Charles E. (Carl) King, 49, the National Symphony Orchestra's stage manager since 1958, died Sunday at Glasgow Royal Infirmary in Glasgow, Scotland, where he was being treated for cancer.

Mr. King was a native of Washington and a 1949 graduate of Western High School.

After serving in the Army in Korea during the conflict there, he returned to Washington and began working in theater as a free-lance stage hand. He was named stage manager of the symphony orchestra in 1958.

Mr. King lived in Vienna. He was active in the Boys' Clubs of Greater Washington and the Big Brothers of the National Capital Area. In 1947, the Boys' Clubs named him "Outstanding Boy of the Year" for the Washington area.

He also was a member of Local 22 of the International Alliance of Theatrical Stage Employes.

Survivors include his wife, Ruby, of the home; two daughters, Nancy Webb, of Falls Church, and Janey, also of the home; three brothers, Richard S., of Washington, John T., of Providence, R.I., and Joel, of Arlington; and four sisters, Ann M. Sheridan, of Arlington, Mary K. Posey, of Vacaville, Calif., Blanche K. Dawson, of Alexandria, and Kathryn Wratchford, of Sterling, Va.