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Tube Database (7,341 tube types · 1,270 archive entries)

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EF 83 vacuum tube outline illustration

Tube-number record

EF 83

0 archive entries

EF 83 is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand TELEFUNKEN, construction Pentode, base Glass, 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.

BrandTELEFUNKEN
ClassPentode
BaseNoval (B9A)
Filament6.3 V @ 200 mA

Construction

Primary TypePentode
EnvelopeGlass
Base MaterialGlass
SectionsSingle

Filament / Heater

Heater NotesSerien- oder Parallelspeisung

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Meßwerte250 V16001250000103 mA
Geregelter NF-Verstärker200 V105—1051.8 mA

Application Notes

Die Röhre darf ohne spezielle Maßnahmen gegen Mikrophonie und Brumm in Schaltungen verwendet werden, die für eine Eingangsspannung von > 2mVeff eine Lautsprecherleistung von 50 mW ergeben.

Datasheets

Datasheet: EF83.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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Manufacturers

Brands

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    Plate Voltage300 V
    Plate Dissipation1 W
    Grid 2 Voltage300 V
    Grid 1 Voltage-1.3 V
    Cathode Current6 mA
    H-C Voltage100 V

    Audio Performance

    Typical THD2.3%
    Power Output0.05 W
    Key Features
    • regelbare NF-Pentode
    • indirekt geheizt
    • low microphony
    • low hum