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DSEFO222-22 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.
2)
The boom consists of five pieces of tubing. The rear boom section has the driven
element connector and balun already preassembled and attached
.
The larger diameter rear-
mid boom section (with black on one end and red on the other is next. This is followed by the
center boom section which has a red mark on the rear and a blue mark on the front. The front
mid boom section has a blue mark on the rear and a green mark on the front. Last, the front
boom section has only a green mark on the rear where it attaches to the front-mid section.
3)
Install all of the element insulators by pressing them into the holes in the boom. They
will snap in place and should not fall out. We include a couple of extras just in case!
4)
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 # 20 is the shortest. The keeper must be installed
as shown in Figure 2. Using the aluminum tubing tool supplied, slide the keeper to within 1/8"
or 3 mm. 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. Place the first keeper on all elements.
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
