Tube-number record
E1566R
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BrandCompagnie Générale de T.S.F. (CSF)
ClassPower Triode
Construction
Primary TypeTriode
EnvelopeGlass with external radiator
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Warm-up Time30s
Absolute Maximum Ratings
Plate Voltage10000 V
Plate Dissipation6000 W
Cathode Current3200 mA
Audio Performance
Key Features
- Forced air cooling
- Thoriated tungsten filament
- Concentric grid output
- Grounded grid design suitability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| HF Amplifier Class B - Grounded Grid | 7000 V | 33000 | — | 44 | 2600 mA |
| HF Oscillator/Amplifier Class C | 7000 V | 33000 | — | 44 | 2200 mA |
Application Notes
HT should be applied no less than 30 seconds after filament voltage. Air cooling must be established before filament voltage application. Special connectors 21-181 (filament) and 22-280 (grid) are recommended.
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