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Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Cathode Ray ·CathodeRay

AW3680

European rectangular monochrome television picture tube with electrostatic focusing, magnetic deflection, and a metal-backed or aluminized screen. Manufacturer documentation supports high-voltage direct-view receiver service with compact wide-angle geometry.

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

Description

Rectangular television picture tube with filter glass, metal-backed screen, ion trap, electrostatic focus, and 90-degree 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

CRT-specific electrical, optical, deflection, focusing, capacitance, and mechanical data are retained in TUBE_SECTION_PARAMETER because the locked promoted fields primarily target conventional electrode sections.

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

  • Deflection Angle

    90 degree

  • DeflectionMethod

    Magnetic

  • FocusMethod

    Electrostatic

  • UsefulDiagonalMinimum

    330 mm

  • UsefulWidthMinimum

    306.5 mm

  • UsefulHeightMinimum

    241 mm

Data set 02

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Construction

  • Screen color

    White

    TelevisionCRT

  • Focusing

    Electrostatic

    TelevisionCRT

  • Deflection

    Double magnetic

    TelevisionCRT

Other

  • Screen useful dimension

    330 mm

    TelevisionCRT

  • Final accelerator voltage

    12 kV

    TelevisionCRT

  • Grid No.2 voltage

    300 V

    TelevisionCRT

  • Heater voltage

    6.3 V

    TelevisionCRT

  • Heater current

    300 mA

    TelevisionCRT

Data set 03

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Capacitance

  • Grid No.1 capacitance

    7 pF

  • External conductive coating to final accelerator capacitance

    1200 pF

    Maximum

Other

  • Grid No.2 operating voltage

    300 V

  • Grid No.1 cutoff voltage range

    40 to 80 V

  • Final accelerator minimum voltage

    9000 V

  • Final accelerator maximum voltage

    14000 V

  • Maximum grid No.2 voltage

    500 V

  • Maximum negative grid No.1 voltage

    150 V