70 GHz TT (top) and EE (bottom) error spectra, without noise. The blue line represents harmonic expansion of the binned map, corrected for a symmetric beam with FWHM = 13′. The fully converged deconvolution result (l_max = 1700, k_max = 6), is shown by a red line. We also show the error after 200 (purple dashed) and 500 (purple solid) iteration steps.