SR50

High-vacuum light-sensitive phototube with spectral response extending from deep red through the near ultraviolet. Designed for direct photoelectric detection across a broad optical wavelength range.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 0 V / 0 mA

Description

High-vacuum light-sensitive phototube with deep-red through near-ultraviolet spectral response.

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: 0 V
Nominal heater current: 0 mA
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.

High-vacuum phototube photoemissive section.

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

1947 Westinghouse

Published operating points and test conditions from this source.

SECTION 1

PhotoemissiveDetector

Characteristic

CathodeSensitivity
15 uA/lm
SpectralResponse
DeepRed_NearUV text

Other

MaximumOperatingVoltage
500 V
MaximumCathodeCurrentDensity
20 uA/in2