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

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UF89 vacuum tube outline illustration

Tube-number record

UF89

0 archive entries

UF89 is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand Philips, 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.

BrandPhilips
ClassPentode
BaseNoval (B9A)
Filament12.6 V @ 100 mA

Construction

Primary TypePentode
EnvelopeGlass
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated; series supply; AC or DC

Absolute Maximum Ratings

Plate Voltage250 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
H.F. or I.F. amplifier170 V44004000002112 mA
Operating characteristics (Example 1)200 V3850550000—11.1 mA

Application Notes

In some cases control grid current may occur; if not permissible, negative grid bias should be increased to at least 1.5 V.

Datasheets

Datasheet: UF89.pdf

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

Filters

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Manufacturers

Brands

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    Plate Dissipation2.25 W
    Grid 2 Voltage250 V
    Cathode Current16.5 mA
    H-C Voltage150 V

    Audio Performance

    Key Features
    • Variable mutual conductance
    • High frequency amplifier
    • Intermediate frequency amplifier