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We demonstrate a photonic RF integrator based on an integrated soliton crystal micro-comb source. By multicasting and progressively delaying the input RF signal using a transversal structure, the input RF signal is integrated discretely. Up to 81 wavelengths are provided by the microcomb source, which enable a large time-bandwidth product of 81. Our approach also features a high degree of reconfigurability, by simply adjusting the value of dispersion (i.e., the length of dispersive fibre), thedoi:10.31219/osf.io/twdup fatcat:467hd35bqrfgvkrbijbgwehzuu