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

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Tube-number record

7227

0 archive entries

7227 is a tube type in the TubeDatabase archive (class: Low Voltage Output Pentode). Recorded specifications: brand Brimar, construction Pentode, base Glass, socket Noval (B9A), maximum plate voltage 50 V, and maximum plate dissipation 2 W. The archive does not yet hold a photographed example of this type.

BrandBrimar
ClassLow Voltage Output Pentode
BaseNoval (B9A)
Filament26.5 V @ 170 mA

Construction

Primary TypePentode
EnvelopeT-6 1/2
Base MaterialGlass
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A1 Amplifier26.5 V310060001111 mA

Application Notes

Particularly suitable for use in the instrumentation, control and radio equipment of aircraft.

Datasheets

Datasheet: 7227.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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    Plate Voltage50 V
    Plate Dissipation2 W
    Grid 2 Voltage50 V
    Cathode Current20 mA
    H-C Voltage50 V

    Audio Performance

    Power Output0.07 W
    Key Features
    • Reliable service
    • Mobile or fixed equipment
    • High mechanical vibration and shock resistance
    • Operation from 24V battery