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Specialized - Cathode Ray ·CathodeRay

DB71

Philips cathode-ray oscilloscope tube for oscillography, using electrostatic beam control. Manufacturer documentation provides screen, focusing and deflection, capacitance, sensitivity, rating, and operating data where published.

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

Description

High-vacuum oscillography cathode-ray tube with electrostatic deflection.

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

Characteristic

  • Heater Voltage

    4 V

  • Heater Current

    1 A

  • DeflectionMethod

    Electrostatic

Data set 02

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Second-anode voltage

    800 V

  • First-anode voltage

    150 to 350 V

  • Maximum second-anode voltage

    800 V

  • Maximum first-anode voltage

    350 V

Characteristic

  • Deflection sensitivity N1

    0.22 mm/V

  • Deflection sensitivity N2

    0.14 mm/V

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. ou C.C. Vf

    4 V

    Published datasheet condition

  • Published value

    2 a

    Published datasheet condition

  • Kepazititen ®p4

    65 PF

    Published datasheet condition

  • cD

    1 v

    Published datasheet condition

  • cD1v

    6.5 pF

    Published datasheet condition

  • CDZ'

    6.4 pF

    Published datasheet condition

  • Cpip1s

    7 pF

    Published datasheet condition

  • Cpapa

    0.85 pF

    Published datasheet condition

  • ®Dip1r - pepar

    3.7 PF

    Published datasheet condition

  • Va2

    800 V

    Published datasheet condition

  • Vai = 150

    350 V

    Published datasheet condition

  • Vg = 0

    30 V

    Published datasheet condition

  • N1

    0.22 mm

    Published datasheet condition

  • ) Measured 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

  • lo2

    800 V

    Published datasheet condition

  • Published value

    3 A

    Published datasheet condition

Other

  • ot

    1 ma

    Published datasheet condition

  • Va2 = max. 800 V vD1D1'p

    450 V

    Published datasheet condition

  • Val

    350 V

    Published datasheet condition

  • Val = max. 350 V VD2D2'p

    750 V

    Published datasheet condition

  • Vg =max. OV W,

    3 mW

    Published datasheet condition

  • ~-Vg

    200 V

    Published datasheet condition