The charge and magnetic form factors F ch , F mag of 3H and 3He are computed for the HJ potential, neglecting mesonic corrections. The results show a well defined diffraction minimum at q 2 = 12.6 fm −2, and agree quite well with the recent experiments of McCarthy et al. However, inclusion of a three-body potential to fit the energy to −8.4 MeV moves the minimum out to 14 fm −2, in worse agreement with experiment.