Tube-number record
6949
0 archive entries
6949 is a tube type in the TubeDatabase archive (class: Super-Power Shielded-Grid Beam Triode). Recorded specifications: brand RCA, year 1958, construction Beam tetrode / beam power, base Metal, socket Coaxial, maximum plate voltage 20000 V, and maximum plate dissipation 400000 W. The archive does not yet hold a photographed example of this type.
BrandRCA
ClassSuper-Power Shielded-Grid Beam Triode
BaseCoaxial
Construction
Primary TypeBeam tetrode / beam power
EnvelopeCeramic-Metal
Base MaterialMetal
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Warm-up Time60s
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| CCS Class B SSB Linear Amplifier | 18000 V | — | — | 60 | 57000 mA |
| CCS Class C Telegraphy/FM | 17500 V | — | — | 60 | 40000 mA |
Application Notes
The 6949 requires a high-speed electronic protective device to remove plate voltage within microseconds in case of internal arcing. Requires distilled water for cooling.
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