Tube-number record
3CX400A7/8874
0 archive entries
3CX400A7/8874 is a tube type in the TubeDatabase archive (class: High-Mu Power Triode). Recorded specifications: brand Svetlana, year 1997, construction Triode, socket Special / none, maximum plate voltage 2200 V, and maximum plate dissipation 400 W. The archive does not yet hold a photographed example of this type.
BrandSvetlana
ClassHigh-Mu Power Triode
BaseSpecial / none
Filament6.3 V @ 3 mA
Construction
Primary TypeTriode
EnvelopeCeramic/Metal
SectionsSingle
Filament / Heater
Heater NotesOxide-coated unipotential cathode
Absolute Maximum Ratings
Plate Voltage2200 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class AB2 Cathode Driven (30 MHz) | 2000 V | 29000 | — | — | 312 mA |
| Class AB2 Cathode Driven (150 MHz) | 2000 V | 29000 | — | — | 245 mA |
| Class AB2 Cathode Driven (432 MHz) | 2000 V | 29000 | — | — |
Application Notes
Principal use is as an RF amplifier in Class A, B, or C service. Can be operated as a pulse modulator with plate voltage up to 3500V.
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