A radio device comprising a housing having an opening and an internal retaining surface; an antenna support sleeve inserted in the opening and a rod antenna mounted for movement in the antenna support sleeve between extended and retracted positions; the sleeve including a resilient, outwardly-projecting finger which engages the retaining surface to prevent removal of the sleeve from the housing and the housing including an aperture through which the finger can be inwardly displaced using a tool, including a shank, to disengage the finger from the retaining surface, thereby enabling removal of the sleeve from the housing.