Description
These heated and unheated radomes provide the feeds of
4-ft (1.2 m) parabolic antennas with protection against
weather and physical damage. Type 39180A 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 770-watt heater
is controlled by thermostats 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
requires 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 39180A, 2-GHz radome, however, must be positioned
with its arrow parallel (within 10°) to the plane
of polarization; the polarization of the heater cable
will depend on the polarization.
Align the holes and use 6 bolts to attach the radome,
and tighten them evenly. Make sure that two flat washers
are used as shown.
Heated Radomes Only
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| 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 an attach the box with the pipe clamps
end-to-end to form one long clamp. Rout the conduit
and attach it to the control box.
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| 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 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 end 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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