  Measurements of the trilinear gauge boson couplings WWgamma and WWZ are
presented using the data taken by DELPHI in 1998 at a centre-of-mass energy of
189 GeV and combined with DELPHI data at 183 GeV. Values are determined for
Delta(g_1^Z) and Delta(kappa_gamma), the differences of the WWZ charge coupling
and of the WWgamma dipole coupling from their Standard Model values, and for
lambda_gamma, the WWgamma quadrupole coupling. A measurement of the magnetic
dipole and electric quadrupole moment of the W is extracted from the results
for Delta(kappa_gamma) and lambda_gamma. The study uses data from the final
states jjlv, jjjj, lX, jjX and gammaX, where j represents a quark jet, l an
identified lepton and X missing four-momentum. The observations are consistent
with the predictions of the Standard Model.
