II, as well as staff entering the military, caused the station to cease operations until after the war. Operations were reactivated in May 1946, under the guidance of Dan Harris, operating on 560 kHz from 4-10 p.m. A 1948 review stated that transmitters were operating on both 560 and 640 kHz, with advertisers that included local grocery, drug, and stationary stores as well as restaurants. The station now identified itself as "WHUS", although because it did not need a license these call letters were not formally assigned by the FCC. The studios were moved from the basement of Koons Hall to the new Student Union Building in 1952. Between 1954 and 1956, there was another hiatus in broadcasting owing to technical difficulties in complying with FCC restrictions on signal strength. Eventually low power AM broadcasting was resumed at 670 kHz. AM programming was predominant through the late 1960s, although during periods when the AM and FM stations were carrying the same program, provisions had to be made to avoid airing commercials on the FM side, which was only licensed for non-commercial operation. In 1963 twenty-four-hour-a-day broadcasting was started on WHUS (AM) with the use of automatic reverse tape reels that provided 6 hours of programming. However, by the mid-1970s the closed-carrier AM broadcasting system had fallen into disrepair and was discontinued. FM station In 1957 the university received a license for a 10-watt non-commercial FM station operating on 90.5 MHz, which was now formally issued the WHUS call letters by the FCC. This new authorization meant that station coverage was no longer limited to just the campus. WHUS moved to 91.7 MHz in 1966, increased power to 1,250 watts in 1968, then to 3,200 watts in 1974. In the mid-1970s student managers decided to operate the station 24 hours a day year round, adding non-student volunteers to staff and produce programs. WHUS became a "community" station. Beginning about 1975, a major refurbishment of the studios upgraded the mostly mono vintage equipment so that in 1977 FM-stereo broadcasting could begin. In 1997, WHUS built a new tower that allowed its signal to reach a radius. This expansion into the Hartford area helped grow its audience. During the summer of 1998, WHUS began webcasting its air signal over the Internet. The station moved to an old farmhouse on the North Campus in 2002 for the remodeling of the Student Union. In 2006