Tube-number record
TA 5/4000
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BrandPhilips
ClassTransmitting Triode
Construction
Primary TypeTriode
EnvelopeWater-cooled
Sections1
Filament / Heater
Materialtungsten
Absolute Maximum Ratings
Plate Voltage5000 V
Plate Dissipation5000 W
Cathode Current1250 mA
Audio Performance
Power Output4000 W
Key Features
- water-cooled
- high output at lower anode voltage
- suitable for wavelengths down to 15 metres
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| H.F. class C telegraphy | 5000 V | 6000 | 2700 | 16 | 1250 mA |
Application Notes
For H.F. class C anode modulation (Heising system) the anode voltage should not exceed 4000 volts. Efficiency will be lower for wavelengths below 150 metres in Class B.
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