The results of the Models for Different Radio Usage workshop held on 17 December 2005 were brought together through a site specific collective action in the streets of Novi Sad on the following day. Although the action was intended to be an ad-hoc and flexible means of artistic intervention in the public sphere, the action encountered a few obstacles that were'nt anticipated beforehand, the intentions that the artists from Hamburg had when to put up their artististic site specific radio intervention in public Novi Sad space revealed some interesting and problematic 'differences' between the conditions of public space and radio in Novi Sad/Serbia in contrast with Hamburg/Germany.