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Attach the antenna housing to the element-to-boom bracket
Figure 33 shows the element boom bracket. Place the flat side of the element housing unit (EHU) on
top of the element boom brackets (Figure 34). If the mounting holes for the element housing do not
line up with the holes in the element bracket it may be necessary to loosen the two horizontal bolts that
hold the element bracket to the boom . After mounting the element housing to the element bracket be
sure to re tighten the two horizontal bolts. Figure 35 shows the mounted end element.
The housings without the SO-239 coax connector are the director and reflector (they are identical and
interchangeable), the one with the SO-239 connector is the driven element (the balun is on the inside
of this housing). The reflector and director should be positioned so the actual fiberglass element is fur-
thest away from the driven element (Figure 35).
The driven element should be positioned so that the element is closest to the mast plate (Figure 36).
Fasten each element housing to the element bracket, using eight 10-32 x 7/8” screws, flat washers, Ny-
lock nuts. The flat washer needs to be placed between the screw head and the plastic element
housing. Tighten securely, but not too tight (if you over-tighten the nut, you may split the plastic
flange on the element housing). The dark grey element support tube (EST) on each antenna housing
will appear uneven in length - it is actually centered on the inside of the antenna housing .
The reflector element and the driven element will have the EST (offset tube) lined up so that the short
side and long side of the each EST are facing in the same directions. The director element EST
configuration will be the opposite. This is normal.
FIGURE 33 FIGURE 34 FIGURE 35
FIGURE 36
MOUNTING THE EHU TO THE BOOM
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