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Tube Tinker — Electron Tube Database
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Specialized - Cathode Ray ·CathodeRay

21FBP22

Twenty-one-inch color television picture tube with electrostatic focusing, magnetic deflection, and a P22 color screen. Its high-voltage direct-view construction is designed for color receiver service and carries published X-ray precautions.

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

Description

The 21FBP22 is a 21-inch television cathode-ray tube with magnetic deflection and P22 phosphor.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
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

No fixed ratings are recorded for this section.

Television CRT electron-gun/display section.

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

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

  • Phosphor

    P22 text

  • Fluorescence

    Color text

  • Persistence

    Medium text

Other

  • Maximum Anode Voltage

    25000 V

    RepresentativeFamilyLimit

  • Typical Anode Voltage

    18000 V

    RepresentativeFamilyOperatingPoint

  • Maximum Grid2 Voltage

    700 V

    RepresentativeFamilyLimit

  • Maximum Grid1 Negative Bias

    220 V

    RepresentativeFamilyLimit

  • Maximum Heater-Cathode Voltage

    200 V

    AfterWarmup

  • Maximum Grid1 Circuit Resistance

    1.5 Mohm