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

23GWP4

Large aluminized P4 monochrome television picture tube for high-voltage direct-view service, using electrostatic focusing and magnetic deflection with manufacturer-specified operating characteristics for type 23GWP4.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B8H
Base pins
-
Nominal heater
6.3 V / 450 mA

Description

23-inch 110-degree monochrome television CRT with electrostatic focus, magnetic deflection, and aluminized P4 screen.

Socket description

Neoeightar 8-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B8H
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
450 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
22000 V

Published source ratings and characteristics promoted where applicable; additional electrical and operating data retained as parameters.

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

1964 RMA EIA

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Application

  • Application

    Cathode-ray display / television / instrumentation

Characteristics

  • Focusing method

    Electrostatic

  • Deflection method

    Magnetic

  • Horizontal deflection angle

    99 deg

  • Vertical deflection angle

    82 deg

  • Diagonal deflection angle

    110 deg

  • Heater warm-up time

    11 s

Capacitance

  • Cathode-to-all capacitance

    4 pF

  • Grid1-to-all capacitance

    5 pF

  • External coating capacitance minimum

    2000 pF

  • External coating capacitance maximum

    2500 pF

Other

  • Anode voltage minimum

    11000 V

  • Focus-electrode positive voltage maximum

    1250 V

  • Focus-electrode negative voltage minimum

    -400 V

  • Grid2 voltage minimum

    40 V

  • Grid2 voltage maximum

    80 V

  • Grid1 negative voltage maximum

    -154 V

  • Grid1 negative peak maximum

    -220 V

  • Grid1 positive peak maximum

    2 V

  • Heater voltage minimum

    5.7 V

  • Heater voltage maximum

    6.9 V

  • Heater-cathode voltage during warm-up maximum

    450 V

  • Heater-cathode voltage after warm-up maximum

    300 V

  • Typical anode voltage

    18000 V

  • Typical focus voltage

    150 V

  • Typical grid2 voltage

    50 V

  • Cathode cutoff voltage range

    +33 to +45 V

  • Grid1 circuit resistance maximum

    1.5 Mohm