The former pipe major of the John F. Nicoll Pipe Band, he became ill after participating in a parade in Aberdeen on Dec. 3.
Born in Fort Benning, Ga., he studied music as a child and was a 1966 graduate of Pikesville Senior High School. He attended the University of Maryland, College Park.
He joined the Army and was assigned to the band at Fort Belvoir, Va. A saxophonist, he played at military funerals at Arlington National Cemetery and at the inauguration of President Richard M. Nixon.
In the 1970s, he worked at Tulkoff's Food Products and later at a contracting business. He then became a financial collector for the University of Maryland Surgical Associates.
Mr. Ptaschek was a past commander of Towson American Legion Post 22 and was twice master of his Masonic lodge.
Funeral services will be held at 10 a.m. Tuesday at St. Stephen's Episcopal Church, 11856 Mays Chapel Road in Timonium.
Survivors include his wife of 30 years, the former Trish O'Neill, a Mercy Medical Center employee; and his mother, Marilyn Reter of Pensacola, Fla.