesories, general" title or is with the
rotors accessories.
I am awaiting my order final confirmation. So, likely I will have one soon.
For those who are wondering, this item GA-3000, made by Yaesu, mounts under
the rotor and above the rotor plate to provide a little bit of "wiggle room"
for the rotor as it lines up with thrust bearing(s) above it. This alignment
is a constant problem with large arrays, especially with lots of straight line
wind pressure on the mast. I have had problems with alignment with two of my
towers in the past, one with one thrust bearing and the other tower with two
bearings.
I "solved" the one-bearing problem by elevating the T2X half inch on its
bolts, but with the bolts locked with nuts above the plate, which allowed the
rotor to float a little. Even with two bearings (and a HyGain Xmas tree on
top) on the second tower, I got too much mis-alignment with, on this tower, the
T2X binding and stopping. Giving up on the T2X, I installed a new Yaesu G 2800
which, for one reason or another, turned just fine.
In August, a very freak straight line wind hit for about 10 minutes (enough
to have my Thai wife praying at the window) bent my straining 80ft Trylon over,
bringing down my Xmas Tree and Yaesu rotor. More than half of each yagi was
ruined, but using the remainder and parts from TH 7s, I was able to rebuild the
20 and the 15, and make a all new 10/6 meter interlaced yagi for the top of the
undamaged 23+ feet chrom/moly mast.
This week, finally a new 80ft Thai-made tower is up and the rebuilt yagis fly
in the air again. HOWEVER, after sitting for months, the Yaesu rotor will not
turn. A spare T2X (used but working when put into good storage) will release
the brake but will not turn, so no rotor yet. I remember some ham asking, yrs
ago, why we can buy a $500 clothes washer, with a reversable motor, which lasts
10 years, and yet our bigger bux ham rotors fail frequently. In 51 yrs of
hamming, rotors have had the greater failure rate way above all my other
equipment. Huummmmm.
73, and tnx for help finding item. HS0ZCW
Charles Harpole
k4vud@hotmail.com
> From: john@kk9a.com
> To: TOWERTALK@contesting.com
> CC: k4vud@hotmail.com
> Subject: re :[TowerTalk] any source for a GA-3000 ???
> Date: Sun, 13 Jan 2013 23:41:20 +0000
>
> Where did you look?
> http://www.hamradio.com/detail.cfm?pid=H0-002771
>
>
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