Tube-number record
12CA5
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BrandTUNG-SOL
ClassBeam Pentode
BaseMiniature 7-pin (B7G)
Filament12.6 V @ 600 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeT-5 1/2
Base MaterialGlass
SectionsSingle
Filament / Heater
Warm-up Time11s
Heater NotesThermal characteristics controlled for 600mA series operation.
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
- High sensitivity at low voltage
- Controlled heater warmup
- 600mA series heater
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 110 V | 8100 | 16000 | — | 32 mA |
| Class A1 Amplifier | 125 V | 9200 | 15000 | — | 37 mA |
Application Notes
Designed for audio-frequency power output stage in series heater television and radio receivers.
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