SI-TEX 307/50/200T-CX Thru-Hull Transducer f/SVS-650, CVS-126 and CVS-128. Availability : In stock. Product type : Fish Finders & Depth Finders. The SI-TEX CVS-126 Dual-Frequency (50/200kHz) Echo Sounder features a digital signal processor (DSP) for a clearer image that enhances fish targets in shallow "This is a unique, unprecedented opportunity for the city to gain population and its tax base," says Cincinnati Mayor Charlie Luken.