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The output meter for radio receivers "Ð’3-10Ð" (ИВП-3Ðœ) has been produced since 1962 by the Minsk plant "Caliber". The device is designed to measure the signal voltage and noise at the output of radio receivers and low frequency amplifiers. The limits of the measured voltages from 30 mV to 300 volts. The frequency range from 50 to 10,000 Hz. Basic error / - 4% of the upper limit of the scale. Input impedance is 20 kΩ. The device is powered from a KBS-X-0.7 (3R-12) battery, and the consumption does not exceed 5 mW. Dimensions of the device 160x120x115 mm. Its weight is 2 kg. In 1969, the design of the device was improved.