ML-893A
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BrandMachlett
ClassPower Triode
BaseCustom Base
Construction
Primary TypeTriode
EnvelopeGlass / Water-Cooled Anode
Base MaterialMetal
SectionsSingle
Filament / Heater
MaterialPure-tungsten
Absolute Maximum Ratings
Plate Voltage20000 V
Plate Dissipation20000 W
Grid 1 Voltage-3000 V
Cathode Current4000 mA
Audio Performance
Key Features
- Pure-tungsten filament
- Water-cooled anode
- Supports single, three, or six-phase power supply
- Designed for modulator, amplifier, or oscillator use
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C R-F Power Amplifier and Oscillator | 18000V | - | - | - | 3600mA |
| Plate-Modulated R-F Power Amplifier | 12000V | - | - | - | 2000mA |
| Class B A-F Power Amplifier (2 tubes) | 18000V | - | - | - | 5500mA |
Application Notes
Full power operation permissible up to 5 MHz. At 40 MHz, voltage and input must be reduced to 50% of maximum ratings.
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