A SAW device D1 according to the present invention comprises a ladder-type SAW device T1 for transmission and a ladder-type SAW device R2 for receiving on a main surface of a piezoelectric substrate. The combined frame comprises a lower frame and an upper frame. Therefore, thermal stress generated in the tube can be diffused from the joining portion of the tube to the core plate. At a predetermined height of the capillary, the wire clamp is closed to clamp onto the wire, and thereafter, the capillary and wire clamp may be moved further away from the wedge wire bond to cause the wire to break away from the wedge wire bond and to form the wire tail with a desired length extending from the capillary. The method involves the step of monitoring the parameters and evaluating the parameters to detect a brake failure of the brake.