Vehicle Mounted PRC-77 Sets

[rob love]

It's like splitting hairs really. The 25 and the 77 were not identical radios according to this site:

http://www.olive-drab.com/od_electronics_anprc25.php

AN/PRC-25 and AN/PRC-77 in Other Configurations

There were three basic configurations of the PRC-25: starndard manpack, vehicular (called AN/VRC-53 in that configuration), and dual manpack or vehicular (AN/GRC-125 configuration). The PRC-77 also had these combinations available, but with different nomenclature as explained in the following.

AN/VRC-53 components AM-2060 Power Supply and Mounting Tray
AM-2060 Power Supply and Mounting Tray. Click image for view of complete AN/VRC-53 system.

AN/VRC-53 Radio System refers to RT-841/PRC-25 when installed in the AM-2060 Audio Amplifier/Power Supply and connected to the AS-1729/VRC Vehicular Whip Antenna. The MT-1029 Vehicle Mount is used to install the AM-2060 in a vehicle. The MT-1029 also supports use of the VIC-1 Vehicle Inter-Communication system.

AN/VRC-125 dual purpose system (vehicular or manpack) includes the vehicle set up as above, plus the ST-138 web suspenders back pack, battery set and the CW-503 accessories bag.

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.

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. The AN/PRC-77 can be removed from the vehicle and used as a battery-operated Manpack Unit and later returned and mounted back onto the OA-3633/GRC resuming vehicular operation.

So the jist of it is a 25 in the AM 2060 tray (along with the remainder of the installation) is a AN/VRC53, whle a 77 in the 2060 tray with IKEE is a AN/GRC-160. The AN/GRC 125 is a AN/VRC53 setup with the regular manpack components issued alongside.

Thank god I use a 524 set so I don't have to remember all this.