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Specialized - Cathode Ray ·CathodeRay

DG93

Philips/Mullard DG-series cathode-ray instrument tube for oscillographic and measurement display, with manufacturer-defined electrostatic beam focusing, deflection, screen, and accelerating characteristics for type DG93.

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

Description

The Philips DG93 is a high-vacuum oscillography crt with green.

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
1200 V

High-vacuum CRT with electrostatic focusing and double electrostatic deflection. Screen variant: green.

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

1938 Philips Miniwatt Vacuum Tube Catalog

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Screen diameter

    103 mm

  • Greatest overall length

    350 mm

  • Greatest length without pins

    320 mm

  • Maximum second-anode voltage

    1200 V

  • Maximum first-anode voltage

    500 V

  • Maximum grid bias for ray suppression

    -40 V

  • Second-anode voltage

    1000 V

  • First-anode voltage

    400 V

Characteristic

  • Deflection sensitivity N1

    0.4 mm/V

  • Deflection sensitivity N2

    0.3 mm/V

Capacitance

  • Grid capacitance

    6 pF

  • Deflection-plate capacitance D1-D1'

    4 pF

  • Deflection-plate capacitance D2-D2'

    5.5 pF

Data set 02

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 text

    Screen fluorescence and persistence

Data set 03

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Capacitance

  • Capacitances Cg

    8 pF

    Capacitances Cg = 8 pF

Data set 04

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Anode voltage

    1000 V

  • Auxiliary anode voltage

    400 V

Characteristic

  • First deflection sensitivity

    0.4 mm/V

  • Second deflection sensitivity

    0.31 mm/V

  • Grid-cathode capacitance

    7.5 pF