Description
These heated and unheated radomes provide the feeds
of 6-ft (1.8 m) parablic antennas with protection against
weather and physical damage. Type 39181A heated
radome is designed for single-polarized, 890-2700 MHz
antennas.
A 120- or 240-volt, 50- or 60-hertz power source can be
used to energize the radome heater. The 1525-watt
heater is controlled by therostats to operate between
the limits of 22 and 38°F (-5.6 and 3.3°C). The
thermostats are housed in a weatherproof control box that
mounts on a tower member or the tower mounting pipe
for the antenna.
Notice
The installation, maintenance, or removal of antenna
systems require qualified, experienced personnel. Andrew
installation instructions have been written for such
personnel. Antenna systems should be inspected once a
year by qualified personnel to verify proper installation,
maintenance, and condition of equipment.
Andrew disclaims any liability or responsibility for the
results of improper or unsafe installation practices.
| 1 |
Attach Radome to Antenna. Have two persons
handle the radome and place it against the reflector
rim so that the flash trademark is correctly positioned
as shown. For heated radomes, the power cable must be
near the top of the reflector. Also, the red tape on
the radome must be adjacent to the red tape at the top
of the reflector.
The Type 39181A, 2-GHz radome, however, must be
positioned with its arrow parallel (within 10°) to the plane
of polarization; the position of the heater cable will
depend on polarization.
Align the holes and use 9 bolts to attach the radome,
and tighten them evenly. Make sure that two flat washers
are used as shown. For the Type 39191B heavy-duty
radome, use 12 bolts for attachment.
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Heated Radomes Only
| 2 |
Attach Control Box. Remove the cover plate from
the control box. Tightly attach the box connector
to the control box, using weather sealant tape on the
threads.
Position the control box on a tower member or the
tower mounting pipe and attach the box with the pipe
clamps provided. For large pipes, attach two clamps
end-to-end to form one long clamp. Route the conduit
and attach it to the control box.
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Click here to see picture below enlarged
| 3 |
Install Heater Cable. Route the heater cable to the
control box as shown. Fasten the cable to the rear
surface of the reflector with the two cable clamps and
size 10 self-tapping screws provided. Drill holes in the
reflector for these screws using a size 21 drill, diameter
0.159" (4 mm).
Tape the remaining cable to the mounting framework at
12" (30-cm) intervals and pass the cable and through the
control box connector. Fold and tape excess cable near
the control box. Tighten the cap of the box connector to
ensure a weather-resistant connection.
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