Figure 11-2.--Operating instructions for Radio Set AN/PRC-77.
Minor components include a cotton duck harness
satisfactory operation improbable. An intervening hill or
(ST-138/PRC-25) so the radio can be strapped to the
a tall building may hamper or prevent contact with other
operator's back; a short antema (AT-892/RC-25) for
stations.
general, short-range service; a six-section, long antenna
Valleys, densely wooded areas, and low places are
(AT-271A/RC) for maximum range; and antenna
poor sites for setting up communications. A hilltop or a
support (AB-591/PRC-25) for use with the long
tower location increases the operating distance. When
antenna; a handset (H-189/GR) that consists of a
possible, avoid locations near a source of electrical
microphone and receiver for transmitting and receiving
signals; and a cotton duck bag (CW-503/PRC-25) that
interference, such as power or telephone lines, radar
is divided into several pockets used to store the two
sets, and field hospitals.
antennas, the antenna support, and the handset.
The AN/PRC-77 consists of a receiver-transmitter
Operating instructions for the AN/PRC-77 are shown in
(Radio RT-841/PRC-77) and minor components. The
figure 11-2.
receiver-transmitter is held in the receiver-transmitter
case by four screws. The battery box is attached to the
AN/GRC-160Radio
receiver-transmitter case by two clamps . The complete
unit, when assembled, is watertight. All controls are
The Radio Set AN/GRC-160 is designed for use in
located on the front panel. A battery plug projects from
vehicles, and it uses the same radio (RT-841) as the
the receiver-transmitter and mates with the connector of
AN/PRC-77. An AM-2060 amplifier provides operating
the battery. The power for this set is provided by a
voltage to the RT-841/PRC-77 and, also, has a
BA-4386 magnesium-alloy battery that enables the
self-contained loud speaker that amplifies the signal
radio to operate for about 30hours before a replacement
received. The installation kits are provided for specific
vehicles and are permanently installed in the vehicles.
battery is needed.
11-3