This article describes a few high-altitude balloon experiments realized by a heterogeneous group of students, radio amateurs, professors and others. The emphasis of these experiments were to stimulate the interest in ham radio in general, and its investigate aspects in particular. Three flights were launched, from which lots of useful information was gathered, and many people, in a radius of more than 600 km helped out in the events.Fil: Coppens, John. Universidad Católica de Córdoba. Facultad de Ingeniería; Argentina