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

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UAF 42 vacuum tube outline illustration

Tube-number record

UAF 42

0 archive entries

UAF 42 is a tube type in the TubeDatabase archive (class: Diode-Pentode). Recorded specifications: brand Philips, construction Multi-section, socket Rimlock, maximum plate voltage 250 V, and maximum plate dissipation 2 W. The archive does not yet hold a photographed example of this type.

BrandPhilips
ClassDiode-Pentode
BaseRimlock
Filament12.6 V @ 0.1 mA

Construction

Primary TypeMulti-section
EnvelopeGlass
SectionsDouble

Filament / Heater

Heater NotesIndirect heating, series supply

Absolute Maximum Ratings

Plate Voltage250 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Pentode section as HF/IF amplifier100 V1700850000182.8 mA
Pentode section as HF/IF amplifier170 V2000900000185 mA
Pentode section as HF/IF amplifier200 V2000100000018

Application Notes

Can be used without special precautions against microphonic effect in circuits where input voltage is greater than or equal to 10mV for 50mW output.

Datasheets

Datasheet: UAF42.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 W
    Grid 2 Voltage250 V
    Grid 1 Voltage-1.3 V
    Cathode Current10 mA
    H-C Voltage150 V

    Audio Performance

    Key Features
    • Variable mutual conductance
    • Indirectly heated
    • Suitable for RF, IF, or AF amplification
    • Internal diode section for detection
    5 mA