U54
0 Tubes in archive
BrandMarconi
ClassRectifier
BaseInternational octal
Filament5V @ 2.8mA
Construction
Primary TypeIndirectly heated
Rectifier TypeBi-Phase
EnvelopeDome top tubular
Sections2
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage500 V
Cathode Current250 mA
Audio Performance
Key Features
- Indirectly heated
- Bi-phase rectifier
- Dome top tubular bulb
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Capacitor input | 500V | - | - | - | 250mA |
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