ECF 8070
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BrandTELEFUNKEN
ClassTriode / Pentode
BasePico 9 - Noval
Filament6.3V @ 380mA
Construction
Primary TypeTriode / Pentode
EnvelopeGlass
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesDC-AC-heating connected in parallel
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation2 W
Grid 2 Voltage150 V
Cathode Current18 mA
H-C Voltage100 V
Audio Performance
Key Features
- Reliability
- Long life
- Tight tolerances
- Cathode free from interface
- Special cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode (Measuring Values) | 100V | 5500 | - | 17 | 12mA |
| Pentode (Measuring Values) | 170V | 12000 | 350000 | 70 | 10mA |
| Triode as Oscillator | 190V | 3500 | 8200 | - | 12mA |
| Pentode as IF-amplifier | 170V | 12000 | 350000 | - | 10mA |
Application Notes
The guaranteed life applies only if the filament voltage is kept in the limits of +/- 5% absolute.
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