Tube-number record
7222
0 archive entries
7222 is a tube type in the TubeDatabase archive (class: Direct-Display Half-tone Storage Tube). Recorded specifications: brand Hughes Aircraft Company, construction Display / CRT, base Small shell diheptal, socket Diheptal, and maximum plate voltage 11000 V. The archive does not yet hold a photographed example of this type.
BrandHughes Aircraft Company
ClassDirect-Display Half-tone Storage Tube
BaseDiheptal
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
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
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Writing gun test conditions | 10000 V | — | — | — | — |
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.
Datasheets
Datasheet: 7222.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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