[TowerTalk] Mounting rotor on 25ag2 top section?

[Chuck Dietz]

I mount all of my antennas/rotors that way.  It works fine.  No need to
grease anything.  Just be sure you have the tube top that is large enough in
diameter to allow a 2" mast to pass through it.  Rohn made some with small
diameter tube tops and a "set screw" on the side to hold a small diameter
mast.
	Be sure to clamp your mast an inch or two above the top of the rotor
housing so the mast does not rest on the rotor housing.  Then, if you want
to change rotors, you can place a clamp on the mast at the top of the tube
top section to hold it while you change rotors.

Chuck W5PR


-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Carrington, Walter
Sent: Friday, December 03, 2004 4:16 PM
To: towertalk at contesting.com
Subject: [TowerTalk] Mounting rotor on 25ag2 top section?

I have a Rohn 25ag2 top section (used);  this is the tapered top section
that has a single vertical tube at the top.  It appears that the way the
rotor and mast were mounted was rotor on a plate inside the tower a couple
feet down from the top,  and the mast running through the inside of the
tower section's vertical tube.  Is this a reasonable way to do it?  Should
there be a bushing inside the tube (there is none now)?  Won't friction be
pretty high? Do I grease the mast?  Will it ice up badly? (I live on a very
windy, cold, icy hill)?
    My rotor has an adaptor that allows me to mount it directly to the
section's vertical top tube,  but it is not as strong as mounting it to a
plate inside the tower section.  This will be a temporary installation for
the winter,  30' or 40' high.  I'll have a couple of long VHF yagis on it.
73,  Walter,  K1CMF
    
     
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