 Westinghouse changed WDTV's call letters to KDKA-TV after the pioneering radio station of the same name, and switched its primary affiliation to CBS immediately after the sale.Westinghouse's acquisition of CBS in 1995 made KDKA-TV a CBS owned-and-operated station.DuMont produced more than 20,000 television episodes during the decade from 1946 to 1956.