Tube-number record
TBL6/4000
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BrandPhilips
ClassTriode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeGlass
Base MaterialMetal/Glass
SectionsSingle
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Plate Voltage8000 V
Plate Dissipation1700 W
Grid 1 Voltage-1250 V
Cathode Current1200 mA
Audio Performance
Key Features
- Industrial R.F. generators
- Thoriated tungsten filament
- Forced air cooling
- Directly heated
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical characteristics | 5000 V | 7000 | — | 23 | 240 mA |
| R.F. class C oscillator (Continuous) | 7000 V | — | — | — | 900 mA |
| R.F. class C oscillator (Intermittent) | 6000 V | — | — | — |
Application Notes
Mounting position: Vertical with anode up or down. At frequencies above 4 Mc/s both grid terminals should be connected in parallel. Air flow requirements: 1.6 m3/min at 1.3kW dissipation, 2.1 m3/min at 1.7kW dissipation.
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