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

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B 228 vacuum tube outline illustration

Tube-number record

B 228

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B 228 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Philips Miniwatt, construction Triode, socket Special / none, maximum plate voltage 150 V, and maximum plate dissipation 0.75 W. The archive does not yet hold a photographed example of this type.

BrandPhilips Miniwatt
ClassTriode
BaseSpecial / none

Construction

Primary TypeTriode
EnvelopeGlass

Filament / Heater

Absolute Maximum Ratings

Plate Voltage150 V
Plate Dissipation0.75 W
Cathode Current6 mA

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Normal150 V120023000282 mA

Application Notes

Audion with transformer coupling or L.F. amplifier with transformer coupling.

Datasheets

Datasheet: B228.pdf

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

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    Audio Performance

    Key Features
    • Detector with transformer coupling
    • L.F. amplifier with transformer coupling