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Specialized - Cathode Ray ·CathodeRay

DG72

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 DG72.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B12A
Base pins
-
Nominal heater
4 V / 1 A

Description

The Philips DG72 is a oscillography crt with green, medium persistence.

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
4 V
Nominal heater current
1 A
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
800 V

Electrostatic focusing/deflection CRT section; electrical/screen/deflection data retained in parameter rows.

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

  • Heater Voltage

    4 V

  • Heater Current

    1 A

  • Phosphor Variant

    green, medium persistence text

    Screen fluorescence and persistence

Data set 02

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

  • Chauffage: indirect par C.C. ou C.A. Vf

    4 V

    Published datasheet condition

  • Heizung: indirekt durch Wechsel~ If

    1 A

    Published datasheet condition

  • DG 7

    -2 v

    Published datasheet condition

  • DN 7

    -2 v

    Published datasheet condition

  • Heizung : indirekt durch Wechsel- Ifr

    1 A

    Published datasheet condition

  • Capac:.tances Cg

    7 pF

    Published datasheet condition

  • Kapazitdten °p

    5.5 pF

    Published datasheet condition

  • cD1

    6.5 pF

    Published datasheet condition

  • CD2

    6.5 pF

    Published datasheet condition

  • Cp2r

    4 a

    Published datasheet condition

  • Cp2r4a2

    12 pF

    Published datasheet condition

  • CD1D1'

    0.65 pF

    Published datasheet condition

  • Cpapa

    2.5 pF

    Published datasheet condition

  • Va2

    800 V

    Published datasheet condition

  • Val = 150

    350 V

    Published datasheet condition

  • Vg = 0~

    30 V

    Published datasheet condition

  • N1

    0.22 mm

    Published datasheet condition

  • N2

    0.14 mm

    Published datasheet condition

  • ) Kcasured on a circle of

    50 mm

    Published datasheet condition

  • Mesuré & un cercle de

    50 mm

    Published datasheet condition

  • Gemessen an einem Kreis von

    50 mm

    Published datasheet condition

  • CD'I

    5.5 pF

    Published datasheet condition

  • Chyr

    6.5 pF

    Published datasheet condition

  • Chyr = 6,5 pF Cpopar

    2.5 pF

    Published datasheet condition

  • Cpo = &

    5 pF

    Published datasheet condition

  • Cpo = &5 pF Cp1pit-pep2r

    7 pF

    Published datasheet condition

  • Line width v

    800 V

    Published datasheet condition

  • Epaigseur de la ligne E D2'g3

    0.9 mm

    Published datasheet condition

  • VDZ',gB

    800 V

    Published datasheet condition

  • Vg2 = 150

    -350 V

    Published datasheet condition

  • 1) Measured on a circle of

    50 mm

    Published datasheet condition

  • Voz193

    800 V

    Published datasheet condition

  • BEE R T

    7 V

    Published datasheet condition

  • Published value

    7.1953 A

    Published datasheet condition

  • Published value

    5 A

    Published datasheet condition

  • Published value

    6 A

    Published datasheet condition

Other

  • Va2 = max. 800 V VD1D1'p

    450 V

    Published datasheet condition

  • Val

    350 V

    Published datasheet condition

  • Val = max. 350V VD2D2'p

    750 V

    Published datasheet condition

  • Vg = max,

    200 V

    Published datasheet condition

  • VD2‘,g3

    800 V

    Published datasheet condition

  • VD2‘,g3 = max. 800 V VD1D1'p = mgx

    450 V

    Published datasheet condition

  • Vg2

    350 V

    Published datasheet condition

  • Vg2 = max. 350V VD2D2'p

    750 V

    Published datasheet condition

  • Vg1

    200 V

    Published datasheet condition

  • Vg1 = max. 200V Ry

    2 MΩ

    Published datasheet condition

  • Rg1

    1.5 MΩ

    Published datasheet condition