3CX10,000A3/8159 is a high-performance ceramic/metal power triode designed for use in industrial heating, communications and broadcast FM applications. A modern mesh filament is used, replacing the old-fashioned hairpin construction. The improved mesh filament design ensures better mechanical rigidity and long lasting concentricity of the filament, providing enhanced linearity, less noise, reduced warm-up variation and longer life. The low-inductance, mesh-filament basket also forms a natural extension of the cylindrical stem geometry into the active area, giving superior VHF performance. The 3CX10,000A3/8159 is manufactured in Russia. It has achieved the improved performance described above with exact replacement compatibility with the 3CX10,000A3/8159 manufactured in the United States.