AN/ARC-34

The AN/ARC-34 is an airborne UHF communications system, that was used in many U.S. aircraft of the 1950s and 1960s, such as the A-37, B-52, B-57, F-5, F-86, F-100, F-101, F-102, C-130, C-135, C-137, C-140, CH-3, H-43, H-53, T-38, T-39 and U-2.

System Description
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 some models were built by Magnavox.