Tube-number record
EF85
0 archive entries
EF85 is a tube type in the TubeDatabase archive (class: R.F. Pentode). Recorded specifications: brand Philips, construction Pentode, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 2.5 W. The archive does not yet hold a photographed example of this type.
BrandPhilips
ClassR.F. Pentode
BaseNoval (B9A)
Filament6.3 V @ 300 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated, AC or DC, parallel or series supply
Absolute Maximum Ratings
Plate Voltage250 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| R.F. or I.F. amplifier | 250 V | 6000 | 600000 | 26 | 10 mA |
| R.F. or I.F. amplifier (resistor feed 18k) | 250 V | 6000 | 600000 | — | 10 mA |
| R.F. or I.F. amplifier (resistor feed 22k) | 250 V | 6000 | 600000 | — |
Datasheets
Datasheet: EF85.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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