Tube-number record
WL-8461
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BrandWestinghouse
ClassHard Tube Pulse Modulator
Construction
Primary TypeTriode
EnvelopeGlass/Metal
Base MaterialImmersion Cooled Anode
SectionsSingle
Filament / Heater
MaterialThoriated-Tungsten
Warm-up Time60s
Absolute Maximum Ratings
Plate Voltage80000 V
Plate Dissipation200000 W
Grid 1 Voltage-5000 V
Cathode Current750000 mA
Audio Performance
Key Features
- Immersion Cooled
- 3-Phase Filament
- Multiple-stand Thoriated-Tungsten Filament
- Hard-tube modulator or series regulator service
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pulse Modulator Service (1) | 55000 V | — | — | 25 | 600000 mA |
| Pulse Modulator Service (2) | 65000 V | — | — | 25 | 600000 mA |
| Pulse Modulator Service (3) | 75000 V | — | — | 25 |
Application Notes
The WL-8461 is a large, three-electrode, immersion cooled tube designed for service as a hard-tube modulator or series regulator. Fast-acting electronic protective devices (crowbar) are required for tube protection during fault conditions.
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