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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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B 403 vacuum tube outline illustration

Tube-number record

B 403

0 archive entries

B 403 is a tube type in the TubeDatabase archive (class: Power Triode). Recorded specifications: brand Philips, construction Triode, and maximum plate voltage 150 V. The archive does not yet hold a photographed example of this type.

BrandPhilips
ClassPower Triode

Construction

Primary TypeTriode
EnvelopeGlass
Sections1

Filament / Heater

Absolute Maximum Ratings

Plate Voltage150 V

Audio Performance

Key Features
  • Low internal resistance
  • Directly heated
  • Output triode for loud speaker reception

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A Amplifier150 V15002000315 mA

Application Notes

B 403 is an output lamp for speaker reception with high sound intensity. The internal resistance is very low and therefore this lamp type adapts well to speakers with low AC resistance.

Datasheets

Datasheet: B403.pdf

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

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