  We consider constraints on models in which a top quark mass is generated
through unenhanced extended technicolor interactions. The deviation in the
$\rho$ parameter from unity and $B$--$\overline{B}$ mixing could be large, but
given the uncertainties in strong dynamics and variations in the parameters of
models, no conclusive statement can be given. We conclude that the low
technicolor scale which is required to generate the top quark mass is not ruled
out.
