The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  X  0  0  0  0  X 2X 2X  0  0  X  X  X  X  X  X  X  0 2X  0 2X  0 2X  0  X 2X  X 2X 2X  0  0 2X  X  0  X 2X 2X  0 2X  X  X  0  0  0  X  X  X  0  0 2X 2X  X  X 2X 2X  0 2X  0  X  X  0  X 2X  X  0 2X  0  X  0  X 2X  0  X 2X 2X
 0  0  X  0  0  X 2X  0 2X  0  X  X 2X 2X  0  X  0  X  X  X  X  0  0 2X 2X  X  X 2X  0 2X  0  X  X  0 2X 2X 2X  0 2X  X  X  0 2X 2X 2X  X 2X  0 2X 2X  X 2X 2X  X  0  X  0 2X  X  0  X 2X  X  X 2X  X 2X  0  0  0 2X  X  X  0  0  0
 0  0  0  X  0 2X 2X  X  0  X  X  0  0  X 2X  X  X 2X 2X  0  0 2X 2X 2X 2X 2X  X  X  0  X 2X  X 2X 2X  X 2X  X  0  0  0  X  0  0 2X  0  0  0  X  X  X 2X 2X 2X  0  X 2X  0 2X 2X  X 2X 2X  X  X  0  X  0 2X 2X  X  X  X  0  0  X  0
 0  0  0  0  X 2X 2X 2X 2X 2X  0 2X  0  0 2X 2X  0  X  0  0 2X 2X  X 2X  X 2X  0 2X  0  0 2X 2X  X  0  0  0 2X 2X  0  X  X  X  X  0 2X  0  X 2X 2X  X  0  0  X  X  0 2X 2X  X  X  X  0 2X  0 2X 2X  X  X  0  X  X  X  X  X 2X  X  X

generates a code of length 76 over Z3[X]/(X^2) who´s minimum homogenous weight is 147.

Homogenous weight enumerator: w(x)=1x^0+22x^147+96x^150+486x^152+78x^153+30x^156+12x^159+2x^162+2x^228

The gray image is a linear code over GF(3) with n=228, k=6 and d=147.
This code was found by Heurico 1.16 in 0.0906 seconds.