Tube-number record
HK 254
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BrandHeintz and Kaufman
ClassGeneral Purpose Triode
BaseJumbo
Construction
Primary TypeTriode
EnvelopeGlass
Base MaterialNot specified
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage4000 V
Plate Dissipation100 W
Grid 1 Voltage-1000 V
Cathode Current225 mA
Audio Performance
Key Features
- Radiation cooled tantalum plate
- VHF efficiency
- High voltage operation
- No getter required
- Silver film protected grid seal
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Unmodulated | 4000 V | — | — | 25 | 125 mA |
| Class C Plate Modulated | 3000 V | — | — | 25 | 140 mA |
| Class B Audio (2 Tubes) | 3000 V | — | 36400 | — | 200 mA |
Application Notes
The Type 254 GAMMATRON is a medium mu universal triode featuring tantalum grid and plate structures, allowing for heavy overloads and high temperature exhaust during manufacture.
Datasheets
Datasheet: HK254.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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