Control Unit, BC-434-A, of SCR-269 Automatic Radio Compass, B-17, B-24, B-29 JU-88 made by Manning Maxwell and

made by Manning Maxwell and Moore

as used in the WW2-era US Navy's Consolidated PBY Catalina Patrol Bomber / Seaplane (see photo of PBY Instrument Panel from the Pilots Flight Manual with a yellow dot showing instrument location)

Not for the feint of heart

Being partially a gyro instrument it has

Control Unit, BC-434-A, of SCR-269 Automatic Radio Compass, B-17, B-24, B-29 JU-88 made by Manning Maxwell andThis is a fine example of a BC 434 A Remote Control Box for the aircraft receiver BC 433 of the Radio Compass SCR 269 system for direction finding and homing. The receiver function tunes from 200 1750 kHz across 3 bands, which were selected by rotating the center knob below the frequency band window. The center knob rotates a flexible shaft connected to a rotatable loop antenna. The SCR 269 system (see diagram), as installed in an aircraft such as the