  We present our current work on the spectral analysis of the hot sdO star
Feige 34. We combine high S/N optical spectra and fully-blanketed non-LTE model
atmospheres to derive its fundamental parameters (Teff, log g) and helium
abundance. Our best fits indicate Teff =63 000 K, log g=6.0 and log
N(He)/N(H)=-1.8. We also use available ultraviolet spectra (IUE and FUSE) to
measure metal abundances. We find the star to be enriched in iron and nickel by
a factor of ten with respect to the solar values, while lighter elements have
subsolar abundances. The FUSE spectrum suggests that the spectral lines could
be broadened by rotation.
