Tube-number record
EFM 11
0 archive entries
EFM 11 is a tube type in the TubeDatabase archive (class: Pentode & Tuning Indicator). Recorded specifications: brand Philips, construction Pentode, base Steel, socket Side-contact (P-base), maximum plate voltage 300 V, and maximum plate dissipation 0.4 W. The archive does not yet hold a photographed example of this type.
BrandPhilips
ClassPentode & Tuning Indicator
BaseSide-contact (P-base)
Filament6.3 V @ 0.2 mA
Construction
Primary TypePentode
EnvelopeMetal/Glass
Base MaterialSteel
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated, parallel or series supply
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| L.F. Amplifier & Tuning Indicator (Max Gain) | 120 V | — | 700000 | — | 1 mA |
| L.F. Amplifier & Tuning Indicator (Tuning State) | 172 V | — | 3000000 | — | 0.58 mA |
Application Notes
Pentode for use as L.F. amplifier and tuning indicator. Suitable for parallel or series supply (AC or DC).
Datasheets
Datasheet: EFM11.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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