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

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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B339/12AX7 vacuum tube outline illustration

Tube-number record

B339/12AX7

0 archive entries

B339/12AX7 is a tube type in the TubeDatabase archive (class: High-Mu Double Triode). Recorded specifications: brand Marconi, year 1955, 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.

BrandMarconi
ClassHigh-Mu Double Triode
BaseNoval (B9A)
Filament12.6 V @ — mA

Construction

Primary TypeDual triode
EnvelopeTubular
Sections2

Filament / Heater

Heater NotesIndirectly heated

Absolute Maximum Ratings

Plate Voltage300 V

Filters

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Manufacturers

Brands

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    Plate Dissipation1 W
    Cathode Current8 mA
    H-C Voltage180 V

    Audio Performance