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Tube Database (7,341 tube types · 1,270 archive entries)

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E702B vacuum tube outline illustration

Tube-number record

E702B

0 archive entries

E702B is a tube type in the TubeDatabase archive (class: Direct View Storage Tube). Recorded specifications: brand English Electric Valve Company Ltd, construction Display / CRT, socket 31-pin button, and maximum plate voltage 11000 V. The archive does not yet hold a photographed example of this type.

BrandEnglish Electric Valve Company Ltd
ClassDirect View Storage Tube
Base31-pin button
Filament6.3 V @ 600 mA

Construction

Primary TypeDisplay / CRT
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 Voltage

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Writing Gun-1800 V———0.049 mA
Flood Gun10000 V———0.48 mA

Application Notes

Designed for airborne and other radar applications where vibration and low pressure conditions may be encountered.

Datasheets

Datasheet: E702B.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

Filters

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Manufacturers

Brands

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    11000 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