Tube-number record
NF 2
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BrandTelefunken
ClassHF-Pentode
BaseSide-contact (P-base)
Filament12.6 V @ 195 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesOxydkathode, indirekt geheizt
Absolute Maximum Ratings
Plate Voltage200 V
Plate Dissipation1 W
Grid 2 Voltage150 V
Cathode Current6 mA
H-C Voltage125 V
Audio Performance
Key Features
- Indirekt geheizt
- HF-Pentode
- Oxydkathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Normaler Arbeitspunkt | 200 V | 1700 | 1800000 | 4000 | 2 mA |
Application Notes
Einschaltspannung Anode (kalt) max. 400 V, Einschaltspannung Schirmgitter (kalt) max. 410 V.
Datasheets
Datasheet: NF2.pdf
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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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