Tube-number record
4009-B
0 archive entries
BrandStandard
ClassPower Triode
BaseSpecial / none
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 | 1000 mA |
| Class B A.F. Amp (Max Signal) | 15000 V | — | — | — | 2000 mA |
| Class B Telephony (Modulated Carrier) | 15000 V | — | — | — |
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.
0 results