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Tube Database (7,341 tube types · 1,270 archive entries)

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TH 326 vacuum tube outline illustration

Tube-number record

TH 326

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TH 326 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Thomson-CSF, construction Triode, maximum plate voltage 2000 V, and maximum plate dissipation 270 W. The archive does not yet hold a photographed example of this type.

BrandThomson-CSF
ClassTriode
Filament5 V @ 2000 mA

Construction

Primary TypeTriode
EnvelopeCeramic-metal
SectionsSingle

Filament / Heater

MaterialOxide coated
Warm-up Time180s
Heater NotesIndirect heating. Heater voltage must be reduced in HF operation to compensate for cathode back bombardment.

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A Linear Amplifier for TV Translator1800 V800003125250140 mA

Application Notes

Cooling airflow must be established before electrode voltage and maintained for at least 3 minutes after heater removal.

Datasheets

Datasheet: TH326.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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    Absolute Maximum Ratings

    Plate Voltage2000 V
    Plate Dissipation270 W
    Grid 1 Voltage-50 V
    Cathode Current250 mA

    Audio Performance

    Key Features
    • Forced air cooled
    • Ceramic-metal high gain triode
    • Planar structure
    • Operates without grid current in TV translators