KXAN operates with 700,000 watts ERP. It was 5,000,000 watts ERP when it was analog.
KBVO's 75 watt ERP is due to antenna gain. The transmitter output (TPO) is 5 watts. Furthermore KBVO is directional, thus the 75 watts is what's produced in the main lobe. On the backsides of the pattern, the ERP is a staggering 27 watts.