AN/ARC-34
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The ARC-34 was a military UHF AM radio that operated between 225.0-399.9 MHz and transmitted at 8 watts. It featured a separate guard receiver for monitoring 243 MHz, while simultaneously monitoring the active channel selected. The unit was unpressurized, but a pressurized version, designated AN/ARC-133, could operate at altitudes up to 50,000 feet. The radio system was designed by RCA, but Magnavox built some models.[3]
In accordance with the Joint Electronics Type Designation System (JETDS), the "AN/ARC-34" designation represents the 34th design of an Army-Navy airborne electronic device for radio communications equipment. The JETDS system also now is used to name all Department of Defense electronic systems.