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

9CP4

Short nine-inch Videotron television picture tube with electromagnetic focusing and deflection. Its compact direct-view construction is intended for monochrome television image display.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
2.5 V / 2.1 A

Description

Short nine-inch Videotron cathode-ray tube with electromagnetic focus and deflection.

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
2.5 V
Nominal heater current
2.1 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

No fixed ratings are recorded for this section.

Values promoted only where clearly published for this section in the approved 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

1938 National Union

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • HEATER VOLTAGE

    2.5 VOLTS

    Published source value; see source line context.

  • HIGH-VOLTAGE ANODE

    7000 VOLTS

    Published source value; see source line context.

  • ANODE VOLTAGE

    6000 VOLTS

    Published source value; see source line context.

  • CONTROL GRID VOLTAGE FOR CUT-OFF

    -90 VOLTS

    Published source value; see source line context.

  • CONTROL GRID, PEAK-to-PEAK VOLTAGE

    25 VOLTS

    Published source value; see source line context.

Characteristic

  • HEATER CURRENT

    2.1 AMP

    Published source value; see source line context.

  • GRID to CATHODE

    12 ppf

    Published source value; see source line context.