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3CX400A7/8874

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BrandSvetlana
ClassHigh-Mu Power Triode
BaseE.F. Johnson #124-311-100
Filament6.3V @ 3mA

Construction

Primary TypeTriode
EnvelopeCeramic/Metal
SectionsSingle

Filament / Heater

Heater NotesOxide-coated unipotential cathode

Absolute Maximum Ratings

Plate Voltage2200 V
Plate Dissipation400 W
Cathode Current350 mA

Audio Performance

Key Features
  • High performance ceramic/metal construction
  • Forced air cooling
  • High-Mu Triode
  • Pulse modulator capable

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class AB2 Cathode Driven (30 MHz)2000V29000--312mA
Class AB2 Cathode Driven (150 MHz)2000V29000--245mA
Class AB2 Cathode Driven (432 MHz)2000V29000--300mA

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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