All of my Tailtwister (T2X) rotors (I have seven on seven towers, plus a
couple of spares) use a larger size mounting bolt than the Ham series. T2X
has six 5/16" - 18 bolts, 1 5/8" long (as confirmed in a manual).
Many older Rohn tower rotor plates were drilled with just four holes to
match the Ham-M mounting pattern. Newer plates have four oval holes that
will accommodate Ham-x or Yaesu rotors. And newer still added the two extra
holes for the T2X (total six). But I've seen numerous T2X installations done
on older 4-hole plates (with the two extra bolts left off -- but not what I
would recommend).
The M-Squared Orion 2800 uses a six-bolt pattern like the T2X but bolts are
3/8"-24 x 3/4" long. A beefier rotator for sure but you may need to drill
the rotor plate holes to accommodate (T2X spec is for an 11/32" hole).
73/Jon
Jon P. Zaimes, AA1K
Tower climber for hire
http://www.aa1k.us/
Cell: 302-632-2353
Reviews of AA1K tower work on eham website:
http://www.eham.net/reviews/detail/12922
Hug your favorite tower every day, and always stay connected to it.
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Raymond
Benny
Sent: Saturday, December 1, 2018 7:50 PM
Cc: Tower Talk <TowerTalk@contesting.com>; Kim Elmore
<cw_de_n5op@sbcglobal.net>
Subject: Re: [TowerTalk] Rotator Bolt Patterns
The Ham M and Ham 1 - 4 series rotators use (4) 1/4 " bolts.
The T2X uses (6) 1/4" bolts. The two additional bolts are in the same radius
as the 4 other bolts, but just centered between two of bolts on opposite
sides.
Ray,
N6VR
On Dec 1, 2018 5:23 PM, <john@kk9a.com> wrote:
I would not let bolt pattern limit your rotator choices. I have not owned a
Hy-Gain rotator in decades. Drilling holes or elongating the existing ones
is very easy. Your rotator shelf may already have elongated holes, I do not
recall doing anything to install a Yaesu G-2800 in my P40A Rohn 55G tower.
John KK9A
Kim Elmore N5OP Wrote:
I'm investigating rotor that will fit the same bolt pattern as a T2X but
that are a bit beefier. Mine works well, but in windy conditions, I can't
turn may antennas due to wind imbalance. What beefire rotators will
accommodate the same bolt pattern?
Kim N5OP
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