25CA5
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BrandTUNG-SOL
ClassPENTODE
Base7-pin miniature
Filament25V @ 0.3mA
Construction
Primary TypeBeam Pentode
EnvelopeGlass Bulb
Sections1
Filament / Heater
Heater NotesAC OR DC
Absolute Maximum Ratings
Plate Voltage130 V
Plate Dissipation5 W
Grid 2 Voltage130 V
H-C Voltage200 V
Audio Performance
Typical THD6%
Power Output1.5 W
Key Features
- Miniature Construction
- Coated Unipotential Cathode
- High Power Sensitivity
- Low Plate and Screen Voltages
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 110V | 8100 | 16000 | - | 42mA |
| Class A1 Amplifier | 125V | 9200 | 15000 | - | 37mA |
Application Notes
Designed primarily for use in the audio frequency power output stage of television and radio receivers.
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