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

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DF33 vacuum tube outline illustration

Tube-number record

DF33

0 archive entries

DF33 is a tube type in the TubeDatabase archive (class: RF Pentode). Recorded specifications: brand Mullard, construction Pentode, socket Octal, and maximum plate voltage 110 V. The archive does not yet hold a photographed example of this type.

BrandMullard
ClassRF Pentode
BaseOctal

Construction

Primary TypePentode
EnvelopeGlass
SectionsSingle

Filament / Heater

MaterialDirectly heated

Absolute Maximum Ratings

Plate Voltage110 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
RF/IF Amplifier90 V7501500000—1.2 mA

Application Notes

Variable-mu r.f. pentode for use as a controlled r.f. or i.f. amplifier. Suitable for d.c. operation only.

Datasheets

Datasheet: DF33.pdf

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

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    Grid 2 Voltage110 V

    Audio Performance

    Key Features
    • Variable-mu
    • Low filament consumption
    • Controlled r.f. or i.f. amplifier