INSTALL AND OPERATE RADIO SET AN/PRC-104
Upon completion of this lesson, you will be able to install and operate radio set AN/PRC-104
This lesson is based on the contents of TM 11-5820-919-12 and other materials approved for US Army
instruction. However, development and progress render the text continually subject to change. Therefore, base
your examination answers on material presented in this lesson rather than on individual or unit experience.
INTRODUCTION. This lesson will provide you with step-by-step instructions needed to properly install
and operate radio set AN/PRC-104. The radio set and its components are contained, transported, and stored in
radio set case CY-8291/PRC-104 (transit case). The transit case normally should be kept closed. To unpack the
equipment, unfasten the four latches and remove the transit case cover. Each of the individual pieces of
equipment fits in a molded space. Upon receiving this radio set, check that the equipment is complete and inspect
the equipment for any damage incurred during shipment. In this lesson, you also will learn where the operator's
controls and indicators are, what they do, and how to make required settings for operation. Finally, you will learn
how to do an initial operational check of the radio set.
ASSEMBLING PROCEDURES. Before you can operate a radio set, it must be installed, so you will install
the radio set first. To see how the radio set is to be assembled, see Figure 6.
a. Press the pressure relief valve button to equalize pressure before unlatching transit case, and then
unfasten the four latches securing the cover to the transit case and remove the cover.
b. Remove the receiver/transmitter-amplifier/coupler combination from the transit case, and assemble
them together. Ensure that the connectors on the two pieces are completely engaged by pressing the two together
from the ends. Secure the two together by using the quick-disconnect latches located on the front and the rear of
the amplifier/coupler. Tighten the latches until they are snug.
c. Attach the battery pack to the bottom of the receiver/exciter and the amplifier/coupler. You must
make sure that the connectors on the battery pack and the amplifier/coupler are lined up. This is where the
electrical connections are made for the battery. Secure the assembly by using the quick-disconnect latches on the
battery pack. There are two of them.
d. Next, you should assemble the whip antenna. Screw the antenna base (shock mount) to the whip
antenna, and then screw this assembly to the radio set at the antenna socket.
e. Connect a handset to the radio set audio connector.