Tube-number record
A 31-20 W
0 archive entries
A 31-20 W is a tube type in the TubeDatabase archive (class: TV-picture tube). Recorded specifications: brand TELEFUNKEN, construction Display / CRT, base Glass, socket Miniature 7-pin (B7G), and maximum plate voltage 12000 V. The archive does not yet hold a photographed example of this type.
BrandTELEFUNKEN
ClassTV-picture tube
BaseMiniature 7-pin (B7G)
Filament11 V @ 68 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGrey glass
Base MaterialGlass
SectionsSingle-gun
Filament / Heater
MaterialIndirectly heated
Heater NotesLow power (0.75 W)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Cathode drive | 11000 V | — | — | — | — |
Application Notes
Television picture tube intended for battery or line operation. Cathode drive operation is typical. Heater current of 68 mA is suitable for 11V power supplies.
Datasheets
Datasheet: A31-20W.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
0 results