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BrandCSF (Compagnie générale de télégraphie Sans Fil)
ClassPower Double Triode
BaseOctal
Filament6.3V @ 4.75mA
Construction
Primary TypeDouble Triode
EnvelopeGlass
Base MaterialMetal sleeve
Sections2
Filament / Heater
Heater NotesIndirectly heated; Tolerance +/- 10%
Absolute Maximum Ratings
Plate Voltage400 V
Plate Dissipation30 W
Cathode Current300 mA
H-C Voltage300 V
Audio Performance
Key Features
- Low internal resistance
- High transconductance
- Reinforced internal structure
- Military and professional grade
- Mechanically robust
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 (per element) | 190V | 11000 | 250 | 2.7 | 185mA |
Application Notes
Specifically designed as a regulator tube in stabilized power supplies. For fixed bias operation, a resistor must be placed in each anode circuit to ensure a voltage drop of at least 20V.
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