The First Radio Transmitting Set

      This transmitter was first used in India in 1924 by the Madras Presidency Radio Club with Mr. H.E. Viscount Goschen, the then Governor of Madras as its patron. In October 1927 after the Club stopped functioning, this transmitter was presented to the Corporation of Madras who started a regular broadcasting service from 1^st April 1930. The service, maintained by this transmitter up to 15^th June 1938. It not only benefitted the public of Madras but also places outlying Madras such as Chittoor, Viziyanagaram etc., and Sri Lanka. This transmitter had to be put out of commission due to the establishment of the Madras Station of the All India Radio on 16^th June 1938. The Council of the Corporation of Madras at its meeting held on 4^th July 1939 sanctioned the presentation of this transmitter to the Government Museum to perpetuate the memory of the pioneer radio broadcasting activity in India.

Strowger Telephone Exchange

     Strowger Telephone Exchange unit is displayed to illustrate the working principle of telephone communication. In this working model, two actual telephones are connected with this  Strowger Telephone Exchange. Dailing from one telephone to another, the visitor can understand the working principle of the Ring tone circuit, Line circuits, Group selector circuit and Final selector.

Artificial Satellite

     A number of satellites of various shapes and sizes have been launched and are orbiting the earth at various distances from it. These satellites collect information on cosmic rays, electron density, solar radiation, cloud formation and infra-red radiation in space. This helps scientists to predict weather conditions. Some satellite also help in television programs, communication network, remote sensing, etc. This semi-diorama show-case illustrates the various Indian satellites in orbit.