Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Cathode Ray ·CathodeRay

23EZP4

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 23EZP4.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
DUODECAL5
Base pins
7
Nominal heater
6.9 V / 20 A

Description

23-inch 94-degree monochrome television CRT with electrostatic focus, magnetic deflection, and aluminized P4 screen.

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
7
Nominal heater voltage
6.9 V
Nominal heater current
20 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
Max plate voltage
22000 V
Max screen voltage
94 V

CRT-specific ratings, operating conditions, capacitances, focus/deflection, cutoff, optical, and screen data are retained in section 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

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Focusing method

    Electrostatic

  • Deflection method

    Magnetic

  • Heater voltage

    6.3 V

  • Heater current

    450 mA

  • Diagonal deflection angle

    94 deg

  • Heater warm-up time

    11 s

Construction

  • Phosphor

    Aluminized P4

Other

  • Maximum anode voltage

    22000 V

  • Grid1 circuit resistance maximum

    1.5 Mohm

  • Anode voltage minimum

    11000 V

  • Typical anode voltage

    16000 V

  • Typical focus-electrode voltage

    0 to 400 V

  • Typical grid2 voltage

    50 V

  • Focus-electrode voltage minimum

    -550 V

  • Focus-electrode voltage maximum

    1100 V

  • Heater-cathode voltage maximum

    200 V

  • Grid2 voltage minimum

    20 V

  • Grid2 voltage maximum

    70 V

Application

  • Application

    Monochrome television picture display

Capacitance

  • Cathode-to-all capacitance

    5 pF

  • Grid1-to-all capacitance

    6 pF

Data set 02

1971 RCA HB3 Binder 1 of 7

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • 94° MAGNETIC DEFLECTION

    94 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid No.l to al l other electrodes

    6 pF

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • External conductive coating to anode — published value 1

    1700 mA

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • External conductive coating to anode — published value 2

    2500 mA

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater Current at 6.3 V — published value 1

    6.3 mA

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater Current at 6.3 V — published value 2

    450 mA

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater Current at 6.3 V — published value 3

    20 mA

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Light transmission at center (approx.)

    42

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Projected Area of Screen

    282

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid No. 5, Screen,

    5

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Anode Voltage — published value 1

    1 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Anode Voltage — published value 2

    1000 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Anode Voltage — published value 3

    23500 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.2 Voltage — published value 1

    20 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.2 Voltage — published value 2

    70 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater Voltage — published value 1

    5.7 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater Voltage — published value 2

    6.9 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Combined AC & DC voltage

    200 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Anode Voltage

    18000 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.4 Voltageb

    200 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.2 Voltage

    50 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Cathode Voltage — published value 1

    34 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Cathode Voltage — published value 2

    52 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No. l Circuit Resistance — published value 1

    1 mA

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No. l Circuit Resistance — published value 2

    5 mA

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.