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

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306A vacuum tube outline illustration

Tube-number record

306A

0 archive entries

306A is a tube type in the TubeDatabase archive (class: Moderate-power, filamentary, suppressor-grid pentode). Recorded specifications: brand Western Electric, construction Pentode, base Medium, five-pin thrust type with bayonet pin, socket Special / none, maximum plate voltage 300 V, and maximum plate dissipation 15 W. The archive does not yet hold a photographed example of this type.

BrandWestern Electric
ClassModerate-power, filamentary, suppressor-grid pentode
BaseSpecial / none

Construction

Primary TypePentode
EnvelopeGlass
Base MaterialMedium, five-pin thrust type with bayonet pin
Sections1

Filament / Heater

Absolute Maximum Ratings

Plate Voltage300 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A Audio-Frequency Amplifier200 V37007000026032 mA
Class A Audio-Frequency Amplifier250 V40506200025043 mA
Class A Audio-Frequency Amplifier (Maximum)300 V415070000290

Application Notes

Used as an audio-frequency amplifier for power outputs up to 8 watts, radio-frequency amplifier, oscillator, modulator, and frequency multiplier. Suitable for high-frequency circuits up to 70 megacycles.

Datasheets

Datasheet: 306A.pdf

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

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    Plate Dissipation15 W
    Grid 2 Voltage300 V
    Grid 1 Voltage30 V
    Cathode Current60 mA

    Audio Performance

    Power Output8.8 W
    Key Features
    • Filamentary
    • Suppressor-grid pentode
    • Moderate power
    • Internal connection between suppressor and filament center
    • Top cap control grid
    48 mA