Tube-number record
T-25P/31
0 archive entries
T-25P/31 is a tube type in the TubeDatabase archive (class: Transmitting Triode). Recorded specifications: brand UNITRA LAMINA, construction Triode, socket Special / none, maximum plate voltage 15000 V, and maximum plate dissipation 25000 W. The archive does not yet hold a photographed example of this type.
BrandUNITRA LAMINA
ClassTransmitting Triode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeGlass/Metal
Sections1
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage15000 V
Plate Dissipation25000 W
Grid 1 Voltage-1000 V
Cathode Current45000 mA
Audio Performance
Power Output86500 W
Key Features
- Thoriated tungsten cathode
- Air-cooled
- High power transmitting triode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Amplifier Class C (Grounded Cathode) | 15000 V | 56000 | 1135 | 58 | 7350 mA |
| RF Amplifier Class B (Grounded Cathode) | 15000 V | 56000 | 1910 | 58 | 5000 mA |
| Anode Modulation | 10000 V | 56000 | 1180 | 58 | 5600 mA |
| TV Amplifier (Grid Modulation) | 5500 V | 56000 | 442 | 58 | 7600 mA |
Application Notes
Designed for TV transmitters, VHF amplifiers, and modulators. Electrode leads must fit within concentric circles of specified diameters.
0 results