Tube-number record
KL 5
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ClassOutput pentode
Construction
Primary TypePentode
Envelopeglass
Sections1
Filament / Heater
Materialdirectly-heated
Absolute Maximum Ratings
Plate Voltage200 V
Plate Dissipation2 W
Grid 2 Voltage200 V
Grid 1 Voltage-0.2 V
Cathode Current12 mA
Audio Performance
Typical THD10%
Power Output0.53 W
Key Features
- Mica dampers for low microphony
- Low current consumption
- Directly-heated
- Balanced circuit suitable
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Single output valve | 90 V | 1400 | 180000 | — | 4.8 mA |
| Single output valve | 135 V | 1700 | 135000 | — | 8.5 mA |
| Balanced output (2 valves) | 90 V | — | — | — | 1 mA |
| Balanced output (2 valves) | 135 V | — | — | — | 2 mA |
Application Notes
Directly-heated output valve for 2V battery receivers, delivering reasonably high output on very low current consumption.
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