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

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DN41 vacuum tube outline illustration

Tube-number record

DN41

0 archive entries

DN41 is a tube type in the TubeDatabase archive (class: Double Diode-Output Pentode). Recorded specifications: brand Osram, construction Pentode, socket 7-pin (non-miniature), maximum plate voltage 250 V, and maximum plate dissipation 8 W. The archive does not yet hold a photographed example of this type.

BrandOsram
ClassDouble Diode-Output Pentode
Base7-pin (non-miniature)
Filament4 V @ 2.3 mA

Construction

Primary TypePentode
EnvelopeGlass (carbonised)
Sections3

Filament / Heater

Heater NotesIndirectly Heated

Absolute Maximum Ratings

Plate Voltage250 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Pentode Section250 V10000——32 mA

Application Notes

One diode normally operates as a detector feeding into the pentode grid while the other diode produces delayed A.V.C. Grid stopper of 100,000 ohms or anode stopper of 100 ohms recommended.

Filters

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Manufacturers

Brands

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    Plate Dissipation8 W
    Grid 2 Voltage250 V

    Audio Performance

    Key Features
    • Carbonised bulb
    • High sensitivity
    • Common cathode for all sections
    • Electrostatic screen between sections