The relationship between radio luminosity L and magnetic field B is re-investigated under the assumption that the new spindown mechanism proposed by Huang et al. (1982) becomes dominant at large periods (P ∝ P2). Magnetic dipole braking is still assumed to provide the main torque at short periods (P ∝ P−1). Both spindown torques depend on B2 (assuming proportionality between internal and external fields) so that the resultant magnetic field in this hybrid model is given by (note the difference with the standard expression): A value of 3.6 is used for γ (Pineault 1986). For the radio luminosity we use the values tabulated by Manchester and Taylor (1981).