Intercomparison of the relative calibration of the LFI radiometers, as measured on the CMB acoustic peak by averaging the power spectrum from 100 <ℓ < 250. Note that we display both main arm (slightly to the left of each dotted, vertical line) and side arm (to the right) radiometers for each horn, as they are all calibrated independently. We also include the full frequency maps, labelled as f30, f44, and f70. LFI 70 GHz full frequency at 70% sky coverage is taken as reference.