Rare! Vintage Lamp Device Made in USSR Oscilloscope/Oscillograf Original! LO-70.A rare lamp device in working order for radio amateurs and radio professionals. Graduated from 1967, Saratov Electrical Instrument Plant named after Ordzhenikidze. Tube oscilloscope. Size: Length-10.6; Height-6.7; Width - 4.3 inches; Weight - 8.66 lbs. The oscilloscope is designed to monitor and control the forms of electrical oscillations, as well as for tuning amplifiers and low-frequency generators, troubleshooting TVs and radios. BRIEF INSTRUCTIONS! On the front panel of the device there are: 1) Beam change brightness control; 2) Regulator of the beam movement on the device; 3) Vertical signal gain control; 4) Input jack for connecting the studied low-frequency signal; 5) Sweep frequency regulator smoothly; 6) Frequency range switch; 7) Socket for connecting a separate signal that synchronizes the sweep; 8) Synchronization adjustment knob; 9) The regulator of the movement of the beam horizontally; 10) Focus control;