Amperevoltommeter `` Ts-437 ''.

Instruments for adjusting and controlling the PTA.Amperevoltommeter "Ts-437" has been produced since 1964. An amperevoltmeter is a combined device designed to measure current and voltage in DC circuits, DC resistance, effective sinusoidal voltage rms value in AC circuits with a frequency from 45 to 40,000 Hz. The device is intended for use in the operation of radio equipment and communication facilities, as well as radio amateurs.