Observed radial velocities of FF UMa plotted as a function of phase, with the velocity curves corresponding to the adopted orbital elements drawn through them. The radial velocities published by Galvez et al. (2007a) from their four successive observing runs are distinguished by squares, circles, triangles and stars, respectively. Filled symbols are used for the primary star and open ones for the secondary. Observations made near the conjunctions and measured as single-lined are plotted as open diamonds, the individual observing runs not being distinguished; they were not used in the solution of the orbit. The measurements made by Jeffries et al. (1995), which were weighted 1/4 in the solution, are plotted by plusses for the primary and crosses for the secondary. The three secondary velocities near phase 0.9, which have bad positive residuals, were all made on the same night (the first night), and the significance of their offset should probably not be over-estimated.