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Specialized - Cathode Ray ·CathodeRay

9WP4

Pan-O-Ply television picture tube with aluminized P4 screen, 90-degree magnetic deflection, low grid-No.2 cathode-drive operation, and no requirement for an ion-trap magnet.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
7GR
Socket code
DUODECAL5
Base pins
7
Nominal heater
12 V / 75 mA

Description

Pan-O-Ply aluminized P4 picture tube with 90-degree magnetic deflection, low grid-No.2 voltage, cathode-drive operation, and no ion-trap magnet requirement.

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
7GR
Socket code
DUODECAL5
Base pins
7
Nominal heater voltage
12 V
Nominal heater current
75 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7GR - 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.

Cathode-ray section. CRT anode/ultor, grid, focus/deflection, heater-cathode, capacitance, and operating values are stored as 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

1971 RCA HB3 Binder 1 of 7

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Capacitance

  • Cathode to All Other Electrodes Capacitance

    5 pF

  • Grid #1 to All Other Electrodes Capacitance

    6 pF

  • External Conductive Coating to Anode Capacitance

    300 to 750 pF

Characteristics

  • Heater Warm-Up Time

    11 s

    Average

  • Deflecting Method

    Magnetic

Other

  • Anode Voltage

    8000 to 12000 V

    Design maximum

  • Grid #4 Positive Voltage

    - to 1100 V

  • Grid #4 Negative Voltage

    - to 550 V

  • Grid #2 Voltage

    75 to 250 V

  • Grid #1 Negative Peak Voltage

    - to 220 V

  • Grid #1 Negative Bias Voltage

    - to 155 V

  • Grid #1 Positive Bias Voltage

    - to 0 V

  • Grid #1 Positive Peak Voltage

    - to 2 V

  • Heater Voltage

    10.8 to 13.2 V

  • Peak Heater-Cathode Voltage - Heater Negative During Warm-Up

    - to 450 V

    Warm-up period <15 s

  • Peak Heater-Cathode Voltage - Heater Negative After Warm-Up

    - to 200 V

  • Peak Heater-Cathode Voltage - Heater Positive Combined AC and DC

    - to 200 V

  • Peak Heater-Cathode Voltage - Heater Positive DC Component

    - to 100 V

  • Anode Voltage

    9000 V

    CathodeDrive

  • Grid #4 Voltage

    0 to 300 V

    CathodeDrive

  • Grid #2 Voltage

    100 V

    CathodeDrive

  • Cathode Voltage for Visual Extinction

    32 to 50 V

    CathodeDrive

  • Centering Magnet Field Strength

    0 to 8 gauss

    CathodeDrive

  • Grid #1 Circuit Resistance

    - to 1.5 MΩ

    Maximum circuit value