Jerry,
I have a G-2800SDX. The first time I installed it, I did as Yaesu directed
and pinned the mast to the rotator. This time, I went back to not pinning
it, as I wanted to be able to rotate the mast in the rotor in case the
antennas turned in the wind.
Don't forget to support the mast from the thrust bearing, so it's not
supported by the rotor.
Jim N7US
----- Original Message -----
From: "J. Kincade" <w5kp@swbell.net>
To: <towertalk@contesting.com>
Sent: Thursday, July 05, 2001 10:55 AM
Subject: [TowerTalk] Coupling for rotators
Thanks to all for the many helpful and creative ideas on this. Turns out I
was trying to overengineer this thing. The Yaesu rotators (this is my first
Yaesu, but probably not my last - I've had it with HyGain) have a completely
removable clamshell, so all I have to do is give myself a fraction of an
inch of slack at the bottom of the mast during installation and the whole
unit will slide out sideways after removing four bolts (plus the bolt
through the mast and clamshell). I've already drilled the Yaesu-specified 9
mm "anti-slip" hole in the bottom of the mast at the proper distance to keep
the mast about 3/16" away from bottoming out in the clamshell. Saturday, I
will deliver the 23' mast to the galvanizers (a five hour round trip with
the trailer), who were fairly reasonable at $100, or $140 if they have to
blast millscale off. These guys have an serious hot dip setup - one of their
tanks is 6' x 7' x 56', believe it or not. For hot dip galvanizing street
light poles, I guess. Wonder how many BTU's it takes to keep the zinc melted
in that one! Anyway, another milestone in the 45G project is nearly reached.
73, Jerry W5KP
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