  In this paper, we construct new sequences of asymptotically good
convolutional codes. These sequences are obtained from sequences of transitive,
self-orthogonal and self-dual block codes that attain the Tsfasman-Vladut-Zink
bound. Furthermore, by applying the techniques of expanding, extending,
puncturing, direct sum, the |u|u+v| construction and the product code
construction to these block codes, we construct more new sequences of
asymptotically good convolutional codes. Additionally, we show that the
proposed construction method presented here also works when applied for all
sequences of good block codes where lim kj/nj and lim dj/nj exist.
