John Earl Rogers III, 52, an electrical engineer with the LitCom Division of Litton Industries here who was active in radio and communications clubs, died Tuesday at Doctor's Hospital of Prince George's County in Lanham following a heart attack. He lived in Hyattsville.

Mr. Rogers, who was born in Hartford, Conn., and grew up in Manchester, Conn., attended Bluffton College in Bluffton, Ohio. After Army service in Germany during the early 1950s, he returned to Bluffton and earned a bachelor's degree. He later studied electrical engineering Columbia University.

He worked for the Manson Laboratories in Stamford, Conn., until 1965, when he joined LitCom as a designer of communications equipment. He was transferred to Washington in 1975.

Mr. Rogers was a member of the American Radio Relay League and the Quarter Century Wireless Association Inc. He was a shortwave radio operator whose call letters were W1WKI.

Survivors include his wife, the former Heniretta Smith, to whom he was married for 20 years, of Hyattsville: one son, John E. IV, also of Hyatsville ; his parents, Mr. and Mrs. John E. Rogers Jr. of Wallingford, Conn,; two brothers, Alfred R., of Canton, Conn., and James O., of Bolton, Conn., and two sisters, Margaret D. Andrews of Hartford, and Enid O. Rogers of Manchester, Conn.

The family suggests that expressions of sympathy be in the form of contributions to the Heart Fund of the American Heart Association.