DESIGN AND CONSTRUCTION OF A WIRELESS PUBLIC ADDRESS SYSTEM

Abstract

The project has demonstrated the benefits accruable from the advancement in communication technology. A wireless P A system was constructed as indicated in the design objectives. The transmitter propagates frequency modulation signal in the range 88-108MHZ. The receiver which uses a super heterodyne monolithic integrated circuits receives any frequency modulation that falls in the above range. The audio amplifier delivers a peak current of 4A and a power output of 44Watts. The maximum output is limited by the supply voltage of Vee = 22V and a maximum current 10 = 4A. This output parameters are obtainable when the supply voltage is kept at 220-240V which will require a minimum load of3-6!l across the amplifier's output.