Tube-number record
TH 338
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BrandThomson-CSF
ClassTriode
BaseCoaxial
Filament6.3 V @ 5.5 mA
Construction
Primary TypeTriode
EnvelopeCeramic-Metal
Base MaterialMetal
SectionsSingle
Filament / Heater
MaterialOxide Coated
Warm-up Time180s
Heater NotesIndirectly heated. Heater voltage must be reduced in HF operation to compensate for back bombardment.
Absolute Maximum Ratings
Plate Voltage2500 V
Plate Dissipation1200 W
Grid 1 Voltage-200 V
Cathode Current600 mA
Audio Performance
Key Features
- Forced air cooled
- Ceramic-metal construction
- High gain
- Planar structure
- Designed for TV translators
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Linear Amplifier (TV Translator) | 2400 V | 45000 | — | 80 | 400 mA |
Application Notes
Specifically designed for highly linear amplifier operating up to 1000 MHz without grid current in T.V. translators handling both sound and vision signals.
Datasheets
Datasheet: TH338.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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