E 280 F
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BrandSiemens
ClassBreitband-Pentode
BaseNoval
Filament6.3V @ 315mA
Construction
Primary TypePentode
EnvelopeDIN 41539, Form A, Nenngröße 45
SectionsSingle
Filament / Heater
Heater NotesIndirekt durch Wechsel- oder Gleichstrom, Parallelspeisung
Absolute Maximum Ratings
Plate Voltage220 V
Plate Dissipation4 W
Grid 2 Voltage180 V
Grid 1 Voltage-50 V
Cathode Current30 mA
H-C Voltage60 V
Audio Performance
Key Features
- Long life (> 10,000 hours)
- Reliability (p = 1.5 per 1000 hrs)
- Tight tolerances
- Shock and vibration resistance
- Special cathode without interface layer
- Heater-filament switching stability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Operation | 190V | 26000 | 400000 | 60 | 20mA |
| Triode Operation | 160V | 33000 | 1800 | 60 | 24mA |
Application Notes
Particularly suitable for LF, IF and HF amplifiers in pre- and output stages, cathode followers, mixers, oscillators and frequency multipliers up to 300 MHz.
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