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Tube Tinker — Electron Tube Database
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Specialized - Cathode Ray ·CathodeRay

A5911W

Large 59 cm-class monochrome television picture tube for high-voltage direct-view service, using manufacturer-specified magnetic deflection, focusing, screen, and beam-control characteristics.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
Small-button neo
Socket code
-
Base pins
-
Nominal heater
6.3 V / 300 mA

Description

59 cm direct-view monochrome television CRT, 110-degree deflection, electrostatic focus, metal-backed screen.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
Small-button neo
Socket code
-
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Small-button neo - 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

Cathode Ray

X-ray radiationInterelectrode capacitances
Max plate voltage
20000 V
Max screen voltage
700 V

Published Mullard ratings, characteristics, capacitances, and operating data promoted where applicable; additional electrical values retained 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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Focusing method

    Electrostatic

  • Deflection method

    Magnetic

  • Deflection angle

    110 deg

  • Light transmission

    50 %

Construction

  • Screen construction

    Metal-backed

Application

  • Application

    Direct-view television / radar display

Other

  • Final-anode voltage maximum

    20 kV

  • Final-anode voltage operating

    16 kV

  • First-anode voltage maximum

    800 V

  • Focus-electrode positive voltage maximum

    1000 V

  • Focus-electrode negative voltage maximum

    -500 V

  • Heater surge voltage maximum

    9.5 V rms

    SeriesHeater

  • Grid positive excursion maximum

    2 V

  • Anode supply source impedance maximum

    1.5 Mohm

Data set 02

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

  • Grid 1 capacitance

    6 pF

  • Cathode capacitance

    4 pF

  • Useful screen diagonal

    566 mm

  • Deflection angle

    110 deg

  • Final accelerator voltage

    18 kV

  • Final accelerator voltage minimum

    11 kV

  • Grid 2 voltage maximum

    700 V

  • Cathode-to-heater voltage maximum

    250 V