1. Setup the radio set and establish communication with a distant station before removing.

2. Ensure the Radio Control Group AN/GRA-39 is complete and that 12 BA-30s and field wire are available.

3. Installation of the batteries requires the following procedures:

l For the local control unit (C-2329):

a. Unsnap the two rear clamps and remove the rear cover.

b. Install the size BA-30 batteries according to instructions on the rear of the case.

c. Replace the rear cover and clamp it.

d. Locate the local control unit near enough to the radio so the audio connector cord can reach it.

l For the remote control unit (C-2328):

a. Perform the procedure in (a) through (c) above.

b. Position the remote control unit as required (up to 2 miles from the local control unit).

4. To make appropriate connections, you must ensure the procedures indicated below are followed carefully:

l For the local control unit (C-2329):

a. Remove the radio connector from the retaining clip on the front panel.

b. Connect the radio connector to the audio connector of the radio set; ensure proper connection is made.

c. Strip the insulation from the field wire (1/2 inch) and connect the wire to the binding posts by pressing the post down, inserting the wire into the slots provided, and releasing the posts.

d. Connect the handset from the radio set to the local control unit.

. For the remote control unit (C-2328):

a. Strip the insulation from the ends (1/2 inch) and connect the wire to the binding post by pressing the posts down, inserting the field wire into-the slots provided, and release.

WARNING

DO NOT PRESS THE RINGER BUTTON WHILE CONNECTING THE FIELD WIRE TO THE LINE BINDING POSTS.

b. Connect the handset provided with the AN/GRA-39, to the audio connector ensuring a secure connection.

OPERATING PROCEDURES.- Perform the following actions:

l For the local control unit (C-2329):

a. Turn the POWER switch ON.

b. Set the BUZZER VOLUME/LAMP (the one desired) near mid-range.

l For the remote control unit (C-2328):

a. Turn the volume control to mid-range.

b. Set the BUZZER VOLUME/LAMP (the one desired) to near mid-range.

The Radio Set Control Group AN/GRA-39 provides

three types of operation:

1. Telephone communications between remote and local control unit operation.

a. Press the ringer button on the front panel several times to gain the attention of the other operator.

b. Set the remote control unit TEL/RAD/RAD-SPKR switch to TEL.

c. Turn and hold the local unit TEL/REMOTE/RADIO switch to TEL.

d. Press the handset press-to-talk switch to talkto the other operator, release to receive.

2. Radio set transmission and reception from the local unit.

a. Set and hold the TEL/REMOTE/RADIO switch to RADIO.

b. Press the handset press-to-talk switch to transmit, release to receive.

3. Radio set transmission and reception from the remote control unit.

a. Set TEL/REMOTE/RAD1O switch on the local control unit in the remote position.

b. Local operator adjust volume on radio set for a comfortable listening level.

c. Set the TEL/RAD/RAD-SPKR switch on the remote unit to RAD or RAD-SPKR.

d. Adjust the volume control to the desired listening level.

Figure 11-12.-Antenna equipment RC-292, components and spare parts.

e. Press the handset push-to-talk switch to transmit; release to receive.

f. If chatter (a motor boat sound) is heard in the speaker or handset, turn the volume down on the radio set and re-adjust the volume from the remote control unit.

The three operating procedures described above should be applied each time the AN/GRA-39 is put into operation, because it allows the operator to hold a complete operational check of the Radio Set Control AN/GRA-39.

SECURING PROCEDURE.- To secure the AN/GRA-39, perform the following actions:

1. Turn the power switches to OFF on both units.

2. Remove the batteries.

3. Disconnect the wires, handsets, and radio connector.

4. Store all components in the carrying bag and return it to storage after preventative maintenance has been performed by the operator.