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Specialized - Cathode Ray ·CathodeRay

31C13

Six-inch magnetically focused and deflected cathode-ray tube for radio direction-finding compass equipment. An internal compass scale integrates bearing reference markings directly with the displayed directional information.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
5
Nominal heater
6.3 V / 600 mA

Description

Magnetically focused and deflected 6-inch cathode-ray tube with internal compass scale 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
5
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

  • MaximumAnodeVoltageDesignCentre

    10000 V

  • AbsoluteMaximumAnodeVoltage

    12500 V

  • Minimum Anode Voltage

    7500 V

  • Maximum Heater Cathode Voltage

    150 V

  • Typical Anode Voltage

    9500 V

  • GridBiasForCutoff

    -93 to -43 V

Capacitance

  • GridToAllCapacitance

    4.7 pF

  • Cathode To All Capacitance

    5.3 pF

Data set 02

1961 Associated Electrical Industries

Published operating points and test conditions from this source.

SECTION 0

Cathode Ray

Other

  • MaximumAnodeVoltageDesignCentre

    10000 V

  • AbsoluteMaximumAnodeVoltage

    12500 V

  • Minimum Anode Voltage

    7500 V

  • Maximum Heater Cathode Voltage

    150 V

  • Typical Anode Voltage

    9500 V

  • GridBiasForCutoff

    -93 to -43 V

Capacitance

  • GridToAllCapacitance

    4.7 pF

  • Cathode To All Capacitance

    5.3 pF