Tube-number record
TB 04/8
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BrandPhilips
ClassTriode
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage450 V
Plate Dissipation30 W
Cathode Current120 mA
Audio Performance
Power Output23 W
Key Features
- Oscillator
- H.F. amplifier
- Thoriated tungsten cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| H.F. class C telegraphy | 400 V | 2000 | — | 6.5 | 130 mA |
| H.F. class B telephony | 400 V | — | — | — | 97 mA |
| H.F. class C anode modulation | 400 V | — | — | — | 125 mA |
Application Notes
Commonly used in oscillator and high frequency amplifier circuits.
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