

The effective radiated power (ERP) was boosted to 39,000 watts and the tower was increased to 550 feet in height above average terrain (HAAT). holding: a horse racing track in San Juan, Puerto Rico.) SJR changed the call sign to WYSP ("Your Station in Philadelphia"), and quickly made a deal with the Sunbury station that allowed WYSP to increase its power. (SJR stood for "San Juan Racing," referring to the company's lone U.S. Having been unsuccessful in getting the Sunbury station to agree to an FCC waiver, Storer sold WPNA, along with WCJW in Cleveland, Ohio, to SJR Communications for a combined $1.4 million. The station remained silent for two years. In 1969, WIBG-FM's call sign was changed to WPNA when Storer sold WIBG (AM) but kept the FM station. It was limited in range to avoid interfering with WKOK-FM in Sunbury, Pennsylvania, also on 94.1 MHz, 106 miles away (see Signal Note below). WIBG-FM was a restricted Class B station at the time. In 1968, owner Storer Broadcasting shut the station down while attempting to get Federal Communications Commission (FCC) permission for an increase in power. In the mid-1960s, WIBG-FM began to experiment at night with a prerecorded progressive rock format without announcers. However, it was hard to hear the FM station outside of Philadelphia and its close suburbs, because it was only powered at 10,000 watts on a 180 foot tower, well below the standard for other Philadelphia FM stations. It was the sister station of WIBG, and mostly simulcast the AM station, including the 1960s when WIBG was one of Philadelphia's leading Top 40 stations.

In 1948, the station signed on as WIBG-FM. The HD4 channel was known as "Eagles 24/7," with continuous programming about the football team. The HD3 channel carries a classic rock format that had been once heard on 94.1 when it was WYSP. Its HD2 subchannel is a simulcast of co-owned 1060 KYW's all-news format. The station has local hosts days and evenings, with programming from CBS Sports Radio heard overnight. WIP-FM is the flagship station for the Philadelphia Eagles Football Network and the MLB Philadelphia Phillies Radio Network. The WIP-FM offices and studios are co-located within Audacy's corporate headquarters in Center City, Philadelphia, and the broadcast tower used by the station is located in the Roxborough section of Philadelphia at ( 40☀2′30.1″N 75☁4′10.1″W / 40.041694°N 75.236139°W / 40.041694 -75.236139). WIP-FM (94.1 MHz) is a commercial radio station licensed to serve Philadelphia, Pennsylvania.
