ECC40
22 Tubes in archive
ClassDouble Triode
Construction
Primary TypeDouble Triode
EnvelopeGlass
Sections2
Filament / Heater
Absolute Maximum Ratings
Plate Dissipation1.5 W
Audio Performance
Key Features
- Low non-linear distortion
- Suitable for high-quality audio preamplifiers
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Resistance-coupled Amplifier (Example) | 120V | - | - | - | 4.5mA |
| Zero Bias Example | 60V | - | - | - | 5mA |
Application Notes
The text emphasizes that for high-quality resistance-coupled amplifiers, a plate supply voltage (Vb) of at least 300V is preferred over the standard 250V to minimize distortion and avoid frequency response issues at high load resistances.
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