T977D
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BrandEnglish Electric Valve Co. Ltd.
ClassRadar Tube
BaseB.S.448-B12A
Filament6.3V @ 300mA
Construction
Primary TypeCathode Ray Tube
EnvelopeGlass
Base MaterialPlastic
SectionsSingle
Filament / Heater
Heater NotesSuitable for series or parallel operation
Absolute Maximum Ratings
Plate Voltage15500 V
Grid 2 Voltage600 V
Grid 1 Voltage-250 V
Cathode Current0.15 mA
H-C Voltage200 V
Audio Performance
Key Features
- 12-inch diameter
- Flicker-free images
- Improved resolution
- High E.H.T. voltage
- Aluminised screen
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Radar Display | 15000V | - | - | - | 0.05mA |
Application Notes
Specifically designed for radar displays with transistor or valve amplifiers; the T977D version is optimized for flicker-free computer read-out at low repetition frequencies.
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