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Specialized - Cathode Ray ·CathodeRay

DG1074

Philips/Mullard DG-series cathode-ray instrument tube intended for oscillographic and measurement display, with manufacturer-defined electrostatic focusing, deflection, screen, and accelerating characteristics for type DG1074.

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

Description

Oscilloscope CRT with electrostatic focusing and deflection; sparse source drawing.

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
5000 V

Flat-face post-accelerated CRT for oscillography with green medium-persistence screen. Screen variant: green, medium persistence.

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

Characteristics

  • Focusing method

    Electrostatic

  • Deflection method

    Double electrostatic

  • Screen fluorescence

    Green

Application

  • Application

    Oscilloscope / oscillography display

Other

  • Post-acceleration voltage maximum

    4000 V

Data set 02

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Main accelerating voltage

    2000 V

  • Post-acceleration voltage

    4000 V

  • Focusing-grid voltage

    400 to 720 V

  • Maximum post-acceleration voltage

    5000 V

  • Maximum main accelerating voltage

    2500 V

  • Maximum heater-cathode voltage

    125 V

Characteristic

  • Deflection sensitivity N1 without post-acceleration

    0.32 to 0.38 mm/V

  • Deflection sensitivity N2 without post-acceleration

    0.24 to 0.3 mm/V

  • Deflection sensitivity N1 with post-acceleration

    0.25 to 0.31 mm/V

  • Deflection sensitivity N2 with post-acceleration

    0.19 to 0.25 mm/V

Data set 03

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Screen fluorescence

    Green

    Published datasheet value

  • Persistence

    Medium

    Published datasheet value

  • Focusing

    Electrostatic

    Published datasheet value

  • Deflection

    Double electrostatic symmetrical

    Published datasheet value

  • Grid No.1 capacitance

    4.6 pF

    Published datasheet value

  • Deflection-plate capacitance

    1.9 pF

    Published datasheet value

Other

  • Grid No.2 and No.4 voltage

    2000 V

    Published datasheet value

  • Grid No.3 voltage

    400 to 700 V

    Published datasheet value

  • Negative grid No.1 cut-off voltage

    45 to 75 V

    Published datasheet value

  • Maximum grid No.2 and No.4 voltage

    - to 2500 V

    Published datasheet value

  • Maximum cathode-heater voltage

    - to 125 V

    Published datasheet value