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Specialized - Photo Tube ·ImageConverterIntensifier

PF253KC

Rugged three-stage fibre-optic image intensifier with S25 extended-red photocathode, internal high-voltage supply, and automatic brightness control.

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

Description

The PF253KC is a ruggedized three-stage image-intensifier assembly with fibre-optic input/output faceplates, an S25 extended-red photocathode, P20 screen, internal high-voltage supply, and automatic brightness control.

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
7000 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

1962 ITT

Published operating points and test conditions from this source.

SECTION 1

ImageConverterIntensifier

Other

  • Input Voltage Maximum

    7 V

  • Input Current Maximum

    50 mA

  • Screen Luminance Maximum

    500 cd/m2

  • Average Photocathode Illuminance Maximum

    0.005 lux

Characteristic

  • Nominal Performance Input Voltage

    6.75 V

  • Input Current Typical

    30 mA

  • Useful Cathode Diameter Minimum

    23 mm

  • Photocathode Type

    S25 extended-red

  • Photocathode Luminous Sensitivity Minimum

    175 uA/lm

  • Photocathode Radiant Sensitivity at 800 nm Minimum

    12 mA/W

  • Photocathode Radiant Sensitivity at 850 nm Minimum

    6 mA/W

  • Center Resolution Minimum

    28 lp/mm

  • Edge Resolution Minimum

    25 lp/mm

  • Paraxial Magnification Typical

    0.84

  • Distortion Typical

    18 percent

  • Luminance Gain Minimum

    35000

  • Operating Temperature Range

    -54 to +52 C