4009-B
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BrandStandard
ClassPower Triode
BaseWater Jacket MS.1362 / 223 LU.IA / PL.122.011/A
Construction
Primary TypeTriode
EnvelopeGlass and Metal (Water Cooled)
SectionsSingle
Filament / Heater
MaterialPure Tungsten
Absolute Maximum Ratings
Plate Voltage17500 V
Plate Dissipation20000 W
Cathode Current2500 mA
Audio Performance
Power Output33000 W
Key Features
- Water cooled anode
- Pure Tungsten filament
- Single ended
- Constant voltage type filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Static Constants | - | 6700 | 6000 | 40 | 1000mA |
| Class B A.F. Amp (Max Signal) | 15000V | - | - | - | 2000mA |
| Class B Telephony (Modulated Carrier) | 15000V | - | - | - | 1250mA |
| Class C Telephony | 10000V | - | - | - | 1250mA |
| Class C Telegraphy | 15000V | - | - | - | 2500mA |
Application Notes
The grid lead has been brought out through the side of the bulb compared to the 4009-A. Requires type ES.5706-I grid connectors.
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