Lamp millivoltmeter `` V3-13 ''.
Instruments for adjusting and controlling the PTA.The V3-13 tube millivoltmeter has been produced since 1967 by the Punane-RET plant. The lamp millivoltmeter is designed to measure the effective value of sinusoidal alternating voltages from 0.5 mV to 300 V in the frequency range from 20 Hz to 1 MHz. Read more about the device below, in the instructions.
