TH 308
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BrandThomson-CSF
ClassHigh Gain Triode
BasePlanar concentric terminals
Filament6.3V @ 5500mA
Construction
Primary TypeTriode
EnvelopeCeramic Metal
SectionsSingle
Filament / Heater
MaterialOxide coated
Warm-up Time3s
Heater NotesIndirectly heated. 6.3V nominal; reduced to 5.7V for high frequency operation to compensate for back bombardment.
Absolute Maximum Ratings
Plate Voltage2200 V
Plate Dissipation700 W
Grid 1 Voltage-200 V
Cathode Current600 mA
Audio Performance
Key Features
- Forced air cooled
- Ceramic-metal construction
- Planar structure
- High gain
- Linear amplifier for TV translators
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Linear TV Translator (Vision and Sound) | 1800V | 45000 | 1777.78 | 80 | 200mA |
Application Notes
Specifically designed for highly linear amplifier operating up to 1000 MHz without grid current in TV translators handling both sound and vision signals.
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