Before 4ZZ could start broadcasting in 1975, a transmitter was ordered from the U.S. But after it was lost on the dock in New York, 4ZZ's chief engineer at the time Ross Dannecker built the station's first transmitter.
Tony Abbott: national security changes likely
Mr Abbott flagged areas such as border security, residency, citizenship and government welfare as areas that could see a tightening in security.
The Prime Minister is expected to make the announcement in Parliament next week.
It comes after a review into the Martin Place Sydney siege where two hostages and a gunman died.