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

E4612

Twelve-inch white-screen television cathode-ray tube designed for direct-view monochrome receiver display service.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
4 V / 1 A

Description

Twelve-inch white-screen television cathode-ray tube.

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
4 V
Nominal heater current
1 A
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
5000 V

Published ratings, characteristics, operating conditions and capacitances extracted from supplied Mullard source.

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

Characteristic

  • HeaterOrFilamentVoltage

    4 V

  • HeaterOrFilamentCurrent

    1 A

  • GridToAllCapacitance

    15 pF

  • DeflectionPlatePairNearCathodeCapacitance

    5.5 pF

  • DeflectionPlatePairNearScreenCapacitance

    6.5 pF

  • DeflectionMethod

    Double electrostatic

  • PhosphorColour

    White

Other

  • ThirdAnodeVoltage

    5000 V

  • SecondAnodeVoltage

    1400 V

  • FirstAnodeVoltage

    250 V

  • GridVoltageRange

    0 to -60 V

  • DeflectionSensitivityNearCathode

    0.17 mm/V

  • DeflectionSensitivityNearScreen

    0.13 mm/V

  • ThirdAnodeVoltageMaximum

    5000 V

  • SecondAnodeVoltageMaximum

    1700 V

  • FirstAnodeVoltageMaximum

    250 V

  • GridVoltageMagnitudeMaximum

    200 V