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

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Tube-number record

6F18

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6F18 is a tube type in the TubeDatabase archive (class: Variable Mu H.F. Pentode). Recorded specifications: brand Ediswan Mazda, construction Pentode, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 2.25 W. The archive does not yet hold a photographed example of this type.

BrandEdiswan Mazda
ClassVariable Mu H.F. Pentode
BaseNoval (B9A)
Filament6.3 V @ 200 mA

Construction

Primary TypePentode
EnvelopeGlass
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated—for parallel operation

Absolute Maximum Ratings

Plate Voltage250 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical Operation175 V4400220000—12 mA
Cut-off / Reduced Transconductance175 V100———

Datasheets

Datasheet: 6F18.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 Dissipation2.25 W
    Grid 2 Voltage250 V
    H-C Voltage150 V

    Audio Performance

    Key Features
    • Variable mu
    • H.F. Pentode
    • Parallel heater operation
    • AM/FM Receiver application