Tube-number record
TH 485
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BrandThomson-CSF
ClassTriode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeMetal-Ceramic with Vapotron radiator
Base MaterialSpecial contacts
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage15000 V
Plate Dissipation65000 W
Grid 1 Voltage-2000 V
Cathode Current75000 mA
Audio Performance
Key Features
- Vaporization cooled (Vapotron)
- Direct heating
- Vertical operation anode down
- 65 kW dissipation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Telegraphy | 13000 V | 65000 | 384.6 | 25 | 13500 mA |
| Class C Telephony (Plate Modulated) | 12000 V | 65000 | — | 25 | 7300 mA |
Application Notes
Le tube TH 485 est une triode d’émission a refroidissement par vaporisation d’eau, utilisable en amplificateur BF ou HF.
Datasheets
Datasheet: TH485.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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