  The energy doubling of the Frascati DAFNE Phi-factory can be accomplished
either by ramping the energy of the rings from the initial 510 MeV of the
injected beam or by upgrading the present Linac Energy to > 1.02 GeV so to
inject the beam at full energy. The choice between the two options is not the
goal of this paper, that instead, presents some technical solutions, allowing
to re-use all the components of the DAFNE electron-positron Linac.
