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Page 16
SECTION 1.0
PREPARING THE BOOM ASSEMBLY
The boom for the UrbanBeam is simple. It
’
s a 48 inch long aluminum tube that is
1.75”
in diameter.
Place the boom on a flat surface. Take care to make sure the surface is indeed level, otherwise the
tube may roll off.
BOOM LAYOUT
Both EHUs are prepared and attached to the boom in fundamentally the same way. The control cable
connector for each EHU is plugged in, and the control wire routed in a channel weatherproofed with co-
ax seal. The EHUs are then assembled to mounting plates, which are in turn attached to opposite ends
of the boom with clamps. It
’
s important to pay attention to the orientation of the EHUs on the boom,
making sure that the ESTs (where the loop elements attach) are positioned to be closest to the ends of
the boom.
EHU MOUNTING OVERVIEW
The Boom Assembly consists of the EHUs and their mounting hardware, along with the Mast Plate and Con-
nector junction box. The order of assembly is:
•
Lay out the Boom
•
Prepare and mount Director EHU to the boom
•
Prepare and mount Driven EHU to the boom
•
Mount the Mast Plate to the boom
•
Mount the Connector junction box to the Mast Plate
OVERVIEW