Tube-number record
12C8
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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
Plate Dissipation2.05 W
Grid 2 Voltage125 V
Audio Performance
Key Features
- Duplex Diode Pentode
- Metal Shell
- Unipotential Cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 250 V | 1325 | 600000 | — | 10 mA |
Application Notes
Minimum Diode Current Per Plate with 10 Volts DC applied: 0.8 mA.
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