This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be assembled easily, since all the components are common. This circuit can be used with cassette tape mechanisms to recover its signals to other media, for example, recording on CD. The circuit can be powered by two 9 V batteries or a source with up to 15 + 15V low current, as it has low consumption. The operational is the 741.
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