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Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Cathode Ray ·CathodeRay

A2814W

European rectangular monochrome television picture tube with electrostatic focusing, magnetic deflection, and an aluminized or metal-backed screen. Manufacturer documentation supports direct-view receiver service with wide-angle deflection and compact cabinet geometry.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
11 V / 68 mA

Description

28 cm 90-degree self-protected monochrome television picture tube with tinted aluminized screen.

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
11 V
Nominal heater current
68 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

Cathode Ray

X-ray radiationInterelectrode capacitances
Max plate voltage
28000 V

Published Telefunken/JEDEC ratings and characteristics promoted where applicable; additional 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

1959 Telefunken

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Application

  • Application

    Television picture display

Characteristics

  • Focusing method

    Electrostatic

  • Deflection method

    Magnetic

  • Deflection angle

    90 deg

  • Faceplate light transmission

    50 %

  • Screen persistence

    Medium

Construction

  • Screen diagonal

    262.5 mm

  • Screen width

    228 mm

  • Screen height

    171 mm

  • Screen construction

    Metal-backed grey glass

  • Ion trap

    Not required

Data set 02

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Heater Voltage

    11 V

  • Heater Current

    68 mA

  • Focusing Method

    Electrostatic text

  • Deflection Method

    Double magnetic text

  • Deflection Angle

    90 deg

  • Light Transmission

    55 percent

  • Grid Cutoff Voltage Range

    -35 to -69 V

  • Grid Capacitance

    7 pF

  • Cathode Capacitance

    3 pF

  • Final-Anode-to-Coating Capacitance Minimum

    550 pF

  • Final-Anode-to-Coating Capacitance Maximum

    850 pF

Other

  • Final Anode Voltage

    11000 V

  • Focus Electrode Voltage Minimum

    0 V

  • Focus Electrode Voltage Maximum

    350 V

Data set 03

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Heater or filament voltage

    11 V

    Published nominal value

  • Heater or filament current

    68 mA

    Published nominal value

  • Screen diagonal

    28 cm

    Published

  • Deflection angle

    90 deg

    Published