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DSEFO144-12XPOL Rev 2/21
ASSEMBLY INSTRUCTIONS
1)
The antenna components should be removed carefully from the shipping container and
the individual parts counted and checked for completeness. Be careful to check all tubing
pieces for elements and hardware that may be packed inside.
In the following steps, apply a small amount of the supplied Anti-Seize Compound to the boom
joints:
2)
The boom consists of four pieces of tubing. The rear boom section has the large hole
for the driven element. The larger diameter center boom section (1 3/8" dia.) must be
connected to the rear section. Insert rear section where marked with like colors, align the #8
hardware mounting holes and slide the stainless steel worm clamp over the slotted portion of
the center boom piece. An 8-32 X1 3/4" machine screw, lock washer and hex nut complete the
process. Tighten all hardware then proceed with the front boom piece, also marked with like
colors and similarly attach the front boom section as you did the rear. Then proceed to install
the front boom extension in the same manner, but using an 8-32 X1 1/2" machine screw, lock
washer and hex nut.
3)
The element bundle contains all of the elements needed for assembly. Take time to
inventory each one and check off each dimension with Table 1. Some elements vary by 1 or
2mm in overall length, so extreme care in measuring is called for here. Arrange elements in
order of descending size and mark each element with a scribe for proper location of the
“keeper” (See Table 1 and Figure 1). The reflector is the longest element, and each
succeeding director is slightly shorter. DIR # 10 is the shortest. The keeper must be installed
as shown in Fig. 2. Once you have marked each element, using the hollow assembly tool
supplied, slide the keeper to within 1/8” or 3mm of the scribed line. Final adjustment will be
done on the antenna. Note that the keeper is a one-way device only. If you go past the scribed
line, you must continue to the element end and start the process over. A good trick is to install
the element in a bench vise with the scribed line flush with the edge of the vise jaws. Push the
keeper until it is against the edge of the jaws. This way, it is impossible to overshoot the
scribed line. Again, be aware that the keepers are designed to go on the element only in a
certain way. Now attach one keeper to every element as advised in
Table 1 and shown
below.
See pictures below for keeper orientation. The front side, with the tabs going inward, is the
side to push onto the element. The rear side, with the tabs going outward, is the side that
faces you. It is the side that goes face down into the element tool.
Keeper Front side Keeper Rear side
Содержание DSEFO144-12XPOL
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