Control Unit, C-149/ARN-6 Radio Compass System B-36 It has a serial #

It has a serial # prefix of AF49

likely indicating a manufacturing year of 1950

as well as confirmation of the part number below the illustration

with the small "V" pointed toward the front of the airplane

but the stamped service date is illegible

Control Unit, C-149/ARN-6 Radio Compass System B-36 It has a serial #This is a terrific example of a C 149 Control unit for the aircraft receiver R 101 of the Radio Compass AN ARN 6 system for direction finding and homing. The receiver function tunes from 100 1750 kHz across 4 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 AN ARN 6 system evolved over time, originally using a control box similar