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Russian inventor Oleg Losev is credited for the crystal radio and used a zinc oxide crystal as a detector to produce the first crystal radios as both regenerative and superheterodyne receivers.Russian inventor Oleg Losev is credited for the crystal radio and used a zinc oxide crystal as a detector to produce the first crystal radios as both regenerative and superheterodyne receivers. In the most simple form, the crystodyne receiver does not use a superheterodyne circuit. The fewer the components the more efficient the crystal radio can operate. With so little power to work with, the elimination of components can be necessary to produce audio loud enough for the human ear to detect. [[File:crystalradiosimple01.png]]<BR>''Simple crystal radio design.''