EF 804
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BrandTelefunken
ClassNF-Pentode
BasePico 9 (Noval)
Filament6.3V @ 200mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirekt geheizt; Serien- oder Parallelspeisung
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation1.5 W
Grid 2 Voltage200 V
Cathode Current6 mA
H-C Voltage100 V
Audio Performance
Key Features
- Kling- und brumm-arm
- Indirekt geheizt
- Serien- oder Parallelspeisung
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard Measurement Point | 250V | 2000 | 2000000 | 38 | 3mA |
Application Notes
Diese Röhre darf ohne besondere Maßnahmen gegen Mikrophonie und Brumm in Kraftverstärkern verwendet werden.
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