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Specialized - Cathode Ray ·CathodeRay

14NP4

P4 cathode-ray display tube designed for high-voltage direct viewing, with anode ratings to about 14 kV and adjustable electrostatic focusing controls.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
DUODECAL6
Base pins
-
Nominal heater
4 V / 4 A

Description

WESTINGHOUSE ELECTRONIC TUBE DIVISION April 23, 1956 Page 1 Television Picture Tube Types 14NP4 & 14NP4~A Rectangular Glass Construction Electrostatic Focus 90° Deflection External Conductive Coating Spherical Faceplate Magnetic Deflection 12-1/8n g-5/8" Picture Size The 14NP4 and 14NPshare electrostatic-focus, directly-viewed picture tubes of rec- tangular glass construction. A new bulb design permits 90° deflection with & re- sulting reduction of the overall length of approximately two inches as compared with previously available l4-inch tubes, The faceplates are spherical and they are made of neutral gray glass, Both types have an external conductive coating; the 14NP4A hes a metal-backed screen for increased picture brightness, GENERAL DATA Electrical: Cathode. . . . . . . . . ¢ 4 ¢ s v v o s s « o o« » oCoated Unipotential Heater: Voltage. . v v v v 4w v v o o v o o o 4 a e 6.3 ac or dec Volts Current. . +. v v 4 4 4 b 4 e e e e e e e 0.6 Ampere Direct Interelectrode Capacitances:

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
-
Nominal heater voltage
4 V
Nominal heater current
4 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

No fixed ratings are recorded for this section.

Source-derived physical section; applicable promoted ratings are populated from the printed sheet.

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

1947 Westinghouse

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Voltage. . v v v v

    6.3 V

    Voltage. . v v v v 4w v v o o v o o o 4 a e 6.3 ac or dec Volts

  • Current. . +. v v

    600 mA

    Current. . +. v v 4 4 4 b 4 e e e e e e e 0.6 Ampere

  • Cathode to all other electrodes, . . . .,

    5 pF

    Cathode to all other electrodes, . . . ., . . 5 upf

  • Minimum . . . . &

    500 pF

    Minimum . . . . & 4 4 v 4 4 4 4 o 0 4 o . 500 ppf

  • Anode VOltage # v o o o o o o o « ¢ o « ¢ o o

    14000 V

    Anode VOltage # v o o o o o o o « ¢ o « ¢ o o 2 + « + « « 14000 max, Volts

  • Grid

    4 V

    Grid 4 Voltage:

  • Positive VBlU€ . o « o &

    1000 V

    Positive VBlU€ . o « o & 4 o s o = 4 o o o o s o+ o » » 1000 max, Volts

  • Negative Value , . . o ¢ o v s o o o o o o s o o » « »

    500 V

    Negative Value , . . o ¢ o v s o o o o o o s o o » « » 500 max., Volts

  • Grid

    500 V

    Grid 2 Voltege o &« . o o « « « « o o o « o « « o + » » « 500 max, Volts

  • Grid

    1 V

    Grid 1 Voltage:

  • Negative Biss Value , ., . . . . ¢ v &

    180 V

    Negative Biss Value , ., . . . . ¢ v & 4 o o o v o o & 180 max. Volts

  • Positive Bias Value ., ., . . . & v v v

    0 V

    Positive Bias Value ., ., . . . & v v v 4 o o » o s ¢ 0 max, Volts

  • Positive Peak Value ., . » v & ¢ o « e o o

    0 V

    Positive Peak Value ., . » v & ¢ o « e o o 2 o » o o 0 max, Volts

  • During Werm-up Period of

    410 V

    During Werm-up Period of 15 sec. max., . . . . + .. 410 mex, Volts

  • After Equipment Warm-up Period . . . . . . . +

    180 V

    After Equipment Warm-up Period . . . . . . . + . . 180 mex. Volts

  • Heater Positive with respect to Cathode

    180 V

    Heater Positive with respect to Cathode . . . . . . . 180 max. Volts

  • For Anode Voltage #,

    12000 V

    For Anode Voltage #, . . . . . . . . . . . . 10,000 12,000 Volts

  • For Grid

    300 V

    For Grid 2 Voltage . ., . . + . . « « » « « . . 250 300 Volts

  • Grid

    4 V

    Grid 4 Voltage for Focus

  • pampere . . . . . . e e o« + » =

    350 A

    pampere . . . . . . e e o« + » =50 to +4350 -50 to+350 Volts

  • Grid

    1 V

    Grid 1 Voltage for Vlsual

  • Focused Raster, . . . .. . =

    72 V

    Focused Raster, . . . .. . =24 to =64 -28 to =72 Volts

  • Grid

    1.5 Mohm

    Grid 1 Circuit Resistance#, . , . . . . . . . . . . . . 1.5 max, Megohms

  • Grid

    0.1 Mohm

    Grid 2 Circuit Resistesnce*, . . . . . . . . +. ¢ « « o » 0.1 min, Megohms

  • the anode voltage should not be less than ),

    0 V

    the anode voltage should not be less than ),000 volts,

Characteristic

  • Focus Electrode Circuit Resistance. . . . . e e o o+

    0.1 Mohm

    Focus Electrode Circuit Resistance. . . . . e e o o+ 0.1 min., Megohms