The two firms formed a joint venture known as WTOP Incorporated, with the Post holding 55 percent and CBS maintaining the balance (45 percent). The Post sold wholly owned WINX but retained its FM adjunct WINX-FM, which became the original WTOP-FM when the sales became final in 1949.
Two companies formed a joint venture called WTOP Incorporated, with The Post owning 55% and CBS owning the remaining 45%.  The Post sold its WINX station but kept its FM adjunct WINX-FM, which became the original WTOP-FM after the sale was finalized.