Tube-number record
7255
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BrandWestinghouse
ClassPower Amplifier Triode
Construction
Primary TypeTriode
EnvelopeGlass with integral water jacket
Sections1
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage9200 V
Plate Dissipation9000 W
Grid 1 Voltage-1500 V
Cathode Current2000 mA
Audio Performance
Key Features
- High perveance structure
- Integral water jacket with internal spiral water diverter
- Spring loaded thoriated tungsten filament
- High power density
- High efficiency design
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Telegraphy | 5000 V | — | — | 22 | 1610 mA |
| Class C Telegraphy | 9000 V | — | — | 22 | 2000 mA |
Application Notes
Especially designed for operation with lower voltage power supplies. Suitable for induction and dielectric heating applications.
Datasheets
Datasheet: 7255.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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