Control Unit, BC-434-A, of SCR-269 Automatic Radio Compass, B-17, B-24, B-29 JU-88

Control Unit, BC-434-A, of SCR-269 Automatic Radio Compass, B-17, B-24, B-29 JU-88This 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

The scale is labeled to a value of 2

25 inches square by ~7

It is in very nice condition given its age

made by Hoffman

The data label indicates that it was made for Bureau of Aeronautics US Navy ("Bu Aero USNavy") and it has the stamped anchor symbol of the USN on its rear

The caging knob at the lower right corner would either capture the gyro in a fixed position i

made by Manning Maxwell and Moore

Not for the feint of heart

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)

FW190 A5-6

Being partially a gyro instrument it has

The USAF type is S3A