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

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BS204 vacuum tube outline illustration

Tube-number record

BS204

0 archive entries

BS204 is a tube type in the TubeDatabase archive (class: TR Tube). Recorded specifications: brand English Electric Valve Company Limited, construction Other / special, base Tin or silver plated flange faces, and socket Waveguide. The archive does not yet hold a photographed example of this type.

BrandEnglish Electric Valve Company Limited
ClassTR Tube
BaseWaveguide

Construction

Primary TypeOther / special
EnvelopeWaveguide
Base MaterialTin or silver plated flange faces
SectionsSingle primer

Filament / Heater

Absolute Maximum Ratings

Cathode Current0.15 mA

Application Notes

The primer supply voltage must be applied at least 5 seconds before the tube is required to operate. The primer current must be limited by a series resistance of 5.5 Mohms, of which at least 0.5 Mohms must be adjacent to the primer terminal.

Datasheets

Datasheet: BS204.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
    • Broad-band
    • Single primer
    • S-Band
    • Flange faces tin or silver plated