  The interplay between the Kondo effect and disorder is studied. This is done
by applying a matrix coherent potential approximation (CPA) and treating the
Kondo interaction on a mean-field level. The resulting equations are shown to
agree with those derived by the dynamical mean-field method (DMFT). By applying
the formalism to a Bethe tree structure with infinite coordination the effect
of diagonal and off-diagonal disorder are studied. Special attention is paid to
the behavior of the Kondo- and the Fermi liquid temperature as function of
disorder and concentration of the Kondo ions. The non monotonous dependence of
these quantities is discussed.
