  We present new results from follow-up time-resolved spectroscopy of radial
velocity variable hot subdwarfs from the SPY project. Medium resolution spectra
were taken at the ESO NTT. Preliminary orbital solutions are presented for
three single-lined sdO/B binaries. The orbital periods of all binaries are
short and the companions are most likely white dwarfs or late main-sequence
stars. Follow-up time-resolved spectroscopy is necessary to measure the orbital
parameters with higher accuracy. Light curves should be taken in order to
search for reflection effects and or eclipses.
