WISR was the brainchild of local businessman David Rosenblum, who felt that the community could use a local radio station to promote its community and events. Naming the station after his father, Isaac Samuel Rosenblum, David Rosenblum managed the station and sold airtime, with his wife Georgia keeping the books. The couple continued to operate the radio station until their deaths in the early 1950s. It was at that time that the Rosenblums' son Joel, assumed the operations of WISR. Joel Rosenblum's brother Ray later owned and managed a station of his own some 25 miles to the east, known as AM 1380 WACB (now WKFO) Kittanning.