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Specialized - Cathode Ray ·CathodeRay

19AYP4

Nineteen-inch direct-view monochrome television picture tube with electrostatic focusing, magnetic deflection, and an aluminized P4 screen. Manufacturer documentation places it in the high-voltage picture-tube family used for bright, high-contrast receiver display.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
8HR
Socket code
NEOEIGHTAR7
Base pins
-
Nominal heater
6.3 V / 450 mA

Description

19AY direct-view monochrome television CRT with electrostatic focus, magnetic deflection, aluminized P4 screen, and gray/filter faceplate construction.

Socket description

Small-button Neoeightar 7-contact CRT base family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8HR
Socket code
NEOEIGHTAR7
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
450 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

8HR - 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
Max screen voltage
1550 V

Same electrical system as 19AVP4 except 450 mA heater.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Phosphor

    P4

  • Focusing method

    Electrostatic

  • Deflection method

    Magnetic

Other

  • Heater voltage

    6.3 V

  • Heater current

    450 mA

Data set 02

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

  • Horizontal deflection angle

    102 deg

  • Diagonal deflection angle

    114 deg

  • Vertical deflection angle

    86 deg

  • Fluorescence

    White

  • Persistence

    Short to medium

  • Heater voltage

    6.3 V

  • Heater current

    600 mA

Construction

  • Phosphor

    Aluminized P4

Other

  • Maximum anode voltage

    20000 V

  • Typical anode voltage

    20000 V

  • Typical focus-electrode voltage maximum

    400 V

  • Typical grid2 voltage

    500 V

  • Cutoff voltage range

    -43 to -78 V

  • Grid1 circuit resistance maximum

    1.5 Mohm

  • Anode voltage minimum

    11000 V

  • Focus-electrode voltage range

    -400 to +1250 V

  • Grid2 voltage minimum

    350 V

  • Grid2 voltage maximum

    700 V

Capacitance

  • Grid1-to-all capacitance

    6 pF

  • External conductive coating to anode capacitance maximum

    1500 pF

Application

  • Application

    Monochrome television picture display

Data set 03

1971 RCA HB3 Binder 1 of 7

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Heater voltage

    6.3 V

  • Heater current

    450 mA

  • Heater warm-up time

    11 s

  • Maximum anode/ultor voltage

    23000 V

  • Minimum anode/ultor voltage

    15000 V

  • Typical anode/ultor voltage

    20000 V

    PictureTubeService

  • Maximum grid No.2 voltage

    1550 V

  • Typical grid No.2 voltage

    900 V

    PictureTubeService

  • Focus-voltage range minimum

    0 V

    OptimumFocus

  • Focus-voltage range maximum

    400 V

    OptimumFocus

  • Visual-extinction voltage range minimum

    -94 V

    FocusedRasterExtinction

  • Visual-extinction voltage range maximum

    -36 V

    FocusedRasterExtinction

  • Maximum grid No.1 circuit resistance

    1.5 megohm

  • X-ray shielding warning

    Present

    HighAnodeVoltage

  • Maximum negative grid No.1 peak voltage

    220 V

  • Maximum negative grid No.1 bias magnitude

    155 V

  • Maximum positive grid No.1 peak voltage

    2 V

  • Peak heater-cathode voltage during warm-up

    450 V

    HeaterNegative;Warmup<=15s

  • Peak heater-cathode voltage after warm-up

    200 V

    HeaterNegative

  • Peak heater-cathode voltage heater positive

    200 V

    HeaterPositive

  • Adjustable centering magnet field strength maximum

    9 gauss

    Approximate

Construction

  • Focusing method

    LowVoltageElectrostatic

  • Deflection method

    Magnetic

  • Phosphor

    P4

  • Screen type

    White

    P4

Characteristic

  • Deflection angle

    114 deg

    Approximate

Capacitance

  • Cathode to all other electrodes capacitance

    5 pF

    Approximate