Beat frequency oscillator type 1022 serial no. 125809
- Made:
- 1960-1979 in Copenhagen
Beat frequency oscillator type 1022 serial no. 125809, made in Denmark by Bruel & Kjaer, Copenhagen, range 20Hz to 20kHz
Details
- Category:
- Acoustics
- Object Number:
- 1992-845
- credit:
- Civil Aviation Authority. Chief Scientis