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
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
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
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