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

30C2

Precision measurement cathode-ray tube with electrostatic focusing and deflection and a polished flat face. AEI documentation identifies it for laboratory and industrial instrumentation requiring accurate trace geometry.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
12
Nominal heater
4 V / 720 mA

Description

Precision measurement cathode-ray tube with electrostatic focusing and deflection and a polished flat face.

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
4 V
Nominal heater current
720 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

  • MaximumFirstAnodeVoltage

    2500 V

  • MaximumSecondAnodeVoltage

    1000 V

  • MaximumThirdAnodeVoltage

    6000 V

  • TypicalThirdAnodeVoltage

    2000 to 5000 V

  • TypicalSecondAnodeVoltageForFocus

    440 to 800 V

  • TypicalFirstAnodeVoltage

    2000 V

  • GridBiasForCutoff

    -60 V

  • XPlateSensitivityAt2000V

    0.3 mm/V

  • XPlateSensitivityAt5000V

    0.12 mm/V

  • YPlateSensitivityAt2000V

    0.57 mm/V

  • YPlateSensitivityAt5000V

    0.23 mm/V

Capacitance

  • X1ToAllCapacitance

    15 pF

  • X2ToAllCapacitance

    15 pF

  • Y1ToAllCapacitance

    14.5 pF

  • Y2ToAllCapacitance

    14.5 pF

  • GridToAllCapacitance

    9.5 pF

Data set 02

1961 Associated Electrical Industries

Published operating points and test conditions from this source.

SECTION 0

Cathode Ray

Other

  • MaximumFirstAnodeVoltage

    2500 V

  • MaximumSecondAnodeVoltage

    1000 V

  • MaximumThirdAnodeVoltage

    6000 V

  • TypicalThirdAnodeVoltage

    2000 to 5000 V

  • TypicalSecondAnodeVoltageForFocus

    440 to 800 V

  • TypicalFirstAnodeVoltage

    2000 V

  • GridBiasForCutoff

    -60 V

  • XPlateSensitivityAt2000V

    0.3 mm/V

  • XPlateSensitivityAt5000V

    0.12 mm/V

  • YPlateSensitivityAt2000V

    0.57 mm/V

  • YPlateSensitivityAt5000V

    0.23 mm/V

Capacitance

  • X1ToAllCapacitance

    15 pF

  • X2ToAllCapacitance

    15 pF

  • Y1ToAllCapacitance

    14.5 pF

  • Y2ToAllCapacitance

    14.5 pF

  • GridToAllCapacitance

    9.5 pF