Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Cathode Ray ·CathodeRay

T983Z

Sixteen-inch high-resolution radar CRT with magnetic deflection, electrostatic focusing, aluminized orange very-long-persistence screen, and approximately 15 kV nominal EHT for sustained radar presentation.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
B12A
Socket code
-
Base pins
12
Nominal heater
6.3 V / 300 mA

Description

Sixteen-inch high-resolution radar cathode-ray tube with magnetic deflection, electrostatic focus, aluminized very-long-persistence orange screen, and 15 kV nominal EHT. Z / EVS.009 orange, very-long persistence

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
B12A
Socket code
-
Base pins
12
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

B12A - 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
18000 V

Maximum final-anode/PDA voltage mapped to MaxPlateVoltage.

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

1971 English Electric Valve

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Heater voltage

    6.3 V

  • Heater current

    300 mA

  • Minimum anode 2/anode 4 voltage

    8 kV

  • Maximum anode 2/anode 4 voltage

    18 kV

  • Maximum positive anode 3 voltage

    700 V

  • Maximum negative anode 3 voltage

    500 V

  • Maximum anode 1 voltage

    500 V

  • Maximum heater-cathode voltage

    150 V

  • Maximum mean cathode current

    150 uA

  • Typical anode 2/anode 4 voltage

    15 kV

  • Deflection angle

    50 deg

Characteristic

  • Screen characteristic

    Z / EVS.009 orange, very-long persistence

Capacitance

  • Grid to all other electrodes capacitance

    12 pF

  • Cathode to all other electrodes capacitance

    12 pF