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Specialized - Cathode Ray ·CathodeRay

31C12

Six-inch cathode-ray tube with electrostatic focusing and magnetic deflection for radio direction-finding compass equipment. The mixed focusing and scanning system provides a compact direct-view navigational bearing display.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
12
Nominal heater
6.3 V / 600 mA

Description

Electrostatically focused and magnetically deflected 6-inch cathode-ray tube for radio direction-finding compass equipment.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
12
Nominal heater voltage
6.3 V
Nominal heater current
600 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 0

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this 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

1961 AEI Industrial Valves

Published operating points and test conditions from this source.

SECTION 0

Cathode Ray

Other

  • MaximumFirstAndThirdAnodeVoltageDesignCentre

    14000 V

  • AbsoluteMaximumFirstAndThirdAnodeVoltage

    15500 V

  • MinimumFirstAndThirdAnodeVoltage

    10000 V

  • MaximumSecondAnodeVoltage

    700 V

  • Maximum Heater Cathode Voltage

    180 V

  • Maximum Peak Heater Cathode Voltage

    400 V

  • TypicalFirstAndThirdAnodeVoltage

    12000 V

  • TypicalSecondAnodeVoltageForFocus

    -100 to 300 V

  • GridBiasForCutoff

    -72 to -30 V

Capacitance

  • GridToAllCapacitance

    5.5 pF

  • Cathode To All Capacitance

    6 pF

Data set 02

1961 Associated Electrical Industries

Published operating points and test conditions from this source.

SECTION 0

Cathode Ray

Other

  • MaximumFirstAndThirdAnodeVoltageDesignCentre

    14000 V

  • AbsoluteMaximumFirstAndThirdAnodeVoltage

    15500 V

  • MinimumFirstAndThirdAnodeVoltage

    10000 V

  • MaximumSecondAnodeVoltage

    700 V

  • Maximum Heater Cathode Voltage

    180 V

  • Maximum Peak Heater Cathode Voltage

    400 V

  • TypicalFirstAndThirdAnodeVoltage

    12000 V

  • TypicalSecondAnodeVoltageForFocus

    -100 to 300 V

  • GridBiasForCutoff

    -72 to -30 V

Capacitance

  • GridToAllCapacitance

    5.5 pF

  • Cathode To All Capacitance

    6 pF