WIRELESS AT SEA.
LONG-DISTANCE TELEPHONY.
(bt cable—t-phess association—cqrißiGHT.) (AUSTRALIAN AND N.Z. CABLE ASSOCIATION.)
NEW YORK, July 3
Tho uso of wireless telephony on a commercial basis between persons on ships at sea and on land has been proved pratical by a conversation between two sisters, ouo on the German liner Columbus, and the other on. tho Deutschland, when the ships were 150 miles apart. They talked for eight minutes at a exist of 10s.
The wireless operator of the Columbus said ho had Used the invention to converse successfully with other German liners, tlio JMunehen, Stuttgart, and Albert Ballin, as well as with land stations. The apparatus is a duplex receiving and sending set, operating on wavelengths of 1800 and 14(50 metres, to overcome tho interference between the receiving and sending antenna), which has hitherto prevented simultaneous operation. The Tylefunken Company, of Germany, which controls the invention, anticipates lowering tho charges for conversations when tho device is completely out of tho experimental stage, where it has been for two years.
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Press, Volume LXI, Issue 18426, 6 July 1925, Page 9
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170WIRELESS AT SEA. Press, Volume LXI, Issue 18426, 6 July 1925, Page 9
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