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Vertical Base Section
The base section is made up of an insulated mounting channel with hardware, a mounting plate, two
U-Bolt assemblies and the base antenna section which is 2" OD and 36" long.
Using
Figure 4
, attach the aluminum backing plate to the back of the Extren® insulated channel.
The base hardware kit contains four 2" hex bolts, four flat washers, four aluminum spacers, four
split washers and four hex nuts. From the inside of the channel, insert a 2" bolt with a flat washer
through each of the middle four holes, through the backing plate. Put on the aluminum spacer, a
split washer and a plain hex nut. Tighten firmly, but not enough to crush the insulated channel.
Figure - 4
Install the lower base section element (2” OD x 72” x .120 wall
thickness) to the insulated channel using the two 3/8" x 2" U-
Bolts, two saddle clamps, four flat washers, four split washers,
and four nuts as shown in
Figure 5
.
The base section tube should extend 1-1/4" beyond the bottom of
the U-bolt clamp. When tightening, observe the split washers.
When they fully seat (flatten out), the clamp is tight enough. Any
clamp should be tightened evenly from side-to-side with an equal
amount of thread above each nut.
Figure - 5
