Tube-number record
12AU7A
32 archive entries
12AU7A is a tube type in the TubeDatabase archive (class: Double Triode). Recorded specifications: brand MAZDA BELVU, construction Triode, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 2.75 W. The archive holds 32 photographed examples of this type.
BrandMAZDA BELVU
ClassDouble Triode
BaseNoval (B9A)
Filament6.3 V @ 300 mA
Construction
Primary TypeTriode
EnvelopeA 22-2
SectionsDouble
Filament / Heater
Heater NotesAlimentation en série ou en parallèle
Absolute Maximum Ratings
Plate Voltage300 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 | 100 V | 3100 | 6500 | 20 | 11.8 mA |
| Class A1 | 250 V | 2200 | 7700 | 17 | 10.5 mA |
Application Notes
En montage déphaseur, la limite de résistance entre filament et cathode est de 150 kOhms.
Datasheets
Datasheet: 12AU7A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
