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Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Cathode Ray ·CathodeRay

MW434302

Direct-view monochrome television picture tube with magnetic beam scanning and high-voltage operation. Manufacturer documentation identifies it for television receiver service and provides the applicable screen, focusing, and deflection construction.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B12A
Base pins
-
Nominal heater
6.3 V / 600 mA

Description

Rectangular television picture tube with metal cone, ion trap, and filter glass.

Socket description

Duodecal 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B12A
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
Max plate voltage
16000 V

Rectangular television picture tube, /02 variant, with magnetic focusing and magnetic deflection.

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

1957 Philips Receiving and Amplifying Tubes

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    600 mA

  • DeflectionMethod

    Magnetic

  • FocusingMethod

    Magnetic

  • UsefulScreenWidthMinimum

    365 mm

  • IonTrapPresent

    1 boolean

  • FilterGlassPresent

    1 boolean

Other

  • TypicalAcceleratingVoltage

    14000 V

  • MaximumAcceleratingVoltage

    14000 V

Data set 02

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Capacitance

  • Grid capacitance

    7 pF

Other

  • Screen color

    White

  • Color temperature

    7500 K

  • Light transmission

    66 %

  • Useful width

    365 to - mm

    Minimum

  • Useful height

    272 to - mm

    Minimum

  • Vertical deflection angle

    - to 53 deg

  • Horizontal deflection angle

    - to 66 deg

  • Grid-3 voltage

    14000 V

  • Grid-2 voltage

    300 V

  • Maximum grid-3 voltage

    16000 V

  • Minimum grid-3 voltage

    10000 V

  • Maximum grid-2 voltage

    410 V

  • Minimum grid-2 voltage

    200 V

Characteristic

  • Grid-1 cutoff-voltage magnitude

    33 to 77 V

  • Focusing ampere-turns

    1020 A-turns

Data set 03

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Capacitance

  • Capacitance

    7 pF

    Capacitgnces Cg1 = 7 pF

  • Capacitance

    7 pF

    Capacitances Ce1 = 7 pF

Characteristic

  • Deflection

    3

    3)space for deflection

  • Deflection

    3

    3)Space for deflection