Tube-number record
WL-7215
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BrandWestinghouse
ClassPower Amplifier Triode
Construction
Primary TypeTriode
EnvelopeGlass/Metal with integral water jacket
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage9200 V
Plate Dissipation9000 W
Grid 1 Voltage1500 V
Cathode Current2000 mA
Audio Performance
Key Features
- High perveance structure
- Integral water jacket with internal spiral water diverter
- Turbulence cooling prevents anode hot spots
- Spring loaded thoriated tungsten filament
- High efficiency filament design (50A peak at 350W)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Power Amplifier Class C Telegraphy (5kV) | 5000 V | — | — | 22 | 1610 mA |
| RF Power Amplifier Class C Telegraphy (9kV) | 9000 V | — | — | 22 | 2000 mA |
Application Notes
Specifically designed for operation with lower voltage power supplies and industrial heating applications (induction and dielectric). Ratings apply up to 30 megacycles.
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