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AN/PRC-77
Tactical Radio Set
AN/PRC-77 TACTICAL RADIO SET
The AN/PRC-77 Series Radio provides a short-range, two-way
voice communications in manpack portable and vehicular
configurations. The AN/PRC-77 supersedes its widely used
predecessor, the AN/PRC-25. It is physically and electronically
interchangeable in all manpack, vehicular and fixed radio installations
that previously utilized the AN/PRC-25. It provides greater reliability,
longer battery life, and the important improvements in spurious
response, oscillator radiation and desensitization, plus its capability for
use with "secure voice" systems, represent the very latest development
in the family of manpack and vehicular FM communications. The
equipment can be remotely controlled up to two miles with the
AN/GRA-39 Remote Control Group and is capable of automatic
retransmission (relay operation) when used with the MK-456/GRC
Retransmission Cable Kit. New improvements and modifications to this
basic radio set offer many improved features such as: encryption, anti
jamming and 25 MHz channel spacing.
OUTSTANDING FEATURES
• Fully solid state circuitry.
• Modular construction for rapid in-field servicing.
• Synthesizer provides crystal control and assures immediate netting with other radio systems.
• Convenient front panel tuning and band switch controls permit easy channel presetting and frequency
selection.
• 920 channels in two frequency bands 30.00 to 52.95 MHz (low), 53.00 to 75.95 MHz (high).
• Capability for application in "Secure Voice" systems adds greatly to its versatility.
• Compatible with AN/PRC-25, AN/GRC-125, AN/VRC-53, AN/VRC-12, AN/VRC-43 and through
• AN/VRC-49 radio sets and many other radio sets, which operate in the identical frequency range.
• The AN/PRC-77 is the basic receiver-transmitter equipment used in the vehicular sets, which operate
in the identical frequency range.
• The AN/PRC-77 is the basic receiver-transmitter equipment used in the vehicular sets AN/VRC-64,
AN/VRC-65 and AN/GRC-160.
• Capable of 50 watt output with AM-4700 Booster Amplifier Power Supply.
• Completely waterproof, compact, rugged, light-weight.
TECHNICAL DATA
Frequency range:
Low band - 30,000 to 52.95 MHz.
High band - 53.00 to 75.95 MHz.
920.
50 KHz.
Transmission-Voice and 150-Hz squelch tone.
Reception-Voice (no squelch); or voice and 150
Hz squelch tone.
Number of Channels:
Channel Spacing:
Types of Transmission and Reception:
Transmission and reception power requirements:
TransmissionReceptionType of modulation:
Transmitter output power:
Type of squelch:
Distance range:
Type of antennas:
Short antenna-Antenna AT-892/PRC-77
Long antenna-Antenna AT-271A/PRC
Power source:
Battery life (BA-398/U):
RT-841/PRC Receiver-transmitter:
12.5 to 15 volts dc, 780 ma average.
12.5 to 15 volts dc, 60 ma average.
Frequency.
1.5 to 2.0 watts.
Tone operated by 150-Hz signal.
5 miles (8 kilometers) (varies with conditions).
3 feet long, semi-rigid steel tape.
10 feet long, multi-section whip.
Dry battery BA-386/U, BA-398/U, BA-4386/U,
or nickel cadmium rechargeable battery cassette.
30 hours (with a 9:1 receive-transmit ratio).
Dimensions-4" X 11" X 14" high.
Weight-13.75 lbs.
BASIC COMPONENTS OF THE AN/PRC-77 SERIES RADIOS
RT-841/PRC-77
AN/PRC-77
AN/VRC-64
AN/GRC-160
1
1
1
1
1
AS-1729/VRC
AT-892/PRC-25
1
1
AT-271A/PRC
1
1
AB-591/PRC-25
1
1
ST-138/PRC-25
1
1
CW-503/PRC-25
1
1
H-189/GR
1
1
OA-3633(*)/GRC
1
1
MT-1029/VRC
1
1
ACCESSORY ITEMS
The ST-138/PRC-25 Harness is a cotton duck back pack. It is sewn to secure the receiver-transmitter so that it can be carried on the operatorís
back.
The CW-503/PRC-25 Bag is a sectionalized canvas carrying case used to store the two whip antennas and the handset.
The AT-892/PRC-25 is a one-section, three foot, whip antenna. A spring at its base allows the antenna to be placed in a vertical position no matter
what the position of the receiver-transmitter. It is constructed of steel tape and can be folded for storage.
The AT-271A/PRC is a six section, tubular, folding whip antenna. A stainless steel, plastic-covered cable (or braided plastic cord) under spring
tension is threaded through the sections to keep them together when assembled for operation and prevent their separation or loss when
disassembled. Spring tension is provided by a spiral spring in the base section. An antenna top cap installed on the tip of the antenna provides
protection for personnel.
The AB-591/PRC-25 is an antenna base that will act as a rigid support for the tubular six section antenna.
The H-189/GR Handset contains a dynamic microphone and receiver for transmitting and receiving signals. A push-to-talk switch is mounted in the
handle. The connecting cord is retractile and terminates in a five-pin connector.
associated industries
11347 Vanowen Street, North Hollywood, CA 91605, U.S.A.
Phone: 818•760•1000
FAX: 818•760•1000

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