LAS VEGAS (WiMAX Day). A public television broadcaster in Las Vegas has decided to auction 72 Mhz of spectrum it owns. The broadcaster acquired the spectrum in the 1960s, and was set aside for educational purposes. The spectrum, which was once used for closed-circuit education, just so happens to sit between spectrum owned by NextWave and Clearwire on one side and Sprint Nextel on the other. The spectrum covers Southern Nevada and parts of Southern California. It is being put on the block because the Federal Communications Commission has mandated that educational content providers make 95 percent of their spectrum available for commercial use by early 2008 or risk losing it. The spectrum band in this area is divided in such a way that it imposes difficulties for any operator to operate as the educational spectrum places a hole in the middle of the other bands, making roaming impossible.