Frequencies resulting from kinematic calculations in which the amplitude of the mean flow was changed by multiplication with a scale factor, f. Stars denote frequencies stemming from an eigenvalue calculation according to (6), whereas triangles are estimates obtained from kinematic results from (8). The dashed-dotted line gives frequencies as predicted for an αω-dynamo by (18), while the dashed line represents ω as a function of for an α²ω-dynamo according to (17).