  The microcanonical transfer matrix is used to study the distribution of
Yang-Lee zeros of the $Q$-state Potts model in the complex magnetic-field
($x=e^{\beta h}$) plane for the first time. Finite size scaling suggests that
at (and below) the critical temperature the zeros lie close to, but not on, the
unit circle with the two exceptions of the critical point $x=1$ ($h=0$) itself
and the zeros in the limit T=0.
