C3E
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BrandSiemens
ClassNF-, HF-Pentode
BaseRel stv 9a
Filament18V @ 240mA
Construction
Primary TypePentode
EnvelopeGlass
Filament / Heater
Heater NotesIndirect, parallel feeding
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation5 W
Grid 2 Voltage300 V
Grid 1 Voltage-1.3 V
Cathode Current45 mA
H-C Voltage120 V
Audio Performance
Key Features
- NF-Pentode
- HF-Pentode
- Oxide Cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 100V | 2500 | 900000 | - | 8.5mA |
| Pentode | 220V | 4400 | 500000 | - | 18.5mA |
| Pentode | 300V | 3700 | 900000 | - | 15mA |
| Triode | 300V | 4400 | 5900 | 26 | 14.5mA |
Application Notes
Heizart: indirekt, Parallelspeisung
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