Sound generator `` ZG-2A ''.
Instruments for adjusting and controlling the PTA.The sound generator "ZG-2A" was produced presumably since 1948. The sound generator "ZG-2A" is designed for checking and adjusting household radio equipment. The range of generated frequencies from 0 to 20,000 Hz is divided into 8 sub-bands. The low-frequency signal from 0 to 20 kHz is the difference frequency from the beat of the frequencies of two high-frequency generators, one reference and one with a smooth frequency tuning.
