25T
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BrandEimac
ClassPower Triode
BaseSmall 4-pin
Construction
Primary Typetriode
EnvelopeGlass
Base MaterialSmall 4-pin, RMA type A4-5
Sections1
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage2000 V
Plate Dissipation25 W
Cathode Current75 mA
Audio Performance
Power Output112 W
Key Features
- Medium-mu
- Radiation cooled plate
- Thoriated tungsten filament
- Air convection cooling
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class-C Telegraphy | 2000V | 2500 | - | 25 | 63mA |
| Class-C Telegraphy | 1500V | 2500 | - | - | 67mA |
| Class-AB2 | 1250V | - | - | - | 24mA |
Application Notes
Intended for use as an amplifier, oscillator or modulator. Operates at a visible red color at maximum dissipation.
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