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Specialized - Cathode Ray ·CathodeRay

5AUP24

Five-inch high-voltage cathode-ray display tube with electrostatic focusing, magnetic deflection, and P24 phosphor. Its high accelerating voltage and magnetically scanned display construction are suited to specialized radar/display service.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
87-51
Socket code
DUODECAL11
Base pins
7
Nominal heater
6.3 V / 600 mA

Description

Sylvania 5-inch cathode-ray tube with electrostatic focus, magnetic deflection, and P24 display phosphor. Published electrical ratings, capacitances, and operating conditions were extracted from the supplied datasheet.

Socket description

Duodecal 11-contact CRT base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
87-51
Socket code
DUODECAL11
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

87-51 - 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
27000 V

CRT maximum accelerating/anode/ultor voltage is promoted to MaxPlateVoltage; additional electrode ratings, capacitances, operating conditions, deflection/focus and optical data are preserved 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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

  • Grid No. 3 Voltage (Fo 20,000 Volts

    20 V

    Grid No. 3 Voltage (Fo 20,000 Volts

  • Grid No. 2 Voltage . . . 6600 Volts

    6600 V

    Grid No. 2 Voltage . . . 6600 Volts

  • Grid No. 1 Voltage dc

    1 V

    Grid No. 1 Voltage dc

  • Grid No. 3 Voltage for

    3 V

    Grid No. 3 Voltage for

  • Focus (Ib = 200 ya) < . 27000 Volts W YORK

    27000 V

    Focus (Ib = 200 ya) < . 27000 Volts W YORK

  • Grid No. 2 Voltage . . dc

    2 V

    Grid No. 2 Voltage . . dc

  • Grid No. 1 Voltage for e L dc TECHNICAL PUBLIC ed By The

    1 V

    Grid No. 1 Voltage for e L dc TECHNICAL PUBLIC ed By The

Other

  • at close range if this tube is operated ar higher than the manufacturer’s Maximum Rated Anode Voltag

    16 V

    at close range if this tube is operated ar higher than the manufacturer’s Maximum Rated Anode Voltage or 16,000 volts,

Data set 02

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    600 mA

  • FocusingMethod

    Electrostatic

  • DeflectionMethod

    Magnetic

  • Phosphor

    P24 display phosphor

  • MinimumUsefulScreen

    4.25 in

  • ExternalConductiveCoatingCapacitanceMinimum

    100 pF

  • ExternalConductiveCoatingCapacitanceMaximum

    500 pF

Other

  • FinalAnodeVoltageMaximum

    30000 V

  • FinalAnodeVoltageMinimum

    20000 V

  • FocusElectrodeVoltageMaximum

    6600 V

  • FinalAnodeVoltage

    27000 V

  • FocusElectrodeVoltageForFocus

    4600 to 5800 V

  • GridVoltageForCutoff

    -40 to -100 V

  • GridCircuitResistanceMaximum

    1.5 Mohm

  • Grid3 Voltage Maximum

    6600 V

  • Grid2VoltageMaximum

    385 V

  • GridNegativeBiasMagnitudeMaximum

    155 V

  • PeakGridNegativeVoltageMaximum

    220 V

Data set 03

1971 RCA HB3 Binder 1 of 7

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Maximum grid 3 voltage

    6000 V

  • Maximum grid 2 voltage

    350 V

  • Maximum grid 1 negative-bias voltage

    150 V

    NegativeBias

  • Maximum grid 1 positive-bias voltage

    0 V

    PositiveBias

  • Maximum grid 1 positive-peak voltage

    2 V

    PositivePeak

  • Peak heater-cathode voltage

    410 V

    HeaterNegativeWarmup

  • Peak heater-cathode voltage

    150 V

    HeaterNegativeAfterWarmup

  • Peak heater-cathode voltage

    150 V

    HeaterPositive

  • Maximum accelerating/anode voltage

    27000 V

  • ULTOR VOLTAGE

    27000 V

    Maximum

  • GRID-No.3 VOLTAGE

    6000 V

    Maximum

  • GRID-No.2 VOLTAGE

    350 V

    Maximum

  • Grid—No.2 Current —15 to

    15 uA

  • with ultor current of 200 la

    4600 to 5800 V

  • ted focused spot

    140 to 350 V

  • Grid—No.l—Circuit Resistance

    1.5 MΩ

    Maximum

Capacitance

  • Grid 1 to all other electrodes capacitance

    8 pF

    Approximate

  • Cathode to all other electrodes capacitance

    5 pF

    Approximate

  • External conductive neck coating to ultor capacitance maximum

    500 pF

    Maximum

  • External conductive neck coating to ultor capacitance minimum

    100 pF

    Minimum

Characteristic

  • Deflection angle

    40 degrees

    Approximate

  • Grid No.1 to all other electrodes

    8 pF

  • Cathode to all other electrodes

    5 pF

  • Deflection Angle (Approx.)

    40 degrees

  • Deflection angle

    40 degrees

    Approximate