MPT4
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BrandMarconi
ClassPentode
Filament4V @ 1000mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation8 W
Grid 2 Voltage200 V
Audio Performance
Key Features
- High efficiency
- Indirectly heated
- Large output
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A | 250V | 4000 | - | 100 | 32mA |
Application Notes
Ideal output valve for three or four valve receivers having only one low frequency stage; operates moving coil or medium impedance moving iron speakers equally well.
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