at this time.) In 1941, with the enactment of North American Regional Broadcasting Agreement (NARBA), the station switched to its present frequency of AM 1410. Power was boosted to the current 5,000 watts, and it moved its city of license to Hartford. It changed its call letters to WHTD to reflect its move to HarTforD, and became affiliated with the Mutual Broadcasting System. In 1956, as network programming moved from radio to television, WHTD switched to a middle of the road format. It changed its call sign to WPOP, signifying that it played POPular music. WPOP was a highly rated Top 40 radio station during the 1960s and early 1970s. The station achieved its highest level of success during this era, as it vied with rival 1360 WDRC for youthful listeners in the Hartford radio market. WPOP was acquired by entertainer and TV talk show host Merv Griffin in 1973, who also owned 104.1 WIOF (now WMRQ). In June 1975, WPOP dropped its hit music format, switching to All-News, carrying NBC's News and Information Service, with a sizable local news staff covering Connecticut news stories. When the NIS network ended two years later, WPOP continued the All-News format using its own anchors supplemented by CBS Radio News and the Associated Press radio service. By the late 1980s, talk shows were added and the station cut back on its news segments. Affiliation switched from CBS Radio to ABC Radio's Information Network. In 1994, Merv Griffin sold the station to SFX Broadcasting, Inc., which also owned FM 105.9 WHCN. On January 13, 1997, SFX Broadcasting switched WPOP's format to all-sports; most of its programming was provided by One-on-One Sports (now SB Nation Radio), but it also carried The Fabulous Sports Babe and weekend programming from the ESPN Radio Network, based in nearby Bristol, Connecticut. The station ended its One-on-One Sports affiliation on February 28, 1999, becoming a full-time ESPN Radio affiliate. In 2000, WPOP and WHCN were bought by Clear Channel Communications, the previous name of iHeartMedia, Inc. On January 27, 2012, WPOP's sports format began simulcasting on co-owned FM 97.9 WPKX, previously a country music outlet. The FM station eventually changed its call letters to WUCS, with the CS standing for Connecticut Sports. WPOP switched from ESPN Radio to Fox Sports Radio on March 5, 2012, with ESPN Radio remaining on WUCS. On August 17, 2015, WPOP changed its format from