E 80 CF
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BrandSiemens
ClassTriode-Pentode
BaseNoval
Filament6.3V @ 330mA
Construction
Primary TypeTriode-Pentode
EnvelopeGlass
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesIndirectly heated, AC or DC, parallel supply
Absolute Maximum Ratings
Plate Voltage275 V
Plate Dissipation4.75 W
Grid 2 Voltage225 V
Grid 1 Voltage-100 V
Cathode Current18 mA
H-C Voltage100 V
Audio Performance
Power Output0.05 W
Key Features
- Long life
- High reliability
- Tight tolerances
- High shock and vibration resistance
- Heater switching stability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode | 100V | 5500 | 3250 | 18 | 14mA |
| Pentode HF Amplifier | 170V | 6200 | 400000 | 40 | 10mA |
| Pentode Mixer | 170V | 2400 | 500000 | - | 8.9mA |
Application Notes
Triode suitable for oscillators up to 300 MHz, multivibrators, and blocking oscillators. Pentode suitable for mixer stages, HF, and AF amplifiers.
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