E702B
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BrandEnglish Electric Valve Company Ltd
ClassDirect View Storage Tube
Base31 pin small button thirty five (JEDEC no E31-36)
Filament6.3V @ 600mA
Construction
Primary TypeDirect view storage tube
EnvelopeGlass bulb with cavity caps
SectionsTwo electron guns: writing and flood
Filament / Heater
Heater NotesBoth writing and flood guns use 6.3V heaters.
Absolute Maximum Ratings
Plate Voltage11000 V
Grid 2 Voltage200 V
Grid 1 Voltage200 V
Cathode Current1 mA
H-C Voltage125 V
Audio Performance
Key Features
- Direct view storage
- High stored writing speeds
- Ruggedized construction
- Electrostatic deflection
- Aluminized P20 phosphor
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Writing Gun | -1800V | - | - | - | 0.049mA |
| Flood Gun | 10000V | - | - | - | 0.48mA |
Application Notes
Designed for airborne and other radar applications where vibration and low pressure conditions may be encountered.
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