Tube-number record
B329/12AU7
0 archive entries
BrandMarconi
ClassDouble Triode
BaseNoval (B9A)
Filament6.3 V @ 0.3 mA
Construction
Primary TypeDual triode
EnvelopeTubular
Sections2
Filament / Heater
Heater Notes12-6V Indirectly Heated
Absolute Maximum Ratings
Plate Voltage300 V
Cathode Current20 mA
H-C Voltage180 V
Audio Performance
Key Features
- Indirectly Heated
- Commercial equivalent of CV491
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Characteristics (Per Section) | 250 V | 2200 | 7700 | 17 | 10.5 mA |
| Typical Operation (Voltage Amp) | 250 V | — | 100000 | — | — |
0 results