ACKERKNECHT, DAVID B., 25, of St. Petersburg Beach, died Friday (Oct. 4,, 1991) at Palms of Pasadena Hospital. He came here in 1982 from his native Allentown, Pa. He was general manager for Old World Cheese Shop Restaurant in South Pasadena for five years. Survivors include his mother, Constance Rhoda, Gulfport, and his father, Leo R., Bethlehem, Pa.; a sister, Beverly, Gulfport; a stepbrother, David S. Rhoda, Bethlehem; grandparents, Donald Smith, Allentown, and Cora McLain, Belvedere, N.J.; and several nieces and nephews. National Cremation Society, St. Petersburg. + + +