Tube-number record
31D12
0 archive entries
31D12 is a tube type in the TubeDatabase archive (class: Cathode-ray Tube). Recorded specifications: brand Associated Electrical Industries Limited, construction Display / CRT, socket Noval (B9A), and maximum plate voltage 15000 V. The archive does not yet hold a photographed example of this type.
BrandAssociated Electrical Industries Limited
ClassCathode-ray Tube
BaseNoval (B9A)
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass, 8.5 inch diagonal
SectionsSingle
Filament / Heater
Heater NotesConnected at chassis end if used in series chain
Absolute Maximum Ratings
Plate Voltage15000 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Industrial monitoring | 12000 V | — | — | — | — |
Application Notes
The socket for the B9A/D button base should not be rigidly mounted; it should have flexible leads and be allowed to move freely.
Datasheets
Datasheet: 31D12.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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