The following lines were added (+) and removed (-):
This is a term for a crystal radio, which is a radio receiver which is powered only by the incoming signal. It uses a crystal detector and is considered the most simple radio receiver design. The term crystodyne has sometimes been used mistakenly as an alternative to the superheterodyne receiver. In reality, a crystodyne radio can use the superheterodyne receiver design.Russian inventor Oleg Losev used a zinc oxide crystal as a detector to produce the first crystal radios as both regenerative and superheterodyne receivers.