ML 4
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BrandMarconi
ClassAudio Power Triode
Filament4V @ 1mA
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesA.C. Mains Valve
Absolute Maximum Ratings
Plate Voltage200 V
Plate Dissipation5 W
Audio Performance
Key Features
- low magnification
- low impedance
- high conductance
- A.C. Mains
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical | 100V | - | - | - | 12mA |
| Typical | 150V | - | - | - | 18mA |
| Typical | 200V | - | - | - | 25mA |
| Characteristics at Ea 100, Eg 0 | 100V | 4200 | 2860 | 12 | - |
Application Notes
Small output valve, initial L.F. amplifier, or oscillator. The high conductance provides considerable stage gain. Output is sufficient for average domestic volume with a moving iron speaker.
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