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Specialized - Photo Tube ·ImageConverterIntensifier

TH9478

Electrostatic or cascaded image-intensifier tube designed for night viewing or specialized ultraviolet/low-light imaging.

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

Description

The Thomson-CSF TH9478 is a 34 mm electrostatic-focus tetrode-type light image intensifier for night vision.

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

No fixed ratings are recorded for this section.

Electron-optical image-intensifier structure; specialized photocathode/focus/screen values retained as parameters.

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

Other

  • Maximum photocathode-to-screen/anode voltage

    18 kV

  • Maximum photocathode current

    0.1 uA

  • Maximum photocathode-to-g1 voltage

    0.4 kV

  • Maximum photocathode-to-g2 voltage

    2 kV

  • Maximum photocathode illumination

    0.5 lux

  • Typical g1 voltage

    0.2 kV

  • Typical g2 voltage

    1.35 kV

  • Typical screen voltage

    16 kV

  • Photocathode sensitivity

    175 to 225 uA/lm

  • Luminance gain

    300 to 400 cd/m2/lux

  • Central resolution

    25 to 30 lp/mm

  • Peripheral resolution

    15 to 18 lp/mm

  • Central magnification

    0.34 to 0.36 x

  • Distortion maximum

    5 %