Check the listing for details. Conar Signal Tracer Model 230. Condition: Used. Listed at 103.49 USD. The Conar Signal Tracer Model 230 is a vintage electronic device used for tracing and detecting signals in electronic systems. This model is known for its accuracy and reliability in identifying faults and issues within electrical circuits. With its compact design and easy-to-use functionality, the Conar Signal Tracer Model 230 is a valuable tool for troubleshooting and maintenance tasks in vintage electronics. It powers on after a bit of fiddling. Should have new cords if you would use it.