Beacon Radio Receiver BC-1206-C, Model 524 A-30 The Compensating directional adjustment module

The Compensating directional adjustment module should be located directly beneath the body of the compass

which is available to download here

its use in the aircraft evidenced by the dog-eared binder and some pages

Sperry part number 644836

The lamp unit is removed by depressing a small button on the bottom of the housing

Beacon Radio Receiver BC-1206-C, Model 524 A-30 The Compensating directional adjustment moduleThe WWII era Beacon Receiver BC 1206 (with 3 manuals), often categorically called "Detrola", is a small airborne superheterodyne receiver with frequency range of 200 400 KC for receiving signals from ground based transmitters within a range of 150 miles. They could also receive voice transmissions, according to the documentation included in this listing. In the photo gallery, see the location of the receiver on the right side of the cockpit in a P 47