TH 504
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BrandTHOMSON-CSF
ClassTransmitting Triode
BaseConcentric terminals
Construction
Primary TypeTriode
EnvelopeGlass
Base MaterialConcentric ceramic insulated
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage15000 V
Plate Dissipation150000 W
Grid 1 Voltage-1200 V
Cathode Current180000 mA
Audio Performance
Key Features
- Vapotron
- Transmitting Triode
- Vapor cooled radiator
- Concentric terminals
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Telegraphy | 15000V | 130000 | - | 80 | 29300mA |
| Class C Telephony (Carrier) | 12000V | 130000 | - | 80 | 22000mA |
| Class B AF Modulator (Per tube) | 12000V | - | - | - | 19000mA |
Application Notes
Transmitting triode used as C.W. oscillator, AF or RF power amplifiers. Anode can dissipate 150 kW.
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