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

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UL 41 vacuum tube outline illustration

Tube-number record

UL 41

0 archive entries

UL 41 is a tube type in the TubeDatabase archive (class: Output Pentode). Recorded specifications: brand Philips, construction Pentode, socket Rimlock, maximum plate voltage 250 V, and maximum plate dissipation 9 W. The archive does not yet hold a photographed example of this type.

BrandPhilips
ClassOutput Pentode
BaseRimlock
Filament45 V @ 100 mA

Construction

Primary TypePentode
EnvelopeGlass
Sections1

Filament / Heater

Heater NotesIndirect; series supply

Absolute Maximum Ratings

Plate Voltage250 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A100 V8000180001029 mA
Class A110 V8500180001032 mA
Class A170 V9500200001053 mA

Datasheets

Datasheet: UL41.pdf

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

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Manufacturers

Brands

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    Plate Dissipation9 W
    Grid 2 Voltage250 V
    Grid 1 Voltage-1.3 V
    Cathode Current75 mA
    H-C Voltage150 V

    Audio Performance

    Typical THD10%
    Power Output4.25 W
    Key Features
    • Indirectly heated
    • Series supply
    • Rimlock base