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Specialized - Cathode Ray ·CathodeRay

DB93

Philips DB-series electrostatic cathode-ray instrument tube for oscillographic and measurement display, with manufacturer-defined screen persistence, focusing, deflection, and accelerating characteristics for type DB93.

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

Description

The Philips DB93 is a high-vacuum oscillography crt with blue.

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: blue.

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

    blue text

    Screen fluorescence and persistence

Data set 02

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 03

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

  • Chauffage:; indirect par C.A. Vf

    4 V

    Published datasheet condition

  • Heizung: indirekt durch If

    1 A

    Published datasheet condition

  • on a circle of

    50 mm

    Published datasheet condition

  • Published value

    2 A

    Published datasheet condition

  • Published value

    3 A

    Published datasheet condition

Other

  • Yu2

    1200 V

    Published datasheet condition

  • Val = nmax. 5C

    0 V

    Published datasheet condition

  • ~¥y = DEX. 200 ¥ RD

    1 w

    Published datasheet condition