Adam Young, a broadcast pioneer who started as a page with NBC radio before co-founding one of the nation’s 25 largest television station groups, died Nov. 15 in Palm Beach, Fla. after suffering a stroke. He was 91.Young launched his business representing radio stations in the United States and Canada. He eventually did the same for television stations before co-founding Young Broadcasting Inc. with his son Vincent in 1986. The company now owns and operates 10 television stations across the United States, including the nation’s largest independent station, KRON-TV in San Francisco. Young served as treasurer of the company until his death. Young joined NBC as a page at age 17 and worked the grand opening of Radio City Music Hall.