Components

2.

COMPONENTS. The radio set AN/PRC-104 and its components are issued in the transit case (Fig 3),

which is used to store and transport the radio set when it is not in use. The major components of AN/PRC-104 are

secured together by quick-disconnect latches. The electrical connections for the receiver/exciter and the amplifier

are made through built-in connectors on the two components. The electrical connections for the battery pack are

built-in on the amplifier/coupler and the battery pack. The major components of the radio set are:

a. Receiver-transmitter RT-1209. The RT-1209 receiver-transmitter is a miniaturized HF-single

sideband transceiver that provides control of the frequency, mode selection, single sideband (SSB)

transmit/receive switching, and tuning of the radio set. The receiver- transmitter can be operated in the USB or

LSB voice or data modes set at any frequency from 02,000.0 to 29,999.9 MHz in increments of 100 Hz. Audio

connections are provided for a handset, headset, CW key, or data input. The transmitter generates an SSB carrier,

either USB or LSB, of 250 milliwatts (mW). In the receiver-transmitter, received signals are converted and

demodulated to audio signals and are sent to the headset speaker. The transmitter provides frequency control and

transmit/receive control by switching signals to the coupler. It is supplied with 26.5 volts (V) DC power by way

of power amplifier. The receiver-transmitter (RT-1209) and the amplifier/coupler (AM-6874) are installed

together.

b. Radio frequency amplifier 20 watt AM-6874/PRC 104-A (amplifier/coupler). The AM-6874/PRC

104-A is both an amplifier and a coupler. It amplifies signals from the RT-1209 from .25 watt (W) to 20 W and

allows one of three possible antennas to be selected.

c. Battery case CY-7875/PRC-104 (battery pack). The CY-7875/PRC-104 battery case supplies power

to the radio set (Fig 4).

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