Tube-number record
UF 11
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BrandTelefunken
ClassPentode
Filament15 V @ 100 mA
Construction
Primary TypePentode
EnvelopeSteel
Sections1
Filament / Heater
Heater NotesIndirectly heated, GW-Heizung
Absolute Maximum Ratings
Plate Voltage300 V
Grid 2 Voltage300 V
Grid 1 Voltage-1.3 V
Cathode Current10 mA
H-C Voltage200 V
Audio Performance
Key Features
- Regelbare HF-, ZF- und NF-Pentode
- Steel envelope
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| HF/ZF-Verstarker | 200 V | 2200 | 1500000 | — | 6 mA |
| HF/ZF-Verstarker | 100 V | 1700 | 800000 | — | 2.7 mA |
Application Notes
Variable-mu pentode for RF, IF and AF amplification in AC/DC sets.
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