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

Specialized - Cathode Ray ·CathodeRay

10WP7

Ten-inch cathode-ray display tube with electrostatic focusing and magnetic deflection. Its P7 screen combines blue fluorescence with long yellow phosphorescence, providing a persistent afterglow useful for viewing transient or slowly refreshed information.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
DUODECAL6
Base pins
5
Nominal heater
6.3 V / 600 mA

Description

Ten-inch radar CRT with low-voltage electrostatic focus and magnetic deflection.

Socket description

Small-shell Duodecal 6-contact CRT base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
DUODECAL6
Base pins
5
Nominal heater voltage
6.3 V
Nominal heater current
600 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
Amplification factor
1
Max plate voltage
13200 V

Values promoted from published ratings/characteristics where identifiable.

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

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Heater Voltage

    6.3 volts

    Heater Voltage 6.3 volts

  • During warm-up period not to exceed

    12 volts

    During warm-up period not to exceed 15 sec. 410 volts DC 12M

  • After equipment warm - up period

    180 volts

    After equipment warm - up period 180 volts DC

  • Heater Positive with Respect to Cathode

    180 volts

    Heater Positive with Respect to Cathode 180 volts DC

  • Collector Voltage A

    0 volts

    Collector Voltage A 10,000 volts DC

  • Grid #

    300 volts

    Grid #4 Voltage (Focusing Electrode) ® 0 to 300 volts DC

  • Grid #

    300 volts

    Grid #2 Voltage 300 volts DC

  • Grid #

    -72 volts

    Grid #1Voltage @ -28 to -72 volts DC

Other

  • Collector Voltage A

    0 volts

    Collector Voltage A 12,000 volts DC

  • Grid #

    1000 volts

    Grid #4 Voltage (Focusing Electrode ) - 500 to + 1000 volts DC

  • Grid #

    700 volts

    Grid #2 Voltage 700 volts DC

  • Negative - Bias Value

    180 volts

    Negative - Bias Value 180 volts DC

  • Positive

    0 volts

    Positive 0 volts DC

  • Positive - Peak Value

    0 volts

    Positive - Peak Value 0 volts

  • power to

    19 watts

    power to 6 watts, The screen of the 10WP19 can be permanently damaged should the current density

  • decreasing collector voltages. In general, collector vcltage should not be less than

    0 volts

    decreasing collector voltages. In general, collector vcltage should not be less than 7,000 volts.

Data set 02

1960 Du Mont

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Heater Voltage

    6.3 V

  • Heater Current

    600 mA

  • Focusing Method

    Electrostatic text

  • Deflection Method

    Magnetic text

  • Phosphor

    P7 text

  • Fluorescence

    Blue/white text

  • Persistence

    Long text

  • Deflection Angle

    50 deg

    Approximate

Data set 03

1963 Ferranti

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Focusing method

    Electrostatic

  • Deflection method

    Magnetic

  • Fluorescence

    Blue; yellow afterglow

  • Persistence

    Long

Construction

  • Phosphor type

    J/P7

Application

  • Application

    Radar / monitor / display CRT

Other

  • First-anode voltage maximum

    600 V

  • Second/fourth-anode voltage maximum

    13200 V

  • Third-anode positive voltage maximum

    1000 V

  • Third-anode negative voltage maximum

    -500 V

  • First-anode operating voltage

    300 V

  • Third-anode focus voltage minimum

    -300 V

  • Third-anode focus voltage maximum

    300 V

Capacitance

  • Cathode-to-all capacitance maximum

    8 pF

  • Grid-to-all capacitance maximum

    8 pF

Data set 04

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Heater Voltage

    6.3 V

  • Heater Current

    600 mA

  • Focusing Method

    Electrostatic text

  • Deflection Method

    Magnetic text

  • Deflection Angle

    50 deg

    Approximate

  • Phosphor

    P7 text

  • Fluorescence

    Blue text

  • Persistence

    Long text

  • Screen Aluminized

    No text

  • Light Transmittance

    76 percent

    Approximate

  • Phosphorescence

    Yellow text

Other

  • Maximum Anode Voltage

    13200 V

  • Focus Electrode Voltage Minimum

    -550 V

    Grid4

  • Focus Electrode Voltage Maximum

    1100 V

    Grid4

  • Maximum Grid2 Voltage

    550 V

  • Maximum Heater-Cathode Voltage During Warmup

    450 V

    Duration<=15s

  • Maximum Heater-Cathode Voltage After Warmup

    200 V

  • Anode Voltage

    10000 V

  • Focus Voltage Minimum

    0 V

    Grid4

  • Focus Voltage Maximum

    300 V

    Grid4

  • Grid2 Voltage

    300 V

  • Grid1 Cutoff Voltage Minimum

    -72 V

  • Grid1 Cutoff Voltage Maximum

    -28 V

  • Maximum Grid1 Circuit Resistance

    1.5 Mohm