Complex sentence: In October 1939 their first relay station 6TZ came on Air at Waterloo, 108 miles from Perth using overhead landlines this station had to generate its own power, so the on site Technicians had to be familiar with diesel power generating plants.
Split into simpler sentences: In October 1939 their first relay station 6TZ came on air at Waterloo, 108 miles from Perth, using overhead landlines. This station had to generate its own power, so the on site technicians had to be familiar with diesel power generating plants.