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Specialized - Cathode Ray ·CathodeRay

8LO39V

Russian cathode-ray instrument tube for visual registration of electrical processes, with manufacturer-defined electron-optical focusing, deflection, and accelerating-voltage characteristics.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
0
Nominal heater
6.3 V / -

Description

The 8LO39V is a electrostatic cathode-ray indicator tube.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
0
Nominal heater voltage
6.3 V
Nominal heater current
-
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Full electrical-data audit completed for this tube.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

195X Russian

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Heater voltage

    5.7 to 6.9 V

    Published operating range

  • First anode voltage

    1100 V

    Maximum

  • Second anode voltage

    1500 to 2000 V

    Published range

  • Third anode voltage

    3000 to 4400 V

    Published range

  • Cathode-heater voltage

    -125 to 0 V

    Published range

  • Modulator voltage

    -200 to 0 V

    Published range

  • Deflection plate differential voltage

    -550 to 550 V

    Relative to second anode

Characteristics

  • Focused line width

    1.1 mm

    Maximum

  • Modulation voltage

    50 V

    Maximum

  • Afterglow duration

    0.2 s

    Maximum

  • Screen brightness

    40 cd/m2

    Minimum