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Specialized - Cathode Ray ·CathodeRay

MW4369

Seventeen-inch rectangular television picture tube with metal-backed gray-filter screen, ion-trap pentode gun, and magnetic focusing and deflection.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B12A
Base pins
-
Nominal heater
6.3 V / 300 mA

Description

The Ferranti MW4369 is a 17-inch rectangular television cathode-ray tube with a metal-backed grey filter screen, ion-trap pentode gun, and magnetic focusing and deflection.

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
300 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
15000 V

Rectangular all-glass television picture tube with filter glass, metal-backed screen, ion trap, magnetic focusing, and 70-degree magnetic deflection. The supplied sheet explicitly states equivalence to MW43-64 except for the metal backing.

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

    300 mA

  • DeflectionMethod

    Magnetic

  • FocusingMethod

    Magnetic

  • Deflection Angle

    70 degree

  • ScreenConstruction

    Metal-backed

  • EquivalentType

    MW4364

    Except metal-backed screen

  • IonTrapPresent

    1 boolean

  • FilterGlassPresent

    1 boolean

Other

  • TypicalAcceleratingVoltage

    14000 V

  • MaximumAcceleratingVoltage

    15000 V

Data set 02

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Screen Size

    17 in

    Diagonal

  • Focusing Method

    Magnetic text

  • Deflection Method

    Magnetic text

  • Screen Construction

    Metal-backed grey filter text

  • Fluorescence

    White text

  • Light Transmission

    66 percent

Data set 03

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Equivalent electrical type

    MW43-64

    Except for metal-backed screen

  • Deflection angle

    70 deg

  • Screen construction

    Filter glass, metal-backed

Data set 04

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

  • Deflection

    70

    magnetic focusing and 70~ magnetic deflection

  • Deflection

    70

    Fokussierung und 70 magnetischer Ablenkung