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

14HP4

Direct-view P4 television picture tube using low-voltage electrostatic focusing and magnetic deflection, with white medium-persistence fluorescence and later ratings supporting operation around 22 kV.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
DUODECAL5
Base pins
12
Nominal heater
6.3 V / 600 mA

Description

Rectangular direct-view television picture tube with low-voltage electrostatic focus, magnetic deflection, P4 white phosphor, and grey-filter faceplate.

Socket description

Small-shell Duodecal 5-contact CRT base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
DUODECAL5
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 1

Cathode Ray

X-ray radiationInterelectrode capacitances
Max plate voltage
24000 V
Max screen voltage
450 V

CRT-specific electrode/focus/deflection values retained in parameter rows.

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 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Maximum Anode Voltage

    14000 V

  • Typical Anode Voltage

    12000 V

  • Maximum Grid2 Voltage

    450 V

  • Typical Grid2 Voltage

    300 V

Characteristic

  • FocusingMethod

    LowVoltageElectrostatic

  • DeflectingMethod

    Magnetic

  • DeflectionAngleApproximate

    70 degree

  • PhosphorNumber

    4

  • FluorescentColor

    White

Data set 02

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Construction

  • Focusing method

    LowVoltageElectrostatic

  • Deflecting method

    Magnetic

  • Phosphor

    P4

    White;MediumPersistence

Characteristic

  • Deflection angle

    65 deg

    Approximate

  • Faceplate light transmission at center

    74 %

    Approximate

Capacitance

  • Cathode to all other electrodes capacitance

    5 pF

    Approximate

  • Grid #1 to all other electrodes capacitance

    6 pF

    Approximate

Other

  • Heater voltage

    6.3 V

  • Heater current

    600 mA

  • Maximum DC anode voltage

    24000 V

  • Maximum DC grid #2 voltage

    450 V

  • Maximum grid #1 negative-bias magnitude

    125 V

  • Maximum grid #1 positive DC bias

    0 V

  • Maximum grid #1 positive peak

    2 V

  • Typical DC anode voltage

    22000 V

    TelevisionPictureTube

  • Typical DC grid #2 voltage

    300 V

    TelevisionPictureTube

  • Typical grid #1 voltage minimum

    -72 V

    VisualExtinctionRange

  • Typical grid #1 voltage maximum

    -28 V

    VisualExtinctionRange

  • Ion trap current

    70 mA

    Approximate

Application

  • Application

    Direct-view television picture tube