Tube-number record
3L030K
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BrandTungsram
ClassTransmitting Triode
Construction
Primary TypeTriode
EnvelopeExternal Anode
Sections1
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Plate Voltage2500 V
Plate Dissipation300 W
Grid 1 Voltage-300 V
Cathode Current400 mA
Audio Performance
Key Features
- Air-cooled
- VHF/TV Transmitting tube
- Directly heated
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| HF-C-Amplifier (Anode modulated telephony) - Common Cathode | 2000 V | 10000 | — | 32 | 335 mA |
| HF-C-Amplifier (Unmodulated telegraphy) - Common Cathode | 2500 V | 10000 | — | 32 | 260 mA |
| HF-C-Oscillator | 1750 V | 10000 | — | 32 | 340 mA |
Application Notes
Used in VHF and TV transmitters. Maximum plate dissipation is 300W under telegraphy conditions.
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