A radio device comprising a housing having an opening and a retaining surface, an antenna support sleeve inserted in the opening and a rod antenna mounted for sliding movement in the antenna support sleeve between extended and retracted positions, the antenna including a stop surface the sleeve including a first resilient, inwardly-directed member which abuts the stop surface when the antenna is in its fully extended position to block sliding removal of the antenna from the sleeve, the first member being outwardly displaceable using a tool to allow the stop surface to be slid past the first member and thereby enable sliding removal of the antenna from the sleeve and a second resilient member which engages the retaining surface to prevent removal of the sleeve from the housing.