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Tube Database (7,341 tube types · 1,270 archive entries)

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HK 254 vacuum tube outline illustration

Tube-number record

HK 254

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HK 254 is a tube type in the TubeDatabase archive (class: General Purpose Triode). Recorded specifications: brand Heintz and Kaufman, construction Triode, base Not specified, socket Jumbo, maximum plate voltage 4000 V, and maximum plate dissipation 100 W. The archive does not yet hold a photographed example of this type.

BrandHeintz and Kaufman
ClassGeneral Purpose Triode
BaseJumbo

Construction

Primary TypeTriode
EnvelopeGlass
Base MaterialNot specified
SectionsSingle

Filament / Heater

MaterialThoriated Tungsten

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class C Unmodulated4000 V——25125 mA
Class C Plate Modulated3000 V——25140 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

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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Manufacturers

Brands

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    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