Central region of NRAO 530. Contours represent total intensity at 227 GHz. Model components at 227 GHz are named according to Jorstad et al. (2023), at other frequencies – according to Table C.1. The size of Gaussian components is reduced by a factor of five with respect to Fig. 1 for visual clarity. Dashed circles show the location of the apparent VLBI core at different frequencies according to the labels. Component C2 spatially coincides with the apparent core of the 43 GHz model Q0 and an 86 GHz component W1. A weak component, C0b, spatially coincides with the true jet origin calculated using core shift.