Tube-number record
DF 668
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BrandVEB Funkwerk Erfurt
ClassHF-Pentode
BaseSubminiature
Construction
Primary TypePentode
EnvelopeSubminiature
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage110 V
Plate Dissipation0.5 W
Grid 2 Voltage110 V
Grid 1 Voltage0.5 V
Audio Performance
Key Features
- Subminiature HF-Pentode
- Ahnlich 1 AD 4
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 90 V | 2300 | 350000 | 16 | 5.7 mA |
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