Despite the already established super heterodyne, receivers of other types were still assembled by amateurs. Thus, Radio Craft of March 1846 published this design of a 3-tube medium-wave reflex receiver to be connected to the power grid.

Despite the already established super heterodyne, receivers of other types were still assembled by amateurs. Thus, Radio Craft of March 1846 published this design of a 3-tube medium-wave reflex receiver to be connected to the power grid.