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

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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4B28 vacuum tube outline illustration

Tube-number record

4B28

0 archive entries

4B28 is a tube type in the TubeDatabase archive (class: Gas Filled Rectifier). Recorded specifications: brand General Electric Co., construction Rectifier, socket Screw / Edison base, and maximum plate voltage 300 V. The archive does not yet hold a photographed example of this type.

BrandGeneral Electric Co.
ClassGas Filled Rectifier
BaseScrew / Edison base

Construction

Primary TypeRectifier
Rectifier TypeHalf-wave
EnvelopeGlass

Filament / Heater

MaterialThoriated Tungsten

Absolute Maximum Ratings

Plate Voltage300 V

Datasheets

Datasheet: 4B28.pdf

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

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    Cathode Current6000 mA

    Audio Performance

    Key Features
    • Convection cooling
    • Thoriated Tungsten Filament