Tube-number record
MA 12/15
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BrandPhilips
ClassTriode
Construction
Primary TypeTriode
EnvelopeGlass with water-cooled anode
SectionsSingle
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage12000 V
Plate Dissipation15000 W
Audio Performance
Power Output42000 W
Key Features
- Water-cooled anode
- Directly heated tungsten filament
- High power transmitter triode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| L.F. class A amplification | 12000 V | 7500 | 1867 | 14 | 1000 mA |
| L.F. class B amplification (two valves) | 12000 V | 7500 | — | 14 | 5340 mA |
| H.F. class C telegraphy | 12000 V | — | — | — |
Application Notes
Used as Modulator, H.F. and L.F. amplifier in water-cooled systems.
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