8T39
0 Tubes in archive
BrandNEC
ClassTriode
BaseCustom (Ring-sealed grid terminal)
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 | 9000V | 18000 | - | 40 | 2500mA |
| AF Power Amplifier and Modulator-Class B | 8000V | 18000 | - | 40 | 4000mA |
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.
Datasheet Viewer
Loading datasheet...
Sort by
Showing 1 to 0 of 0 results