in a converter console for converting a portable radio to mobile operation , a sleeve for receiving the portable radio and improved mounting apparatus which positions the sleeve so the portable can be easily inserted and smoothly moves the sleeve into a loaded position in which the portable is connected for control by the console and for receiving power from the vehicle . the mounting apparatus holds the various contacts firmly together to prevent contact chatter . also included are locking apparatus which prevent relative movement between the portable / sleeve and the housing to eliminate contact chatter under extreme vibration and reduce theft and improper use .