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

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CV4085 vacuum tube outline illustration

Tube-number record

CV4085

0 archive entries

CV4085 is a tube type in the TubeDatabase archive (class: AF Pentode). Recorded specifications: brand The M-O Valve Co. Ltd., construction Pentode, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 1 W. The archive does not yet hold a photographed example of this type.

BrandThe M-O Valve Co. Ltd.
ClassAF Pentode
BaseNoval (B9A)
Filament6.3 V @ 200 mA

Construction

Primary TypePentode
EnvelopeTubular
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated

Absolute Maximum Ratings

Plate Voltage300 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Pentode Connection250 V20002500000383 mA
Triode Connection250 V220016500364 mA

Application Notes

Suitable for use in low level, low frequency amplifiers under conditions of abnormal shock and vibration.

Datasheets

Datasheet: CV4085.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 Dissipation1 W
    Grid 2 Voltage250 V
    Cathode Current6 mA
    H-C Voltage100 V

    Audio Performance

    Key Features
    • Rugged
    • Low noise
    • Low hum
    • Low microphony
    • Vibration resistant