ELL 80
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BrandTELEFUNKEN
ClassAF-twin power pentode
BaseNoval
Filament6.3V @ 550mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsDouble
Filament / Heater
Heater NotesIndirectly heated, Parallel supply
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation6 W
Grid 2 Voltage300 V
Cathode Current40 mA
H-C Voltage20 V
Audio Performance
Typical THD5%
Power Output8.5 W
Key Features
- NF-Doppel-Leistungspentode
- Vorldufige technische Daten
- 2-Kanal oder Gegentaktschaltungen
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A (per system) | 250V | 6000 | 40000 | 17 | 24mA |
| Push-pull Class AB (both systems) | 250V | - | - | - | 42mA |
| Push-pull Class B (both systems) | 250V | - | - | - | 22mA |
Application Notes
For 2 channel or push-pull circuits. Special precautions must be taken to prevent the tube from becoming dislodged.
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