Ground / Manpack Communications
  AN/PRC-1177 Tactical Radio Set
  H-161E/GR Headset-Microphone
  Vehicular Intercom Systems
  Field & Wire Communications


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.
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.
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