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

23HP4

Large P4 monochrome cathode-ray picture tube documented by manufacturer data for direct-view television display, with high-voltage operation and conventional beam focusing and deflection for type 23HP4.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
B7-208
Socket code
EIGHTAR7
Base pins
7
Nominal heater
6.3 V / 600 mA

Description

23-inch direct-view Phototron television picture tube with electrostatic focus, magnetic deflection, short neck, and approximately 110-degree diagonal deflection.

Socket description

Eightar 7-contact CRT base family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
B7-208
Socket code
EIGHTAR7
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

B7-208 - 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.

CRT electrode ratings, focusing/deflection data, capacitances, and operating voltages are preserved 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

1951 Thomas Electronics

Published operating points and test conditions from this source.

SECTION 0

Cathode Ray

Characteristic

  • FocusingMethod

    Electrostatic

  • DeflectionMethod

    Magnetic

  • Deflection Angle

    110 degree

  • Heater Voltage

    6.3 V

  • Heater Current

    600 mA

Other

  • MaximumMainAnodeOrAcceleratorVoltage

    20000 V

  • TypicalMainAnodeOrAcceleratorVoltage

    16000 V

  • MaximumFocusingElectrodeVoltage

    -500 to 2000 V

  • Maximum Grid2 Voltage

    500 V

  • Typical Grid2 Voltage

    300 V

  • Grid1CutoffVoltage

    -72 to -35 V

  • Maximum Heater Cathode Voltage

    200 V

    AfterWarmup