Tube-number record
8T39
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BrandNEC
ClassTriode
BaseCoaxial
Construction
Primary TypeTriode
EnvelopeGlass/Metal (Vapour Cooled Anode)
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Warm-up Time1s
Absolute Maximum Ratings
Plate Voltage10000 V
Plate Dissipation10000 W
Grid 1 Voltage-1000 V
Cathode Current2700 mA
Audio Performance
Power Output22000 W
Key Features
- Vapour Cooled
- Thoriated tungsten filament
- High transconductance
- Ring-sealed grid terminal
- Low lead inductance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Power Amplifier and Oscillator-Class C Telegraphy | 9000 V | 18000 | — | 40 | 2500 mA |
| AF Power Amplifier and Modulator-Class B | 8000 V | 18000 | — | 40 | 4000 mA |
Application Notes
Designed for use as an amplifier, modulator or oscillator in AM broadcast transmitters and industrial heating services. Maximum ratings apply up to 30 Mc/s.
Datasheets
Datasheet: 8T39.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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