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Specialized - Cathode Ray ·CathodeRay

DN711

Philips flat-face oscilloscope CRT for oscillography, using electrostatic beam control. Manufacturer documentation provides heater, focusing and deflection, capacitance, scan sensitivity, screen, and operating data; selected variants use post-deflection acceleration.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 95 mA

Description

Flat-face post-deflection-acceleration cathode-ray oscilloscope tube. The source provides CRT heater, focusing/deflection, capacitance, scan/sensitivity and operating data where published.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
95 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

No fixed ratings are recorded for this section.

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

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

  • Useful screen diameter

    68 mm

    Useful screen diameter 68 mm

  • Heater voltage Vp

    6.3 V

    Heater voltage Vp = 6.3 V

  • Heater current If

    95 mA

    Heater current If = 95 mA

  • Grid No

    5.7 pF

    Grid No.1 to all other electrodes CB1 = 5.7 pF

  • Cathode to all other electrodes Ck

    3 pF

    Cathode to all other electrodes Ck = 3.0 pF

  • Post accelerator voltage VB

    1200 V

    Post accelerator voltage VB6 = 1200 V

  • Second accelerator voltage VB

    300 V

    Second accelerator voltage VB4 = 300V

  • First accelerator voltage V

    1200 V

    First accelerator voltage V82 = 1200 V

  • Beam current IL

    10 A

    Beam current IL = 10A

  • Line width l.w

    0.65 mm

    Line width l.w. = 0.65 mm

  • Post accelerator voltage Vg b

    1200 V

    Post accelerator voltage Vg b = 1200 V

  • Focusing voltage Vg

    20 to 150 V

    Focusing voltage Vg3 = 20 to 150 V

  • First accelerator voltage Vg

    1200 V

    First accelerator voltage Vg2 = 1200 V

  • Negative grid No

    1 V

    Negative grid No.1 volt-

  • of focused spot -Vg

    30 to 80 V

    of focused spot -Vg1 = 30 to 80 V

  • Grid No

    1 V

    Grid No.1 voltage

  • Useful screen diameter

    68 mm

    Useful screen diameter

  • Post-deflection acceleration present

    1

    Source explicitly describes post-deflection acceleration

Other

  • Post• accelerator = max

    2500 V

    Post• accelerator = max. 2500 V

  • Second accelerator = max

    2100 V

    Second accelerator = max. 2100 V

  • Focusing voltage = max

    1000 V

    Focusing voltage = max. 1000 V

  • First accelerator = max

    1600 V

    First accelerator = max. 1600 V

  • grid No

    4 A

    grid No.4 and any de- = max. 500 V

  • grid No

    500 V

    grid No.4 and any de- = max. 500 V

  • cathode positive Vkf(k pos.) = max

    100 V

    cathode positive Vkf(k pos.) = max. 100 V

  • cathode negative Vkf(k neg.) = max

    15 V

    cathode negative Vkf(k neg.) = max.. 15 V

  • Cathode current Ik = max

    200 uA

    Cathode current Ik = max. 200 µARMS)

  • Mrel =Re

    7 A

    Mrel =Re7a five deflection factor