Telemax (TV network)

The history of television station XEWH precedes that of Telemax by over 30 years. Founded November 27, 1957 by the Azcárraga family, XEWH went on the air May 30, 1959 as part of Telesistema Mexicano, hence the callsign XEWH, from "XEW", the Telesistema Mexicano flagship station in Mexico City, and "H", for Hermosillo. As typical of Telesistema Mexicano stations, XEWH operated independently, but that changed in 1969. The station became a mere retransmitter of programs from Mexico City, likely from XEW-TV, and remained so until 1978, when it was acquired by local businessmen and broke away to resume producing local programming. In 1984, the station was sold to the Sonoran government. State government decree 369 on August 22, 1985, established XEWH as the official voice of the Sonoran government. Also in 1985, the government began building a network of low-power television stations throughout Sonora to rebroadcast XEWH.

XEWH is one of the few public television stations in Mexico to operate under a commercial concession. Its transmitter is located on Cerro La Cementera in Hermosillo along with those for Hermosillo's other television stations.

In March 2018, in order to facilitate the repacking of TV services out of the 600 MHz band (channels 38-51), XEWH was assigned channel 19 for continued digital operations.

The year 1990 saw the launch of Telemax, a new identity for the state-run television station. The initial construction of the statewide network was coming to a close, but as Telemax, the number of stations in the network increased rapidly. Seven stations were added in 1996, and 26 more were added in 1997, bringing the number of stations to 58.

In 2015, Telemax changed its format radically to offer half-hour newscasts at the top of the hour on weekdays, as well as educational programming on weekends. The network relaunch included a new logo and slogan, #TuVozSeEscucha (Your Voice is Heard), as well as an emphasis on social media interaction. On September 8, 2015, Telemax went HD and launched 17 HD transmitters.