Tube-number record
12AU7A
32 archive entries
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
Plate Dissipation2.75 W
Grid 1 Voltage-100 V
Cathode Current20 mA
H-C Voltage180 V
Audio Performance
Key Features
- Cathodes séparées
- Chauffage indirect
- Préamplificateur A.F.
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.
