Abstract: A housing including heatsink and cam surfaces formed as a single unit and a chassis formed integrally with screw-less circuit board mounting apparatus and designed to fit within the housing so that power transistors mounted on a circuit board are urged into heat conducting contact with the heatsink by the cam surfaces when circuit boards are assembled on the chassis and the chassis is assembled in the housing.

Abstract: 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.