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

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Tube-number record

402 P.

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402 P. is a tube type in the TubeDatabase archive (class: Output Triode). Recorded specifications: brand Cossor, construction Triode, socket 7-pin (non-miniature), maximum plate voltage 200 V, and maximum plate dissipation 8 W. The archive does not yet hold a photographed example of this type.

BrandCossor
ClassOutput Triode
Base7-pin (non-miniature)
Filament40 V @ 0.2 mA

Construction

Primary TypeTriode
EnvelopeGlass
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated; designed for series running in A.C./D.C. receivers.

Absolute Maximum Ratings

Plate Voltage200 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A150 V750013301020 mA

Application Notes

Specifically designed for series filament operation in A.C./D.C. receivers where available voltage is typically around 200V.

Datasheets

Datasheet: 402P.pdf

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

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    Plate Dissipation8 W

    Audio Performance

    Key Features
    • Super power class
    • Control grid top cap to avoid A.C. hum
    • Indirectly heated