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

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KF1 vacuum tube outline illustration

Tube-number record

KF1

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KF1 is a tube type in the TubeDatabase archive (class: H.F. Pentode). Recorded specifications: brand Philips Miniwatt, construction Pentode, socket 5-pin, and maximum plate voltage 135 V. The archive does not yet hold a photographed example of this type.

BrandPhilips Miniwatt
ClassH.F. Pentode
Base5-pin

Construction

Primary TypePentode
EnvelopeGlass
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage135 V
Grid 2 Voltage135 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
H.F. Amplifier (High Voltage)135 V180090000016003 mA
H.F. Amplifier (Low Voltage)90 V1000150000015001.1 mA

Application Notes

Recommended for use as an H.F. or Z.F. amplifier. Use as an audio amplifier or detector is only recommended if the speaker is external to avoid microphonic effects.

Datasheets

Datasheet: KF1.pdf

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

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    Audio Performance

    Key Features
    • H.F.- and Z.F.-Amplifier
    • Low Anode-Grid capacitance
    • Battery operation
    • High amplification at low voltages