Tube-number record
25T
0 archive entries
BrandEimac
ClassPower Triode
Base4-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 | 2000 V | 2500 | — | 25 | 63 mA |
| Class-C Telegraphy | 1500 V | 2500 | — | — | 67 mA |
| Class-AB2 | 1250 V | — | — | — | 24 mA |
Application Notes
Intended for use as an amplifier, oscillator or modulator. Operates at a visible red color at maximum dissipation.
Datasheets
Datasheet: 25T.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
0 results