TH 477
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BrandTHOMSON-CSF
ClassTriode Vapotron
Construction
Primary TypeTriode
EnvelopeGlass and Metal (Vapotron)
Base MaterialSpecial vapor radiator
SectionsSingle
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Plate Voltage15000 V
Plate Dissipation40000 W
Grid 1 Voltage-1500 V
Cathode Current50000 mA
Audio Performance
Key Features
- Vapotron (vaporization cooling)
- High power oscillator or amplifier
- Special TH-CSF patented radiator
- Thoriated tungsten direct heating filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Classe C Télégraphie - 15kV | 15000V | 30000 | - | 23 | 5800mA |
| Classe C Télégraphie - 12kV | 12000V | 30000 | - | 23 | 6500mA |
| Classe C Téléphonie - Modulation Anode | 11000V | 30000 | - | 23 | 3200mA |
| Auto-oscillateur Industriel | 13000V | 30000 | - | 23 | 5400mA |
Application Notes
The TH 477 is an emission triode with water vaporization cooling, used as an oscillator or HF/LF amplifier up to 30 MHz.
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