Sophisticated electronic Receiver with high input resistance is able to detect low audio AC voltage gradients (ACVG) and provide easy method of finding any coat defect or short location in a pipeline or cable. Audio powerful Transmitter is connected to the pipeline or cable. The operators are able to select the output to send maximum energy to the pipeline or buried cable by using panel meter. The Receiver is equipped with two visual and audio indicators that show the direction of the escaping current from the defects.