Svetlana 4CX800A
High Performance Tetrode

The Svetlana 4CX800A is a high-performance ceramic metal tetrode with a place dissipation rating of 800 watts with forced air cooling. The performance characteristics of the 4CX800A allow its use as a high gain grid-driven RF amplifier or in grounded grid service. A recommended mode of operation is in grid-driven service with a passive (resistive) 50 ohm untuned input circuit. This eliminates the need for multiple input tuned circuits and neutralization. In this mode, and exceptionally simple, stable, low-cost amplifier with good intermodulation performance can be designed.

As a linear power amplifier, the 4CX800A will conservatively produce 750 watts PEP SSB, and 750 watts Key Down CW in any of the three modes: grid-driven, grid-driven passive input, and cathode-driven. Because of the high performance characteristics of the 4CX800A, the tube will operate efficiently at low plate voltage. The Svetlana 4CX800A is manufactured in the Svetlana factory in St. Petersburg, Russia. The 4CX800A is widely used in Russia and other independent commonwealth states.