  In this contribution we present a simple and effective procedure to determine
the average critical current of a tridimensional disordered Josephson junction
array (3D-DJJA). Using a contactless configuration we evaluate the average
critical current and the typical width of the distribution through the analysis
of the isothermal susceptibility response to the excitation field amplitude,
chiAC(h). A 3D-DJJA fabricated from granular Nb is used to illustrate the
method.
