LS1
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BrandTelefunken
ClassPentode
BaseSolder-in
Filament19V @ 50mA
Construction
Primary TypePentode
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesOxide cathode, indirectly heated
Absolute Maximum Ratings
Plate Voltage200 V
Plate Dissipation1.5 W
Grid 2 Voltage200 V
Cathode Current10 mA
Audio Performance
Power Output0.55 W
Key Features
- Luftfahrtrohre
- Indirectly heated cathode
- For sender circuits
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Anodenruhestrom | 200V | - | - | - | 9mA |
| Characteristics | 90V | 1500 | - | - | 5mA |
| Electron-coupled circuit | 160V | - | - | - | 2.1mA |
Application Notes
Maximum ratings are for a limited life of approx 50 hours. For normal life, cathode current should not exceed 6 mA. The tube is intended to be soldered directly into the circuit.
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