Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Photo Tube ·ImageConverterIntensifier

THX458

Compact electrostatic image intensifier with S20 photocathode for residual-light night-vision equipment.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
-

Description

The THX458 is a compact electrostatic image intensifier with an S20 photocathode, intended for night-vision equipment operating under residual light.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
-
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

ImageConverterIntensifier

X-ray radiationInterelectrode capacitances
Max plate voltage
18000 V

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

1972 Thomson CSF

Published operating points and test conditions from this source.

SECTION 1

ImageConverterIntensifier

Characteristic

  • Photocathode-Screen Voltage Maximum

    18 kV

  • Photocathode-Focus Electrode Voltage Maximum

    2 kV

  • Nominal Photocathode Voltage

    -16 kV

  • Photocathode Sensitivity Minimum

    150 uA/lm

  • Photocathode Sensitivity Typical

    200 uA/lm

  • Central Resolution Typical

    60 lp/mm

  • Input Illumination

    1 lux