2-6 Items furnished
2-6.1 Components Installed as part of the radio communications system are listed on the parts list of drawings listed in
Appendix A and In the Components of End Item List in TM 55-1930-209-14&P-20.
2-6.2 Common and bulk items onboard are listed in the Expendable Supplies and Materials List in TM 55-1930-209-
2-6.3 Repair parts and special tools onboard are listed in the Repair Parts and Special Tools List In TM 55-1930-209-
2-7 Items required but not furnished. All required items are furnished.
2-8 Tools and test equipment. Use existing tools and equipment onboard A complete list of tools and test equipment
onboard Is in the Tools and Test Equipment List In TM 55-1930-209-14&P-18.
Section II. Description of operation
2-9 General. Each radio has four main components: antenna, transceiver and speaker, regulated DC power supply, and
microphone When power is turned on, the radio can be used for receiving or transmitting radio messages Receiving and
transmitting radio messages is described in paragraphs 2-9.1 and 2-9.2.
2-9.1 Receiving radio messages. After radio is turned on, the antenna picks up incoming radio waves. These input
radio waves are then converted into sound (audio) output signals to produce words and sounds through the radio
2-9.2 Transmitting radio messages. After the radio is turned on and the microphone push-to-talk button is pressed,
words spoken into the microphone are converted into radio waves in the transceiver. The radio waves are then
broadcast from the antenna for reception by other radio stations.
Section III. Operating instructions
2-10 Operating controls and indicators. Controls and indicators for radio communications system major components
are shown in Figures 2-5 thru 2-9.
2-11 Prestart procedures. The following prestart procedures should be performed by system operator before activating
radio communications system.
Make sure power switches are set to OFF position for all radio system operating equipment.
Be sure proper fuse ampere rating and type are installed in the Army radio power supply. If a
larger ampere-rated fuse is installed, damage to equipment circuitry can occur.
Make sure correct power fuses are installed in the radio equipment specified in the following:
Army radio power supply
Front panel of power supply
ac power cord to radio
In series with power input circuit
from CNB4 ni-cad battery pack
Perform before operation preventive maintenance procedures in paragraph 2-16.