Oscilloscope "KO-3".
Instruments for adjusting and controlling the PTA.Oscilloscope `` KO-3 '' has been produced since 1945. Oscilloscope "KO-3" is designed for visual examination of AC voltages in the frequency range from 15 Hz to 500 kHz. Screen glow color - green. The oscilloscope is designed to work with a camera for fixing the signals under investigation on the photosensitive plates.