FJ401

Gas-filled two-electrode phototube with high visible-range sensitivity and maximum response in the blue region. It provides direct photoelectric detection with gas-enhanced output for visible-light measurement.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

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

Description

The GL-1P29/FJ-401 is a gas-filled two-electrode phototube with high visible-range sensitivity and maximum response in the blue region.

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

No fixed ratings are recorded for this section.

Phototube-specific quantities preserved as parameters.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

PhotoemissiveDetector

Other

Maximum Anode Voltage
100 V
Maximum Dark Current at 90 V
0.1 uA

Characteristic

Maximum Gas Amplification
9
Wavelength of Maximum Response
4200 angstrom
Sensitivity at Maximum Response
0.01 uA/uW