Tube-number record
B339/12AX7
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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
Plate Dissipation1 W
Cathode Current8 mA
H-C Voltage180 V
Audio Performance
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