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.

Abstract: A control for navigation receivers, radio compasses, radio, and aircraft telephony, transponders, and the like, comprising at least one control plate means arranged in series and spaced apart from each other behind a front plate, and sprocket wheel means having associated stop wheels for controlling frequencies and other suitable operational functions, respectively, connected with each other by coupling members and rotary knobs. Yieldable control contacts are mounted on the sprocket wheels which cooperate with rest controls mounted on a printed circuit and are operatively connected with the control plate means.