  We have measured a time delay of 26 (+4/-5) days and a magnification ratio of
1.52 +/- 0.05 in the strong radio gravitational lens PKS 1830-211. The
observations were made over the 18 month period from 1997 January to 1998 July
with the Australia Telescope Compact Array at 8.6 GHz, and have shown that the
source started a large flux density outburst around 1997 June.
