  We quantize the deformed modes of a single supertube solution with regular
profile of circular cross section on the unstable non-BPS D3-branes by using
the Minahan-Zwiebach tachyon action. The result is used to count the
microstates in an ensemble of supertube with fixed macroscopic quantities of
charges $Q_{D0}$, $Q_{F1}$ and angular momentum $J$. We show that the entropy
of the system is proportional to $\sqrt{Q_{D0}Q_{F1} - J}$, which is consistent
with that calculated by the DBI action. Therefore, besides the well known
properties that the kink solution (and its fluctuation) of tachyon DBI action
corresponds with the brane solution (and its fluctuation) of DBI action, our
result establishes a property that the entropy of the tachyon supertube in
tachyonic DBI action corresponds with that of the supertube in DBI action.
