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

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CL33 vacuum tube outline illustration

Tube-number record

CL33

0 archive entries

CL33 is a tube type in the TubeDatabase archive (class: Output Pentode). Recorded specifications: brand Mullard, construction Pentode, socket Octal, maximum plate voltage 250 V, and maximum plate dissipation 9 W. The archive does not yet hold a photographed example of this type.

BrandMullard
ClassOutput Pentode
BaseOctal
Filament33 V @ 200 mA

Construction

Primary TypePentode
EnvelopeGlass
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage250 V
Plate Dissipation9 W

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A200 V90003500013.545 mA

Datasheets

Datasheet: CL33.pdf

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

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Brands

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    Grid 2 Voltage
    250 V
    Grid 1 Voltage-1.3 V
    Cathode Current70 mA
    H-C Voltage175 V

    Audio Performance

    Typical THD10%
    Power Output4 W
    Key Features
    • High-sensitivity
    • DC/AC mains-operated