An Empirical Equation for Determining the d2ig/deg2of Detectors

An empirical equation for the grid-current grid-voltage curve of the C-327 tube is developed. By obtaining the derivatives of this equation rather than determining them from the i
g
-e
g
, curve by graphical means the inaccuracy of the graphical methods is avoided. The equation holds accurately in the range of e
G
encountered in practice.