Vigortronix pcb audio transformers vigortronix vtx 101 003 high quality pcb mounting audio transformer from vigortronix aimed at the professional audio market the vtx 101 003 offers good band width and low distortion characteristics these transformers are bidirectional so that an input winding can become the output winding and an output can become an input as a result it can provide a gain in signal level when used in one direction or a loss when used in reverse vigortronix vtx 101 003 p