Television from its start in Melbourne has had phenomenal expansion until today there are nearly a quarter of a million television receiving sets in Melbourne and the surrounding districts. The three stations - A B V 2; G T V 9 and H S V 7 - each transmit from 45 - 57 hours a week to serve 220 000 television sets and an estimated viewing audience of 620 000 Victorians. Technicians, lighting engineers, cameramen, film librarians and technical directors from Holland, Germany, Britain, Italy, Switzerland and Malta are all prominent members of Melbourne's three television stations. Swiss-born Walter Ritter, 25, started at GTV9 two years ago as a cable installation mechanic. Now he is technical director of Australia's top rating live show "In Melbourne Tonight"