Abstract: A wireless set such as a radio telephone, transmitter, aircraft wireless navigation or indication set having at least one circuit plate bar arranged in a frame so that the plate bar will contain circuit elements of a printed circuit. Along one edge of a circuit bar is contained a row of guide pins for connection with other housing parts. These pins are plugged into a corresponding row of adapter sockets in a cable plate or into a multi-polar socket so that the row of guide pins of each circuit plate or the row of sockets in the cable plate are arranged so that the plate bar may be pulled out of the frame in its operating position and plugged into a freely accessible testing position on the cable plate or the multi-pole socket.