RT-1319/URC Magnavox Receiver-Transmitter

The Magnavox RT-1319/URC Receiver-Transmitter (RT) is a two band UHF and VHF Amplitude Modulation (AM) receiver-transmitter. It is a major component of the AN/PRC-113(V), AN/VRC-83(V) and AN/TRC-176. When the RT is configured in the AN/VRC-83(V) it also provides UHF and VHF band communications for the AN/GRC206(V).

The RT operates on frequencies selected from 7000, 25 kHz spaced UHF channels (225.000 MHz through 399.975 MHz) and 1360, 25 kHz spaced VHF channels (116.000 MHz through 149.975 MHz).

The RT is controlled by front panel controls and keyboard or radio set control units interfaced to the front panel REMOTE connector.

Local control of the RT is accomplished by input keying through the keyboard matrix. This controls all RT functions except OFF-VOLUME, squelch (SQL) adjust, and the illumination level (DIM) of the display. These functions are adjusted by manual rotary controls. Front panel connectors are provided for connection of a VHF or UHF 50 ohm antenna, an audio connector compatible with the H-250/U handset or H-157/AIC headset and secure voice devices. Local control by means of keyboard entries permit the following: manual selection of frequency, programming any combination of up to eight preset channel frequencies, selection of any of the preset channels, guard receiver on/off, main receiver squelch on-off, direction finding (DF) tone on-off, two-watt or ten-watt transmit power mode selection, clearing of incorrect entries, and entry of frequency or relighting of display after battery saver turnoff.

The RT contains two receivers, the main receiver and the guard receiver. The main receiver is a voice, tone, or secure voice, dual conversion amplitude modulated (AM) receiver. The guard receiver is a voice or tone, single conversion AM receiver operating at the single input frequency of 243.000 MHz.

The transmitter is capable of voice, tone or secure voice AM transmission output within the frequency bands. When modulated at 90 + 5%, output power may be selected at either 2 or 10 watts.

The dc supply voltages required by the RT derived from a battery pack, vehicular +28 Vdc supplies or ac/dc supplies capable of supplying +28 Vdc at the required current levels. Input power to the RT is routed through the two connectors located on the rear of the case. The two connectors are electrically isolated by diodes. During battery operation the diodes prevent charging/ discharging from one battery to the other and protect against accidentally applying the wrong power source polarity.