Tube-number record

T980H, T980N, T980X

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BrandEnglish Electric Valve Co. Ltd.

ClassOscilloscope Tube

BaseCRT / special base

Filament6.3 V @ 340 mA

Construction

Primary TypeDisplay / CRT

EnvelopeGlass

Base MaterialPlastic/Metal

SectionsSingle gun with P.D.A. mesh

Filament / Heater

Heater NotesIndirectly Heated, Oxide Coated Cathode

Absolute Maximum Ratings

Plate Voltage15000 V

Plate Dissipation0.005 W

Grid 2 Voltage3300 V

Grid 1 Voltage-200 V

Cathode Current0.3 mA

H-C Voltage200 V

Audio Performance

Key Features

Post deflection accelerator mesh
Internal spiral coating
Anode modulator electrodes
Aluminised screen
Flat Clear Glass Faceplate

Typical Operation

Mode	Plate V	Gm (µmhos)	Rp (Ω)	µ	Plate mA
Anode 1/3 at 1kV	12000 V	—	—	—	0.015 mA
Anode 1/3 at 1.5kV	12000 V	—	—	—	0.015 mA
Anode 1/3 at 3kV	12000 V	—	—	—	0.015 mA

Application Notes

Specifically designed for wide band, high speed oscilloscope applications. Anode modulation plates give zero spot movement under normal operating conditions.

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