Skip to main content

Specialized - Photo Tube ·PhotoemissiveDetector

90CG

Gas-filled cesium-on-oxidized-silver phototube with strong red and infrared sensitivity for photoelectric detection.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
Miniature
Socket code
B7G
Base pins
-
Nominal heater
-

Description

Gas-filled phototube with cesium-on-oxidized-silver cathode, sensitive to red and infrared radiation.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
Miniature
Socket code
B7G
Base pins
-
Nominal heater voltage
-
Nominal heater current
-
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Miniature - 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

PhotoemissiveDetector

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Published ratings and characteristics promoted from the supplied Philips source.

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

1957 Philips Receiving and Amplifying Tubes

Published operating points and test conditions from this source.

SECTION 1

PhotoemissiveDetector

Characteristic

  • ProjectedSensitiveArea

    2.4 cm2

  • CathodeMaterial

    Cesium on oxidized silver

Other

  • OperatingAnodeVoltage

    85 V

Data set 02

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

PhotoemissiveDetector

Characteristics

  • Projected sensitive area

    2.4 cm²

    Published datasheet value

  • Maximum dark current

    - to 0.1 µA

    Published datasheet value

  • Luminous sensitivity

    125 µA/lm

    Published datasheet value

  • Anode-cathode capacitance

    1.1 pF

    Published datasheet value

  • Spectral response

    red and infra-red

    Published datasheet value

Other

  • Operating anode voltage

    85 V

    Published datasheet value

  • Maximum anode voltage

    - to 90 V

    Published datasheet value

  • Load resistance

    1 MΩ

    Published datasheet value

  • Maximum ambient temperature

    - to 100 °C

    Published datasheet value

Construction

  • Filling

    Gas-filled

    Published datasheet value