SteppIR Antennas — MonstIR
15
Boom Assembly
The boom was completely assembled and drilled and marked at the factory to assure
precision element alignment. You may notice in some cases that on a given splice (
Picture
4 .5
) the holes on each side of the splice are at 90 degrees with each other. This is as de-
signed and
not
a mistake. The pre-drilled holes are quite snug and align almost perfectly.
The holes are purposely tight so no movement is allowed. Movement will cause work
hardening and that leads to boom failure. Therefore,
DO NOT
drill out the holes for more
clearance. Thread the bolt in as far as possible, then lightly tap with a hammer to seat the
bolt.
If the holes are visibly out of alignment when you are assembling the boom, you probably
have the boom pieces put together in the wrong order – or the boom sections that do not have
an element bracket on them may need to be rotated 180 degrees. Each boom piece has a
number permanently
written
,
scribed
or
stamped
on it. Match each number with the exact
same number of a corresponding boom piece.
Picture 4.5
shows joint # 1 markings inside
the ring (they must line up).
Figure 1
shows how each boom section is numbered.
Picture 4.1
Picture 4
Picture 4.5