TVs couldn't receive UHF broadcasts, so an UHF decoder was needed. As TVE's strategy evolved into turning the first channel into a generalist channel, niche programming was moved to UHF. Under the Salvador Pons administration, the second channel received artists from the country's Official Film School (), such as Claudio Guerin, Pedro Olea or Antonio Mercero, people who would use the channel as a test zone to air alternative programming, such as documentaries or fiction shows. There was a high share of cultural programmes, like classical music blocks or theatre slots. 1970s During the 70s, the channel's programming was restricted to air at night (from 20:00 to 00:00), with an extension in the weekends. Coverage reached the main cities of Spain, but although TVE pointed out that only "three years" would pass before UHF could be tuned in all Spain, the second channel could not get it until 1982. For this reason it was not strange that successful programs in the UHF passed to the first channel. The UHF station continued to develop a minority programming, with a strong cultural emphasis, which did not compete directly with TVE-1. In addition to documentaries, theater broadcasts and dramas, the second channel also was at time broadcasting sports events and educational programming. At that time, the second channel was colloquially dubbed "el canalillo." During the Spanish transition, the programming of the second channel received a small boost. In January 1976 debuted the program of debate La Clave (1976-1985), which addressed current issues from different points of view, something very complicated during the Francoism, preceded by a film related to the subject. Another important program was A fondo (In depth) (1976-1981), a talk show presented by Joaquín Soler Serrano which discussed with personalities from the artistic, literary and scientific fields of the time. On the other hand, the new artistic and musical trends were reflected in Encuentros con las artes y las letras (Encounters with the arts and the lyrics) (1976-1981) and Popgrama (1979-1981). Another important aspect was the consolidation of the station's regional broadcasting centres, most importantly in Catalonia and the Canary Islands. TVE Cataluña started producing and broadcasting regional programming in opt-outs through the Circuit Català (Catalan circuit), while continuing to produce content for nationwide broadcasts. In the eve of the 1982 World Cup held in Spain, the Canary Islands regional broadcasting centre erected a new production office that, in addition to