1P31

Gas-filled two-electrode S-1 phototube for photoelectric measurement and light-detection applications.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: B12A
Base pins: -
Nominal heater: -

Description

1P31 is a gas-filled phototube intended for photoelectric light detection, with published spectral response, sensitivity, dark-current and cathode-current ratings.

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: -
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: 95 V

Gas-filled two-electrode phototube; S1 spectral response.

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

1945 Continental Electronics

Published operating points and test conditions from this source.

SECTION 1

PhotoemissiveDetector

Characteristic

Spectral Response
S1
Luminous Sensitivity
55 to - uA/lm
95 V; 0 cycles
Gas Amplification
10
Maximum
Wavelength Maximum Response
8000 angstrom
Approximate
Sensitivity at Maximum Response
0.007 uA/uW

Other

Dark Current
- to 0.1 uA
95 V
Cathode Current Density
- to 100 uA/in2
Maximum
Average Cathode Current
- to 20 uA
0.2 sq in sensitive cathode area