AN~PRC-77

Purpose and Use

Radio Set AN/PRC-77 is a man-pack, portable, frequency-modulated (fm) receiver-transmitter used to provide short-range, two-way, radio-telephone voice communication. Receiver-Transmitter, Radio RT-841/PRC-77 is also used as part of Radio Sets, AN/VRC-64 and AN/GRC-160 (TM 11-5820-498-12).

Technical Characteristics

Frequency range

Low band

30.00 to 52.95 MHz ±3.5 kHz.

High band

53.00 to 75.95 MHz ±3.5 kHz.

Number of channels

920

Channel spacing

50 kHz

Types of transmission and reception

Transmission . . . .

Voice (300 to 3,500 Hz) and 150 Hz squelch tone

Reception . . . . . .

Voice (no squelch) or voice and 150 Hz squelch tone

Security or digital data equipment

Wideband (10 to 20,000 Hz) without 150 Hz squelch tone

Transmission and reception

power requirements:

Transmission

12.5 to 15 vdc,780 ma average

Reception

12.5 to 115vdc, 60MA average

Type of modulation

Frequency.

Transmitter output power

1.0 to 4.0 W

Type of squelch

Tone operated by 150 Hz signal

Distance range

5 mi (8 km) (varies with conditions)

Additional Files

TM 11-5820-667-12

OPERATOR’S AND ORGANIZATIONAL MAINTENANCE MANUAL

RADIO SET

AN/PRC-77 (NSN 5820-00-930-3724)

(Including Receiver-Transmitter, Radio RT-841 /PRC-77) (NSN 5820-00-930-3725)

1 January 1987

PRC-77 Interconnection Diagram

PRC-77 Mechanism Exploded Views

EMP Hardening Investigation of the PRC-77 Radio Set

J.S. Seregelyi, C. Gardener, J.A. Walsh and R. Apps

Defence Research Establishment Ottowa

February 1993