Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Cathode Ray ·CathodeRay

MW3667

Rectangular all-glass television monitor CRT with filter glass, metal-backed screen, magnetic focusing, and double magnetic deflection for professional monitoring.

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

Description

Rectangular all-glass television monitor tube with filter glass, metal-backed screen, magnetic focusing, and double magnetic 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
14000 V

Rectangular all-glass television picture tube with filter glass, metal-backed screen, magnetic focusing, and double 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

    300 mA

  • DeflectionMethod

    Magnetic

  • FocusingMethod

    Magnetic

  • UsefulScreenDiagonalMinimum

    318 mm

  • DeflectionMethod

    Double magnetic

  • FilterGlassPresent

    1 boolean

Other

  • TypicalAcceleratingVoltage

    14000 V

  • MaximumAcceleratingVoltage

    15000 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-1 capacitance

    8 pF

  • Cathode capacitance

    - to 8 pF

    Maximum

Other

  • Screen color

    White

  • Light transmission

    66 %

  • Useful diagonal

    318 to - mm

    Minimum

  • Useful width

    288 to - mm

    Minimum

  • Useful height

    217 to - mm

    Minimum

  • Anode/grid-3 voltage

    14000 V

  • Grid-2 voltage

    300 V

Characteristic

  • Grid-1 cutoff-voltage magnitude

    30 to 70 V

Data set 03

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Capacitance

  • Capacitance

    8 pF

    Capacités Cg1 < 8 pF

  • Capacitance

    8 pF

    Capacitances Cet s 8 pF

Characteristic

  • Heater voltage

    5 V

    heater voltage must not exceed $.5 V when the supply

  • Heater voltage

    9.5 V

    darf die Heizspannung beim Einschalten 9,5 V nicht iiber-

  • Heater voltage

    9.5 V

    heater voltage must not exceed 9.5 V when the supply

  • Heater voltage

    9.5 V

    darf die Heizspannung beim Einschalten 9,5 V nicht Uber-