Tube-number record
25C6GA
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BrandTung-Sol
ClassBeam Pentode
BaseOctal
Filament25 V @ 0.3 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeGlass Bulb
SectionsSingle
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage200 V
Plate Dissipation12.5 W
Grid 2 Voltage200 V
H-C Voltage180 V
Audio Performance
Typical THD10%
Power Output6 W
Key Features
- Coated Unipotential Cathode
- High power sensitivity
- High power output at comparatively low DC supply voltages
- Any mounting position
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 145 V | 7000 | 9400 | — | 58 mA |
| Class A1 Amplifier | 200 V | 7100 | 18300 | — | 61 mA |
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