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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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12C8 vacuum tube outline illustration

Tube-number record

12C8

0 archive entries

12C8 is a tube type in the TubeDatabase archive (class: Duplex Diode Pentode). Recorded specifications: brand TUNG-SOL, year 1943, construction Multi-section, socket Octal, maximum plate voltage 300 V, and maximum plate dissipation 2.05 W. The archive does not yet hold a photographed example of this type.

BrandTUNG-SOL
ClassDuplex Diode Pentode
BaseOctal
Filament12.6 V @ 150 mA

Construction

Primary TypeMulti-section
EnvelopeMetal Shell, MT-8
SectionsTriple (Pentode + 2 Diodes)

Filament / Heater

Heater NotesUnipotential Cathode

Absolute Maximum Ratings

Plate Voltage300 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A1 Amplifier250 V1325600000—10 mA

Application Notes

Minimum Diode Current Per Plate with 10 Volts DC applied: 0.8 mA.

Filters

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Manufacturers

Brands

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    Plate Dissipation2.05 W
    Grid 2 Voltage125 V

    Audio Performance

    Key Features
    • Duplex Diode Pentode
    • Metal Shell
    • Unipotential Cathode