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Specialized - Photo Tube ·PhotoemissiveDetector

20PA91

Vacuum silver-cesium phototube sensitive to visible and infrared radiation for photoelectric measurement equipment.

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

Description

Vacuum silver-cesium phototube sensitive to visible and infrared radiation, intended for photoelectric measurements and related equipment.

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

PhotoemissiveDetector

X-ray radiationInterelectrode capacitances
Max plate voltage
500 V

Published ratings and characteristics promoted from the source where directly stated.

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 Tesla

Published operating points and test conditions from this source.

SECTION 1

PhotoemissiveDetector

Characteristics

  • Spectral sensitivity maximum

    8500 angstrom

    Published range 8000-9000 angstrom

  • Sensitivity

    10 to 15 uA/lm

    Visible/infrared phototube