Tube-number record
BW 189
0 archive entries
BW 189 is a tube type in the TubeDatabase archive (class: Transmitting Triode). Recorded specifications: brand Marconi's Wireless Telegraph Company Limited, construction Triode, maximum plate voltage 12000 V, and maximum plate dissipation 35000 W. The archive does not yet hold a photographed example of this type.
BrandMarconi's Wireless Telegraph Company Limited
ClassTransmitting Triode
Construction
Primary TypeTriode
EnvelopeWater-cooled anode
SectionsSingle
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Plate Voltage12000 V
Plate Dissipation35000 W
Cathode Current70000 mA
Audio Performance
Key Features
- Water-cooled anode
- Thoriated tungsten filament
- External grid and filament seal air cooling required
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| HF AMPLIFIER AND OSCILLATOR | 9000 V | 27500 | — | 34 | 2000 mA |
Application Notes
The valve must be operated at marked filament voltage. Reduced ratings (Va=8kV) up to 50 Mc/s.
Datasheets
Datasheet: BW189.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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