Tube-number record
EF 804
0 archive entries
EF 804 is a tube type in the TubeDatabase archive (class: NF-Pentode). Recorded specifications: brand Telefunken, construction Pentode, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 1.5 W. The archive does not yet hold a photographed example of this type.
BrandTelefunken
ClassNF-Pentode
BaseNoval (B9A)
Filament6.3 V @ 200 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirekt geheizt; Serien- oder Parallelspeisung
Absolute Maximum Ratings
Plate Voltage300 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard Measurement Point | 250 V | 2000 | 2000000 | 38 | 3 mA |
Application Notes
Diese Röhre darf ohne besondere Maßnahmen gegen Mikrophonie und Brumm in Kraftverstärkern verwendet werden.
Datasheets
Datasheet: EF804.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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