Amplification Factor of Triodes with Elliptic Grids Having Support Rods

ABSTRACT

A capacitance equivalence method to determine the amplification factor of triodes with irregular geometry was proposed by O'Neill. This method does not intrinsically take into its purview the presence of support rods of appreciable radius. In a previous communication, the author derived the equi-capacitance structure for elliptic grids using a method based on O'Neill's principle. In this paper the analysis given there at is supplemented with a criteria for obtaining an equivalent radius for the support rods, which would produce nearly the same screening fraction, if the position of these rods is reckoned at the circumference of the equivalent circular grid. The amplification factor formula is consequential.