Radio demonstration device for use in sound studios - has individual receivers under test connected to reproduction unit through relay and connecting wires

摘要

The test and demonstration device serves for comparative demonstration of different but similar electroacoustical equipment such as broadcast receivers. It is esp. used for car radios. A number of wires are used which connect the receivers with one or several reproduction units. In order to separate signals originating from one of the receivers from those of another to be demonstrated next, a relay or an electronic switch (13) is inserted before the wires leading to the reproduction unit or loudspeakers (32). The switch has a large number of contacts to connect the different radios.