Tube-number record
6448
0 archive entries
6448 is a tube type in the TubeDatabase archive (class: UHF Beam Power Tube). Recorded specifications: brand RCA, year 1954, construction Beam tetrode / beam power, base Water-cooled blocks, socket Coaxial, maximum plate voltage 7000 V, and maximum plate dissipation 26000 W. The archive does not yet hold a photographed example of this type.
BrandRCA
ClassUHF Beam Power Tube
BaseCoaxial
Construction
Primary TypeBeam tetrode / beam power
EnvelopeCeramic-Metal
Base MaterialWater-cooled blocks
SectionsSingle section with dual-strand filament
Filament / Heater
MaterialThoriated Tungsten
Warm-up Time10s
Absolute Maximum Ratings
Plate Voltage7000 V
Plate Dissipation26000 W
Grid 2 Voltage1000 V
Grid 1 Voltage-300 V
Cathode Current7000 mA
Audio Performance
Key Features
- Water-cooled electrodes
- UHF operation up to 1000 Mc
- Thoriated tungsten filament
- Internal bypass capacitors
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Power Amplifier Class B Television Service (500 Mc) | 6000 V | — | — | 6 | 6900 mA |
| RF Power Amplifier Class B Television Service (900 Mc) | 6500 V | — | — | 6 | 6800 mA |
| RF Power Amplifier Class C Telegraphy (900 Mc) | 6500 V | — | — |
Application Notes
Forced-air cooling of ceramic bushings required if temperature exceeds 150°C. Water flow must start before application of voltage.
0 results