Tube-number record
8984
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BrandRCA
ClassVHF Linear Beam Power Tube
Construction
Primary TypeBeam tetrode / beam power
EnvelopeCeramic-Metal
Base MaterialCoaxial Terminals
SectionsSingle
Filament / Heater
MaterialThoriated-Tungsten Mesh
Warm-up Time120s
Absolute Maximum Ratings
Plate Voltage15000 V
Plate Dissipation40000 W
Grid 2 Voltage2000 V
Grid 1 Voltage-600 V
Cathode Current12000 mA
Audio Performance
Power Output55000 W
Key Features
- CERMOLOX construction
- Thoriated-tungsten mesh filament
- Coaxial terminals
- High gain-bandwidth products
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B Television Service (Synchronizing Level) | 10500 V | — | — | 15 | 8400 mA |
| Class AB FM Telephony (Grid Drive) | 10800 V | — | — | — | 6500 mA |
Application Notes
Designed for high-gain, high-linearity equipments for VHF-TV and FM service. Well suited for SSB, CW, or pulsed RF modulator service.
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