Tube-number record
EF 804S
0 archive entries
EF 804S is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand AEG, construction Pentode, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 1 W. The archive does not yet hold a photographed example of this type.
BrandAEG
ClassPentode
BaseNoval (B9A)
Filament6.3 V @ 170 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly DC or AC heated
Absolute Maximum Ratings
Plate Voltage300 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Measured Values | 250 V | 2000 | 2000000 | 38 | 3.2 mA |
| AF Resistance-Coupled Amplifier (Pentode) | 250 V | — | — | 210 | 0.61 mA |
| AF Resistance-Coupled Amplifier (Triode) | 250 V | — | — | 31 |
Application Notes
Specifically designed for low-noise audio frequency amplification.
Datasheets
Datasheet: EF804S.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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