DAF11
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BrandTelefunken
ClassRegelbare NF-Pentode mit Diode
BaseStahlröhren-base (Y8)
Construction
Primary TypePentode-Diode
EnvelopeGlass
Base MaterialMetal
Sections2
Filament / Heater
MaterialDirectly Heated
Absolute Maximum Ratings
Plate Voltage150 V
Plate Dissipation0.6 W
Grid 2 Voltage150 V
Grid 1 Voltage-0.5 V
Cathode Current4 mA
Audio Performance
Key Features
- Directly heated
- Battery tube
- Variable-mu (Regelbare)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Section (Set 1) | 120V | 600 | 900000 | - | 1.4mA |
| Pentode Section (Set 2) | 90V | 550 | 700000 | - | 0.8mA |
Application Notes
The tubes are dimensioned for heating from a single-cell dry battery. A range of 1.4V down to 0.9V is permissible.
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