[TowerTalk] tower/rotator woes...

[Ken K6MR]

Most crankups have a sufficiently large sleeve in the top that the shim is not really necessary. We are talking 1/32” here. Even the sleeve in the Rohn pointy top sections is spec’d at 2.08 I.D. (1/32” = 0.0313”). That’s way more than necessary to allow for the eccentricity that would be present when using a 2” nominal mast.

My guess at the original poster’s problem is unbalanced torque present under windy conditions. Bencher seems to be the only tribander that includes a torque compensator in their design.

Ken K6MR



From: john at kk9a.com<mailto:john at kk9a.com>
Sent: Sunday, February 19, 2017 4:39 PM
To: towertalk at contesting.com<mailto:towertalk at contesting.com>
Subject: Re: [TowerTalk] tower/rotator woes...

Many years ago when I had a small tribander at my parent's home, I had a Ham
IV and I shimmed the clamp because I used a water pipe mast which was 1.90
OD. I have not used that style rotator since then and I was surprised to
look at the manual today and see that the T2X was designed for a 2 1/16
mast.  Who uses this size?  This seems like a poor design and at a minimum
they should include a shim pack.  How many people are properly using shims
with Hy-Gain rotators?

John KK9A

Re: [TowerTalk] tower/rotator woes...
from [Kim Elmore]       [Permanent Link][Original]
To:     DAVE WRIGHT <kanives at yahoo.com>, towertalk at contesting.com
Subject:        Re: [TowerTalk] tower/rotator woes...
From:   Kim Elmore <cw_de_n5op at sbcglobal.net>


I had a similar problem because and must, with some embarrassment, admit
that I was careless and did not shim the rotor as I should have. The T2X is
made to accommodate a 2 1/16" OD mast. My mast is a galvanized steel 2" OD
and for yeas, I couldn't figure out why my T2Xs kept failing. I listened to
it and heard it bind, then carefully read the manual *again* and saw that --
Lo! and Behold! -- the T2X is designed for a 2 1/16" OD mast. I purchased
some 1/32" aluminum sheet metal and placed in in the cradle of the T2X
and... No more binding! The rotor now turns freely. The T2X is a very tough
rotor; chances are, this will fix your problem.

Kim N5OP

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