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

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Tube-number record

6221

0 archive entries

6221 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Sonotone Corporation, construction Triode, socket Subminiature, maximum plate voltage 165 V, and maximum plate dissipation 3.3 W. The archive does not yet hold a photographed example of this type.

BrandSonotone Corporation
ClassTriode
BaseSubminiature
Filament6.3 V @ 175 mA

Construction

Primary TypeTriode
EnvelopeT-3
SectionsSingle

Filament / Heater

Warm-up Time20s
Heater NotesAC or DC

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A Amplifier100 V58004655278.5 mA

Application Notes

The Type 6221 is a medium-mu triode designed for applications where reliable performance under conditions of extreme vibration and shock is essential.

Datasheets

Datasheet: 6221.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 Voltage
    165 V
    Plate Dissipation3.3 W
    Grid 1 Voltage-55 V
    Cathode Current22 mA
    H-C Voltage200 V

    Audio Performance

    Key Features
    • Reliable performance under extreme vibration and shock
    • Close tolerance on filament current
    • Resistance to vibration frequencies up to 2000 cycles
    • Flexible Leads