The station was assigned the WTSA call letters by the Federal Communications Commission on August 1, 1986. WTSA-AM 1450 was signed on April 19, 1950 by WKBR Radio of Manchester NH. "TSA" was Tri-State-Area. The station was first in Brattleboro and was positioned to serve VT, NH, MA. WTSA was sold to the Puritan Radio Group, and later to McGavern/Guild. McGavern changed the middle of the road format to top 40 in the mid 60's. WTSA was always the most popular station in the region, being a strongly personality directed format. In 1967 WTSA had a staggering Hooper Index listenership of 49.7 market share out of a 13 station measure. WTSA-FM came much later in 1975, and with ownership changes, the format on AM was moved to FM.