ML-891
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BrandMachlett
ClassPower Triode
BaseSpecial
Construction
Primary TypeTriode
EnvelopeGlass
Base MaterialMetal/Ceramic
SectionsSingle
Filament / Heater
MaterialPure-tungsten
Absolute Maximum Ratings
Plate Voltage12000 V
Plate Dissipation6000 W
Grid 1 Voltage-3000 V
Cathode Current2000 mA
Audio Performance
Key Features
- Water-cooled anode
- Pure-tungsten filament
- Designed for modulator, amplifier, or oscillator service
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Telegraphy | 8000V | - | - | 8.5 | 1100mA |
| Class C Telephony (Plate Modulated) | 6000V | - | - | - | 750mA |
| Class B A-F Power Amplifier (2 tubes) | 10000V | - | - | - | 2500mA |
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