Sound frequency generator '' GZ-2 '' (ZG-10).
Instruments for adjusting and controlling the PTA.The GZ-2 audio frequency generator was presumably produced since 1954. The same generator, but under the name "ZG-10", was presumably produced since 1958. The sound frequency generator "GZ-2" is intended for use as a source of sinusoidal electrical oscillations of sound (low) frequency. The device is designed for use in laboratory conditions and repair shops. The range of all generated frequencies is 20 ... 20000 Hz, divided into three sub-ranges: 20 ... 200; 200 ... 2000 and 2000 ... 20,000 Hz. Frequency setting error ± 2%. Frequency drift after 30 min. preheating for the first hour of operation no more than ± 0.4%; for the next seven hours of operation, the additional frequency drift is not more than ± 0.4%. Normal output power 0.5W, maximum 5W. The maximum output voltage at a matched load is 150 V. The change in the output voltage is carried out smoothly, as well as in steps of 1 dB from 0 to 110 dB using two dividers: the first - after 10 dB from 0 to 100 dB, the second - after 1 dB from 0 to 10 dB. The output impedance of the device is designed for matched loads of 50; 200; 600 and 5000 ohms. Nonlinear distortion factor: at normal output power below 0.7%; at maximum output power below 1.5%; at maximum output power at 5000 Ohm load below 2%. The unevenness of the frequency response relative to the readings at a frequency of 400 Hz: at maximum output power and at all loads at frequencies from 50 to 10,000 Hz, no more than ± 1 dB, at frequencies from 20 to 20,000 Hz, no more than ± 3.5 dB; at normal output power at a matched load of 600 Ohm at frequencies from 50 to 10,000 Hz no more than ± 0.5 dB, at frequencies from 20 to 20,000 Hz no more than ± 1.5 dB. The indicator scale calibration error at a frequency of 1000 Hz at voltages up to 60 V does not exceed ± 5%. The device is powered from an alternating current with a frequency of 50 Hz, voltage of 127 or 220 V. Power consumption is not more than 150 VA. The dimensions of the device are 598x357x293 mm. Its weight is 35 kg.
