CRT oscilloscope tube 3LO1I  is made in USSR New, old stock.


Video and photo made with Tesla coil to show that tube is hermetic(have vacuum inside) and ready to use! Last photo was took from internet DIY phorum how to drive this tube.

Cathode-ray tube 3LO1I has electrostatic focus and deflection of the electron beam, with a round screen, green
phosphor, and an aver age persistence, intended for monitoring electronic processes by visual observations in
different radio and  technical devices.

Basic technical specifications

• Heater voltage ............................................................................. 6,3V

• Heater current.............................................................................. 0,54 ... 0,66A

• 2nd anode voltage ....................................................................... 500V

• 1st anode voltage correspond to best focus................................. 0 ... 50V

• Cut-off voltage ............................................................................ -90 ... -30V

• Diameter of tube (no more than)................................................. 33,5mm

• Length of tube (no more than) .................................................... 115mm

 

Maximum operational values

• Heater voltage ............................................................................. 5,7 ... 6,9V

• 2nd anode voltage ....................................................................... 500 ... 800V

• Max 1st anode voltage ................................................................ 150V

• Control grid voltage .................................................................... -125 ... 0V

• Heater-cathode voltage ............................................................... -125 ... 0V

• Impedance in control grid circuit, no more than.........................1,5MΩ

•Impedance in any defl ection plate circuit at 50Hz, no more than 2MΩ

•Voltage between any deflection plates and 2nd anode ............... -450 ... 450V