EE auto-power-spectra of detector-set, half-mission, and half-ring difference maps for 100, 143, and 217 GHz. C_ℓ rather than D_ℓ is plotted here to emphasize low multipoles. Results from the Planck 2015 data release are on the left; results from the pre-2016 maps described in this paper are on the right. Colour-coding is the same for all frequencies. We also show for reference an average of FFP8 simulations boosted by 20% to fit the half-ring null tests. The black curves show the F-EE model.