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Specialized - Photo Tube ·PhotoemissiveDetector

1P35

Gas-filled two-electrode phototube using an S-1 photosensitive cathode for optical detection.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B12A
Base pins
3
Nominal heater
-

Description

Gas-filled two-electrode phototube with S1 photosensitive cathode.

Socket description

Duodecal 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B12A
Base pins
3
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
90 V

Gas-filled phototube represented as SectionType=Other.

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

1963 Rauland

Published operating points and test conditions from this source.

SECTION 1

PhotoemissiveDetector

Characteristic

  • Luminous sensitivity

    125 uA/lm

    90 V

  • Maximum gas amplification

    10

  • Wavelength of maximum response

    8500 angstrom

Other

  • Maximum dark current

    0.1 uA

    90 V

  • Maximum average cathode current

    2 uA

  • Maximum anode voltage

    90 V

Capacitance

  • Interelectrode capacitance

    1.5 to 4 pF