Ben Strouse, 69, a retired broadcasting executive who was active in civic, professional and charitable activities here and in Baltimore, died Friday at Sinai Hospital in Baltimore after a heart attack.

A native and resident of Baltimore, Mr. Strouse worked in advertising and merchantising here and in Baltimore for 13 years before joining Washington radio station WWDC in 1942 as sales representative.

He was appointed general manager of the station in 1944 and was elected president of WWDC Inc., which operated WWDC-AM and WWDC-FM, in 1956. When Avco Broadcasting bought the stations in 1965, Mr. Strouse was named general manager and elected a vice president of the parent corporation. He retired in 1967.

During this time he founded his own broadcast equipment manufacturing firm, the old Broadcast Electronics of Silver Spring, and headed companies that acquired radio stations in Baltimore, Richmond, and Jacksonville, Fla.

Active in Washington charities, he was chairman of the old Community Chest and publicity chairman for the United Givers Fund. He also was a co-chairman of the United Negro College Fund.

His business and civic activities included terms as president of the Advertising Club of Washington, as director of the Metropolitan Washington Board of Trade and as a trustee of the Better Business Bureau here. He also was a member of the Washington Crime Commission.

Mr. Strouse attended Baltimore City College High School and Johns Hopkins University.

Survivors include his wife, Ruth, of the home in Baltimore; a son, Michael, also of Baltimore; a daughter, Patricia S. Cohen of York, Pa.; a sister, Jane Kahn of Baltimore, and four grandchildren.

The fmaily suggest that expressions of sympathy be in the form of contributions to a charity of one's choice. CAPTION: Picture, Ben Strouse