Tube-number record
P 300-1
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BrandBrown Boveri
ClassTransmitting Pentode
BaseSpecial / none
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage3000 V
Plate Dissipation400 W
Grid 2 Voltage600 V
Grid 1 Voltage-600 V
Cathode Current600 mA
Audio Performance
Power Output1980 W
Key Features
- Thoriated tungsten filament
- Direct heating
- Forced air cooling required
- Suppressor grid (G3) connection at top cap and base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Classe C sans modulation (12 Mc/s) | 3000 V | 8000 | — | 4 | 530 mA |
| Classe B modulation AF (3000V) | 3000 V | — | — | — | 450 mA |
Application Notes
The tube must be mounted vertically. Glass temperature must not exceed 200°C. Thoriated tungsten filaments are fragile; avoid shocks and vibrations.
Datasheets
Datasheet: P300-1.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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