Tube-number record
DAF 191
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BrandVEB Röhrenwerk Anna Seghers
ClassDiode and Pentode for AF Amplification
BaseMiniature 7-pin (B7G)
Construction
Primary TypeMulti-section
EnvelopeGlass
Sections2
Filament / Heater
MaterialDirectly Heated
Absolute Maximum Ratings
Plate Voltage90 V
Plate Dissipation0.15 W
Grid 2 Voltage90 V
Cathode Current2.5 mA
Audio Performance
Key Features
- Battery-operated
- Small size
- Dual section (Diode/Pentode)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Section | 67.5 V | 700 | 600000 | 18.18 | 2.2 mA |
Application Notes
Designed for AF amplification in battery receivers.
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