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T982D

Twelve-inch high-resolution radar CRT with magnetic deflection, electrostatic focusing, aluminized long-persistence screen, and approximately 15 kV nominal EHT. Screen variants provide different orange or yellow-orange persistence characteristics.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: B12A
Socket code: -
Base pins: 12
Nominal heater: 6.3 V / 300 mA

Description

Twelve-inch high-resolution radar cathode-ray tube with magnetic deflection, electrostatic focus, aluminized screen, and 15 kV nominal EHT. D / EVS.007 yellow-orange, 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
D / EVS.007 yellow-orange, long persistence

Capacitance

Grid to all other electrodes capacitance
120 pF
Cathode to all other electrodes capacitance
120 pF