EL PASO, Texas (AP) _ Broadcast pioneer Karl O. Wyler, who began singing on radio as a teen-ager and went on to own radio and television stations in El Paso, has died at age 84.

He died Thursday night, apparently from a heart attack, officials said.

Wyler first became involved in broadcasting in 1921, when he conducted his four-piece orchestra, The Merrymakers, over ham radio airwaves.

He went on to own radio and television stations KTSM.

In 1977 he was named Pioneer Broadcaster of the Year by the Texas Association of Broadcasters.

''I looked up to him for years and years. He was one of the great men in broadcasting,'' said Richard Pearson, general manager of rival television station KVIA. ''This man built an empire of AM, FM and television when nobody else believed in it. I had the greatest respect for him.''

Besides his broadcast business, Wyler was long active in El Paso civic affairs.

About 300 guests turned out April 5, his 84th birthday, when he was honored by the El Paso Community Foundation for his contributions to the city's children and the needy.

Survivors include his wife, Glyn; and his son, Karl O. Wyler II.