Tube-number record
E2668B1
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BrandToshiba
ClassDirect Viewing Storage Tube
Base4-pin
Filament6.3 V @ 0.6 mA
Construction
Primary TypeOther / special
Envelope6-inch rectangular flat-face glass
Base MaterialSpecial
SectionsWriting part and Reading part
Filament / Heater
Heater NotesWriting part heater 6.3V AC/DC; Reading part heater 6.5V DC
Absolute Maximum Ratings
Plate Voltage4500 V
Grid 2 Voltage4500 V
Grid 1 Voltage-400 V
Cathode Current30 mA
H-C Voltage180 V
Audio Performance
Key Features
- BHD (Black matrix, Hybrid mesh, Dot screen) technology
- Character storage capability
- Normal oscilloscope tube function
- Rectangular flat-face
- Electrostatic deflection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Writing gun | 3000 V | — | — | — | — |
| Reading gun | — | — | — | — | 30 mA |
Application Notes
Heater voltage of the reading gun is 6.5V DC with one side connected to cathode. Hybrid electrode voltage must always be kept as the highest voltage in the tube to avoid screen degradation.
Datasheets
Datasheet: E2668B1.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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