Tube-number record
T980H, T980N, T980X
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T980H, T980N, T980X is a tube type in the TubeDatabase archive (class: Oscilloscope Tube). Recorded specifications: brand English Electric Valve Co. Ltd., construction Display / CRT, base Plastic/Metal, socket CRT / special base, maximum plate voltage 15000 V, and maximum plate dissipation 0.005 W. The archive does not yet hold a photographed example of this type.
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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