US Buyers: Please Note

All orders ship DDP (Delivery Duty Paid).

This means:

  • No import taxes
  • No customs fees
  • We cover all import duties for fast & smooth delivery

Note: Sales tax may apply at checkout depending on your state.

(this is separate from customs duties)

5LO38I Soviet CRT Oscilloscope Tube Green Mini 50mm / 2"

Made in USSR. New, Old Stock

This high-quality Soviet-era 5LO38I (5ЛО38И) cathode-ray tube was manufactured in December 1976, complete with its original factory box, authentic technical passport, and OTK quality stamp. 

Featuring a classic 53mm (2-inch) round screen with a vibrant green phosphor glow, it is a prized find for vintage electronics enthusiasts and DIY builders. It serves as an excellent component for ham radio projects and custom test equipment, and it is particularly popular for building unique, retro-futuristic oscilloscope clocks—including both digital displays and creative vector-graphic analog clock faces.

The base pinout diagram and full connection schematic can be found in the image gallery alongside the general views.

Technical Data:

  • Filament voltage: 6.3 V
  • Filament current: 0.54 to 0.66 A
  • Second anode voltage: 1000 V
  • Focusing voltage: 138 to 300 V
  • Cutoff voltage: -90 to -30 V
  • Upper plates deflection sensitivity: 0.09 to 0.14 mm/V
  • Lower plates deflection sensitivity: 0.11 to 0.16 mm/V
  • Maximum screen diameter: 53 mm
  • Maximum tube length:194 mm
Maximum Ratings:
  • Filament voltage: 5.7 to 6.9 V
  • Second anode voltage: 500 to 1100 V
  • Maximum first anode voltage: 550 V
  • Voltage between any plate and second anode: -660 to 660 V
  • Modulator circuit resistance: 1.5 MOhm
  • Deflection plate impedance at: 50 Hz 1.0 MOhm
  • Heater to cathode voltage: -125 to 0 V

We combine multiple items to save on shipping!


Shipping and Handing

Buyer pays fixed shipping costs including insurance for any country. Shipping costs for this item can be found in the section Shipping and Payments. This item will be shipped to you from Europe (Ukraine) by Registered Airmail after payment is received and verified.

...