Ground / Manpack Communications
  Vehicular Intercom Systems
  AM4700 R.F. Power Amplifier
  AN/GRC-160 & AN/VRC-64 Vehicular Radio Sets
  AN/VRC-6550 Vehicular & Fixed Station Communication Systems
  AN/VRC-12 Series Radio Sets
  AN/VIC-1 Intercom System
  DH-132S & DH-132AS CVC Helmets
  AS-1729/VRC Antenna
  DH-133A CVC Helmet
  Field & Wire Communications

AN/GRC-160 and AN/VRC-64


Providing reliable VHF/FM two-way communications. Bases to vehicles, between vehicles, (personnel carriers and tanks included) and soldiers in the field.

Being adaptations of the tactical Radio, AN/PRC-77, operating in the 30-76 MHz range, the two Radio Sets are fully compatible with most military radios in the frequency range 30-76 MHz including AN/VRC-12 and VRC-43 through 49, PRC-68, VRC-54 and ARC-131, and others.

The AN/VRC-64 is the vehicular version of the RT-841/PRC-77 portable Radio Set, consisting of: Receiver-Transmitter mounted on the Amplifier-Power Supply Group OA-3633/GRC. It also includes the AS-1729/VRC Vehicular Whip Antenna.

  The AN/GRC-160 consists of an AN/PRC-77 Radio Set, including all the vehicular components covered above and as noted in the AN/VRC-64 as well as all standard Manpack accessory items. Full manpack and Vehicular communications capability is thus assured, since the AN/PRC-77 can be removed and readily used as a battery-operated Manpack Unit/ when returned and mounted back onto the OA-3633/GRC, vehicular operation resumes.

The OA-3633/GRC serves to convert 24 VDC nominal vehicle's battery power to 12.5 to 15 volts DC required by the AN/PRC-77 Radio, and contains an audio amplifier for received signals. Manually selected Antenna matching
circuit, a loudspeaker, connectors and operating controls built in.

The AS-1729/VRC Antenna center-fed whip can operate over the 30-76 MHz range, at power levels up to 70 watts. Its primary application is to replace Antenna AT-912/VRC in the following Radio Sets: AN/VRC-12 series, AN/VRC-53 or AN/VRC-64, and GRC-160. It can also extend the communication range in Radio Sets AN/PRC-25 and AN/PRC-77.

MT-1029/VRC Vehicular Mount is used to mount the amplifier-power supply to the vehicle. The mount contains a junction box with connectors to provide distribution of power, control and signal voltages between the amplifier-power supply and other components in the system. A connector on the front of the junction box mates with a connector at the rear of the amplifier-power supply. Three additional connectors at the bottom of the junction box provide for connecting the system's power and control cables.

AM-4700 RF Booster Amplifier is a linear Mode RF Booster Amplifier designed to operate with and attached mechanically to any Military VHF Transceiver. The RF Power Output is a nominal 50 Watts CW with a nominal gain of +13 dB operating into 50 Ohms (Pin - 2.5 Watts; Pout = 50 Watts) with +26 VDC applied. Because the basic amplifier design is linear, the unit will operate with input drive levels over the range of 1 Watt to 5 Watts while maintaining about 13 dB gain.


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