Installation
IMPORTANT
The TH51MK2 is a moderately large antenna and requires some
consideration as to how you are going to get it to the top of the tower.
Installation Crank the tower down completely or as low as it will go, and block all sections
On a Crank-Up from moving by using a 2" x 4" piece of wood or a solid iron bar for heavier
Tower towers. The block should be inserted through the lattice structure before the
tower is completely down, then the tower can be cranked down until the block takes the weight
off
of the
winch.
Use a ladder to reach the top of the tower. NEVER CLIMB THE LATTICE
STRUCTURE OF ANY CRANK-UP TOWERI Attach the mast to the tower and
rotator. (The cast aluminum boom-to-mast brackets should be installed on the
mast as shown in Figure 1 in Chapter 3.) Attach a gin pole to the tower to assist
in liftin
the TH5/MK2.
Attach the lifting rope to the balance point of the antenna. Be careful not to
damage the phasing line assembly next to the boom-to-mast clamp. The lifting
rope should be fed through the gin pole or other pulley arrangement attached to
the tower. The other end should be at ground level, available to the ground crew
for lifting. Guide ropes may be loosely looped over the boom ends and used by
the ground crew to guide the antenna away from the tower and ladder. Each
guide rope's two loose ends should be held by the ground crew, so that.the
guide rope can be retrieved.
Attaching the
Antenna to
the Mast
When the antenna reaches the mast bracket, the two (2) 5" bolts should be
inserted through the top two holes in the mast bracket and secured using 5/16"-
18 lockwashers and nuts. The other two remaining 5/16"-18 x 5" bolts should
now be installed and secured with the same lockwashers and nuts. Tighten all
bolts securely. You may wish to use a deep well socket set to tighten these
bolts.
NOTE:
The use of two split lockwashers on the 5" bolts may be necesaary to
properly tighten the clamp on a 2" mast. Additional washers may be
needed if masts is slightly smaller than 2
"
Other
When installing the TH5/MK2 on a guyed tower, you may wish to use a different
guide system. If you have insulators on your guy wires, you will need to keep
the antenna away from the guy wires as well as the tower. You may wish to use
two ropes attached together at the top of the tower and attached to the ground
about 15 feet apart. These two ropes can then be used to slide the antenna on
as it is also being lifted. The two ropes will need to be far enough from the tower
base to allow some sag and still support the antenna away from the guy wires.
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