WEEI (850 kHz) is a commercial sports gambling AM radio station licensed to Boston, Massachusetts, serving Greater Boston and much of New England. Owned by Audacy, Inc., WEEI is the Boston affiliate for the Audacy-owned BetQL Network and CBS Sports Radio, serving as a gambling-focused brand extension of its main sports radio station in the market, WEEI-FM. The WEEI studios are located in Boston's Brighton neighborhood, while the station transmitter resides in the Boston suburb of Needham. In addition to a standard analog transmission, WEEI is available online via Audacy. Historically, the station is perhaps best known by its former WHDH call letters, under which it operated from its establishment in 1929 until 1994; it then became the second home to WEEI following an intellectual property purchase. After WEEI's local programming was moved to 93.7 FM in 2011, the station became a full-time ESPN Radio affiliate in 2012, and a sports gambling-focused station in 2021. History WHDH (850 AM) Early years Originally located in Gloucester, Massachusetts, WHDH was founded on June 20, 1929, by Ralph Matheson. It was a daytime-only station broadcasting at 830kHz (leaving the air at local sunset in Denver, about two hours after sunset in Boston, to protect the signal of KOA in the Colorado capital city). WHDH was Matheson's second station; he had started WEPS on November 26, 1926. Much of WEPS' programming consisted of broadcasts to, for, or about fisherman, given Gloucester's status as a major port for the fishing industry. The WHDH license was issued in December 1928, a month after WEPS was forced to share time with WKBE in Webster on 1200kHz; WEPS was sold to Alfred Kleindienst, owner of its share-time partner (which became WORC in Auburn, near Worcester, a year earlier), in February 1930, with WEPS being moved to Auburn and consolidated with WORC on May 5. Matheson kept WHDH, which moved its studios to Boston on November 6, 1930, though some programming had originated from Boston for some time beforehand, and the transmitter remained in Gloucester until a 1932 move to Saugus. With the move, WHDH broadened its programming, but still included some reports for fishermen. In subsequent decades, WHDH would claim WEPS' history as its own. The 1941 North American Regional Broadcasting Agreement moved WHDH to 850kHz, and allowed the station to broadcast on a full-time basis. WHDH was able to increase power to 5,000 watts and go full-time,