HK 254
0 Tubes in archive
BrandHeintz and Kaufman
ClassGeneral Purpose Triode
Base4-pin Jumbo
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 | 4000V | - | - | 25 | 125mA |
| Class C Plate Modulated | 3000V | - | - | 25 | 140mA |
| Class B Audio (2 Tubes) | 3000V | - | 36400 | - | 200mA |
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.
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