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Tube Tinker — Electron Tube Database
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Specialized - Cathode Ray ·CathodeRay

DP132

Philips oscillography CRT with electrostatic focusing and double electrostatic deflection. Its screen gives a short blue flash followed by a long greenish-yellow afterglow for persistent waveform viewing.

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

Description

Oscillography cathode-ray tube with electrostatic focusing and double electrostatic deflection; blue short plus greenish-yellow long 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
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

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

Other

  • Maximum Plate Voltage

    2500 V

  • Anode/Grid 2-4 Operating Voltage

    2000 V

  • Maximum Grid 2-4 Voltage

    2500 V

Characteristic

  • Focusing Method

    Electrostatic

  • Deflection Method

    Double electrostatic

  • Screen Variant

    blue short plus greenish-yellow long persistence

Data set 02

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

  • Heater voltage

    6.3 V

    Published heater rating

  • Heater current

    300 mA

    Published heater rating

Capacitance

  • Grid No.1 capacitance

    4.6 pF

    OscilloscopeCRT

  • Cathode capacitance

    6 pF

    OscilloscopeCRT

  • Deflection-plate capacitance

    2.5 pF

    OscilloscopeCRT

  • Inter-deflection capacitance

    0.35 pF

    OscilloscopeCRT

Data set 03

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Screen diameter

    13 cm

    Published datasheet value

  • Focusing

    Electrostatic

    Published datasheet value

  • Deflection

    Double electrostatic symmetrical

    Published datasheet value

Other

  • Grid No.2 and No.4 voltage

    2000 V

    Published datasheet value

  • Focusing voltage

    350 to 650 V

    Published datasheet value

  • Negative grid No.1 cut-off voltage

    45 to 90 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