Published Resources Details
Journal Article
- Title
- Notes on Victorian-Tasmanian Telephone Cable
- In
- Journal of the Institution of Engineers, Australia
- Imprint
- vol. 8, no. 6, Jun 1936, pp. 236-239
- Description
Report of Lecture presented by John Murray Crawford MBE MIEAust, Chief Engineer, Postmaster-General's Department, before the Melbourne Division of The Institution on 19th May, 1936.
- Abstract
The recent opening for traffic of the Victorian-Tasmanian Telephone Cable was marked by the Commonwealth Government by the issue of a special commemorative stamp. Considered as an engineering work, there are undoubtedly aspects of the project which lift it above the level of the ordinary job of submarine cable laying.
It is the longest submarine telephone cable in the world, and its transmission efficiency the highest yet attained. Though there are two other submarine telephone cables in the world of a somewhat similar type - one connecting Teneriffe with Grand Canary in the Canary Islands, and the other connecting Key West with Havana in the United States of America - this is the longest and in many respects the most remarkable cable in existence. The Canary Island cable is 40 nautical miles in length, the American one is 108.6 nautical miles in length, but the Tasmanian one is 160.97 nautical miles, and whereas the Canary Island and American cables can operate up to a carrier frequency of 28,000 cycles per second, the Tasmanian cable is guaranteed to operate up to 42,500, and its actual performance is considerably exceeding the guarantee.