The transformation occurs by replacing the charge motion vector with the opposite vector. This is explained by the fact that all elements of the electron's magnetoelectric system are opposite to all elements of the positron's magnetoelectric system. And this opposite is determined by the vector of their movement in space. Therefore, one has only to change - by means of a diode bridge, a mechanical rectifier or a brush generator of a direct current generator - the motion vector of one of the charges to the opposite vector, so that this charge immediately turns into its antipode.