AIRCRAFT RADIO CORPORATION (ARC) Test Unit #15990

Circa Late 1950's to Mid 1960's (ESTIMATED)

This unit was used to service and calibrate aircraft radios, which operated on specific frequency bands. Different test procedures required the unit to operate across various frequency ranges. The interchangeable discs allowed technicians to physically swap the calibration scale to match the precise operating frequency band of the specific radio system being tested (e.g., VHF or LF).

(H-16.5cm x W-18cm x D-11cm)