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

23GBP4

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 23GBP4.

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

Description

23-inch 110-degree banded monochrome television CRT with 450 mA heater.

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
23000 V

Published CRT maximum ratings, operating conditions, capacitances, and deflection/focus data retained; X-ray precautions apply at elevated EHT.

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

Characteristics

  • Focusing method

    Electrostatic

  • Deflection method

    Magnetic

  • Horizontal deflection angle

    99 deg

  • Vertical deflection angle

    82 deg

  • Diagonal deflection angle

    110 deg

  • Heater voltage

    6.3 V

  • Heater current

    450 mA

  • Heater warm-up time

    11 s

  • External coating-to-implosion hardware resistance minimum

    50 Mohm

Capacitance

  • Cathode-to-all capacitance

    5 pF

  • Grid1-to-all capacitance

    6 pF

  • External coating capacitance minimum

    1700 pF

  • External coating capacitance maximum

    2500 pF

Other

  • Anode voltage maximum

    23000 V

  • Anode voltage minimum

    12000 V

  • Typical anode voltage

    16000 V

  • Typical focus-electrode voltage

    250 V

  • Typical grid2 voltage

    50 V

  • Grid1 cutoff range

    39 to 94 V

Application

  • Application

    Monochrome television picture display