Sound generator `` GZ-1A ''.

Instruments for adjusting and controlling the PTA.The sound generator "GZ-1A" has been produced since 1952. It is one of the first mass-produced domestic sound generators. In 1957, the generator was modernized and became known as "GZ-1M", and since 1962 simply "GZ-1". In 1966, another modernization with the same name (the last image from the reference book), but it was already a completely different ZG, there is no data on it. All audio generators are designed for use as sources of sinusoidal audio frequency voltage in laboratories, factories and repair shops. Technical characteristics of generators (except for the 1966 series): The range of the generated frequencies "GZ-1" and "GZ-1M" - 18 ... 18000 Hz. "GZ-1A" - 25 ... 17000 Hz. The sub-bands "GZ-1" and "GZ-1M" 1 - 18 ... 180 Hz, 2 - 180 ... 1800 Hz, 3 - 1800 ... 18000 Hz. "GZ-1A" - 1 - 25 ... 130 Hz, 2 - 130 ... 700 Hz, 3 - 700 ... 3600 Hz, 4 - 3600 ... 17000 Hz. All generators have a frequency margin at the edges of the subbands of ~ 10%. The error in setting the audio frequency is ± 5%. Output power at a load of 600 ohms is not less than 1 W. The limits of adjustment of the output voltage are 0 ... 25 V. The maximum coefficient of nonlinear distortion is not more than 2%. Frequency response unevenness over the entire frequency range ± 2 dB. Power supply - network 50 Hz / 127, 220 V. Power consumption from the network is no more than 75 VA. The overall dimensions of the device are 360x300x210 mm. Weight 16 kg.