Radio Set Control Group AN/GRA-39 (fig. 11-9) provides the capability of remotely controlling a radio set up to a distance of 2 miles, using standard field wire. Remote control allows us to operate the radio set at the desired installation, yet locate the radio set in the best position for more efficient communication between the remote and the local control unit operators. It also provides a buzzer system so the operators may alert one another. The major components of the AN/GRA-39 are the local control unit and the remote control unit.

1. BAG CW-598: Used for storage and trans-portation of the AN/GRA-39.

2. Sling, carrying bag, and case: Used for trans-portation of the bag.

3. Auxiliary sling: Used for carrying either the remote or the local receiver/exciter unit separately.

4. Control Group C-2328: Used to transmit or receive over the remote radio set.

5. Control Group C-2329: Connects to the radio being remoted. Connects on the radio audio connector.

Figure 11-10.-Remote control unit C-2328/GRA-39.

Figure 11-11.-Led control unit C-2329/GRA-39.

6. Handset H-189/PT: Allows an operator to receive and transmit voice communications through a radio.

REMOTE CONTROL UNIT.- The remote con-trol unit (fig. 11-10) allows the operator at the remote site to transmit or receive through a radio set from a distance of up to 2 miles. The power supply (six BA-30s) for the remote control unit has a life expectancy of 24 hours.

LOCAL CONTROL UNIT.- The local control unit (fig. 11-11) is of the same general construction as the remote control unit. The local control unit is connected to the remote control unit by field wire. The local control unit is connected to the radio set being remote with the audio connector. The power supply, composed of six BA-30s, for the local control unit has a life expectancy of 72 hours.