Tube-number record
4628
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BrandRCA
ClassBeam Power Tube
BaseCoaxial
Construction
Primary TypeBeam tetrode / beam power
EnvelopeCeramic-Metal
Base MaterialMetal/Ceramic
SectionsSingle
Filament / Heater
MaterialThoriated-Tungsten Mesh
Warm-up Time15s
Absolute Maximum Ratings
Plate Voltage7500 V
Plate Dissipation10000 W
Grid 2 Voltage1650 V
Grid 1 Voltage-750 V
Cathode Current4000 mA
Audio Performance
Key Features
- CERMOLOX®
- Integral Louvered-Fin Radiator
- Forced-Air Cooled
- Thoriated-Tungsten Mesh Filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| SSB Suppressed Carrier Class AB1 CCS | 7000 V | — | 1200 | — | 500 mA |
| AM Telephony Class AB2 CCS (Cathode Drive) | 6500 V | — | — | — | 1100 mA |
Application Notes
Designed for Single-Sideband Service in stationary and portable equipment. Rated as a linear RF power amplifier in Class AB1 service. Also useful for AF amplifier/modulator and RF power amplifier/oscillator in Class C.
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