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

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Tube-number record

6BN5

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6BN5 is a tube type in the TubeDatabase archive (class: Output Pentode). Recorded specifications: brand Philips, construction Pentode, socket Noval (B9A), and maximum plate voltage 300 V. The archive does not yet hold a photographed example of this type.

BrandPhilips
ClassOutput Pentode
BaseNoval (B9A)
Filament6.3 V @ 200 mA

Construction

Primary TypePentode
EnvelopeT6 1/2
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated cathode

Absolute Maximum Ratings

Plate Voltage300 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A, Single Tube200 V3200—1122.5 mA
Class A, Single Tube225 V3200—1126 mA
Class AB, Push-Pull250 V———40 mA

Application Notes

Commonly used as an output pentode in audio amplifiers. A reregistration (1339A) in 1956 modified the pinout connections.

Datasheets

Datasheet: 6BN5.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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    Grid 2 Voltage300 V
    Cathode Current35 mA
    H-C Voltage100 V

    Audio Performance

    Typical THD5.5%
    Power Output7 W
    Key Features
    • Small button noval base
    • Coated unipotential cathode
    • High power sensitivity
    Class B, Push-Pull250 V———10 mA