KTNC Channel 42 may soon be up for sale along with 26 other TV stations owned by Pappas Telecasting of Visalia. Chairman and chief executive Harry Pappas says that after 40 years in broadcasting, “the time has come to simplify my life and spend more time with my family.” He’s hired Moelis & Company to explore options for selling the privately held company that includes network affiliates in several smaller markets. One of the Pappas assets that apparently is not on the block is San Francisco’s KTRB-AM 860, a 50,000-watt station that hit the air in February.