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

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UF86 vacuum tube outline illustration

Tube-number record

UF86

0 archive entries

UF86 is a tube type in the TubeDatabase archive (class: Voltage Amplifying Pentode). Recorded specifications: brand Mullard, construction Pentode, base Glass, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 1 W. The archive does not yet hold a photographed example of this type.

BrandMullard
ClassVoltage Amplifying Pentode
BaseNoval (B9A)
Filament12.6 V @ 100 mA

Construction

Primary TypePentode
EnvelopeGlass
Base MaterialGlass
SectionsSingle

Filament / Heater

Heater NotesSuitable for series operation, a.c. or d.c.

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Pentode200 V20002500000383 mA

Application Notes

Specifically intended for early stages of high-gain audio amplifiers and microphone preamplifiers. Hum level is approximately 8uV-12uV.

Datasheets

Datasheet: UF86.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 Voltage250 V
    Plate Dissipation1 W
    Grid 2 Voltage200 V
    Cathode Current6 mA
    H-C Voltage150 V

    Audio Performance

    Typical THD5%
    Key Features
    • Low-noise
    • R.C. coupled a.f. voltage amplifier
    • Series connected heaters
    • Rigid electrode structure