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

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ECC83/12AX7 vacuum tube outline illustration

Tube-number record

ECC83/12AX7

0 archive entries

ECC83/12AX7 is a tube type in the TubeDatabase archive (class: A.F. Double Triode). Recorded specifications: brand Ei-RC, construction Dual triode, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 1 W. The archive does not yet hold a photographed example of this type.

BrandEi-RC
ClassA.F. Double Triode
BaseNoval (B9A)
Filament6.3 V @ 300 mA

Construction

Primary TypeDual triode
EnvelopeGlass
Sections2

Filament / Heater

Heater NotesSerial or parallel supply, pins 9-(4+5) for 6.3V or 4-5 for 12.6V

Absolute Maximum Ratings

Plate Voltage300 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical characteristics100 V1250800001000.5 mA
Typical characteristics250 V1600625001001.2 mA

Application Notes

Can be used without precautions against microphony in equipment characterized by Vi >= 10mV for 50mW output, or Vi >= 100mV for 5W output.

Filters

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Manufacturers

Brands

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    Plate Dissipation1 W
    Grid 1 Voltage-50 V
    Cathode Current8 mA
    H-C Voltage180 V

    Audio Performance

    Power Output0.05 W
    Key Features
    • Low microphony
    • Serial or parallel heating