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

900W

Special-purpose cathode-ray display tube documented for type 900W, with manufacturer-defined screen, focusing, and deflection characteristics for technical visual display.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
11 V / 68 mA

Description

A short 10 cm diagonal flat-faced rectangular instrument cathode-ray tube with aluminised screen, mesh post-deflection acceleration and deflection blanking, intended for general-purpose and portable oscilloscopes.

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
11 V
Nominal heater current
68 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.

Instrument cathode-ray tube; CRT electrode ratings are preserved in parameters.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • FourthAnodeVoltageMax

    7000 V

  • FourthAnodeVoltageMin

    5000 V

  • ThirdAnodeVoltageMax

    700 V

  • ThirdAnodeVoltageMin

    500 V

  • FocusVoltageMax

    300 V

  • FirstAnodeVoltageMax

    700 V

  • FirstAnodeVoltageMin

    500 V

  • ControlGridVoltageMaxMagnitude

    200 V

  • GridToCathodeCircuitResistanceMax

    1 MOhm

  • YDeflectorPlateCircuitResistanceMax

    100 kOhm

  • XDeflectorPlateCircuitResistanceMax

    250 kOhm