Tube-number record
U54
0 archive entries
U54 is a tube type in the TubeDatabase archive (class: Rectifier). Recorded specifications: brand Marconi, year 1955, construction Indirectly heated, socket Octal, and maximum plate voltage 500 V. The archive does not yet hold a photographed example of this type.
BrandMarconi
ClassRectifier
BaseOctal
Filament5 V @ 2.8 mA
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 | 500 V | — | — | — | 250 mA |
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