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BrandHughes Aircraft Company
ClassDirect-Display Half-tone Storage Tube
BaseDiheptal 14-pin (JETEC B11-38)
Filament6.3V @ 600mA
Construction
Primary TypeDirect-Display Storage Tube
Envelope5-inch Flat face glass
Base MaterialSmall shell diheptal
SectionsWriting gun and Flood gun
Filament / Heater
Heater NotesBoth writing gun and flood gun use 6.3V heaters with nominal 600mA current.
Absolute Maximum Ratings
Plate Voltage11000 V
Grid 2 Voltage200 V
Grid 1 Voltage150 V
H-C Voltage180 V
Audio Performance
Key Features
- Half-tone storage
- Direct-display
- Controllable persistence
- Electrostatic deflection
- Electrostatic focus
- Aluminized P20 screen
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Writing gun test conditions | 10000V | - | - | - | - |
Application Notes
The Tonotron features storage of half-tones and brightness sufficient for high ambient-light levels. Erasure can be instantaneous or gradual. Storage time is limited to the order of a minute by ion currents.
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