Shively Labs 6842, Instruction Manual Installation, Operation, & Maintenance

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Bay Assembly
12
Attach the bay arms
(antennas with de-
icers).
The bay de-icer pigtail is shipped pre-assembled. Handle the de-icer compo-
nents carefully to prevent damaging them when assembling the bay.
CAUTION
When installing the screws securing the arms to the stubs ( Figure 9 c),
be very careful not to damage the bay de-icer heater ( 15 ) and pigtail
( 16 ) within.
[for single bay antennas and 1/2-wave-spaced antennas only]
a. Using 1/4-20 x 1-3/4" hardware ( Figure 9 a, 2 , 3 , and 4 ), attach the four
antenna arms ( 5 ) to the
innermost
pair of holes on the boom ( 1 ) mounting
stubs.
[for 2- to 8-bay full-wave-spaced antennas only]
b. Using 1/4-20 x 1-3/4" hardware ( Figure 9 b, 2 , 3 , and 4 ), attach the four
antenna arms ( 5 ) to the
outermost
pair of holes on the boom ( 1 ) mounting
stubs.
c. Tighten the hardware before continuing.
Attach the feedstrap.
a. If necessary, remove the bolt and washers ( Figure 10 , 6 , 4 , and 7 ) from the
center of the endseal (the white plastic dome on the antenna mast).
b. Using the endseal hardware you removed above, attach the center hole of
the feedstrap ( 8 ) to the endseal, but do not tighten it fully yet.
c. Using the 1/4-20 x 1-3/4" hardware ( 2 , 3 , and 4 ), attach the feedstrap ends
to the inside of the antenna arms as shown. Tighten to 7 ft-lb.
NOTE
The feedstrap should cross the antenna mast at an angle of approxi-
mately 22° from perpendicular, as shown.
Important!
Do NOT twist the feedstrap with the endseal nut tightened. You may
damage internal components.
d. For antennas without radomes, grasp the flat sections near the center of the
feedstrap, and twist it in a flat plane until the center section rests (the ends
of the feedstrap will twist, as shown in
Figure 10 - and it will spring back
somewhat) crossing the antenna mast at a 84° - 90° angle.
CAUTION
Tighten the endseal hardware only until the lock washer flattens. Do not
overtighten.
e. Tighten the endseal hardware.