Tube-number record
304B
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BrandWestern Electric
ClassTriode
Base4-pin
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage1250 V
Plate Dissipation50 W
Grid 1 Voltage-225 V
Cathode Current100 mA
Audio Performance
Power Output140 W
Key Features
- Air-cooled
- Ultra high frequency operation
- Interchangeable with 304A
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Average Characteristics | 1250 V | 2000 | 5500 | 11 | 40 mA |
| Class B Audio Amplifier (per pair) | 1250 V | — | — | — | 100 mA |
| Class C RF Oscillator | 1250 V | — | — | — |
Application Notes
Designed for ultra high frequencies. Grid and plate terminals at top of bulb require cooling lugs for operation above 30 megacycles. Free circulation of air must be provided.
Datasheets
Datasheet: 304B.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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