Tube-number record
LINEAR BEAM POWER TUBE
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BrandRCA
ClassPower Tube
BaseSpecial / none
Construction
Primary TypeBeam tetrode / beam power
EnvelopeCeramic-Metal (CERMOLOX)
Base MaterialMetal
Sections1
Filament / Heater
MaterialThoriated-Tungsten Mesh
Warm-up Time15s
Absolute Maximum Ratings
Plate Voltage8000 V
Plate Dissipation5000 W
Grid 2 Voltage1650 V
Grid 1 Voltage-450 V
Cathode Current5000 mA
Audio Performance
Key Features
- CERMOLOX construction
- Thoriated-tungsten mesh filament
- Forced-air cooling
- Linear beam power design
- Integral radiator
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Telegraphy (Grid-drive, 108 MHz) | 6500 V | — | — | 20 | 2350 mA |
| Class C Telegraphy (Cathode-drive, 216 MHz) | 6300 V | — | — | 20 | 1310 mA |
| Class B Television (Cathode-drive, 216 MHz) | 5030 V | — | — | 20 |
Application Notes
Requires forced-air cooling. Minimum cooling flow of 105 cfm through radiator for 5000W dissipation. Air flow past terminals (40 cfm) required to maintain temperature below 250°C.
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