Average voltmeter `` Ф5053 ''.
Instruments for adjusting and controlling the PTA.The average voltmeter "F5053" was produced presumably since 1977. Electronic voltmeter Ф5053 with a pointer reading, is designed to measure alternating voltages of various shapes in the frequency range from 10 Hz to 4 MHz, from 0 to 300 volts (6 limits).
