WIRELESS TELEPHONY
GREAT ADVANCES MADE. j The extraordinary advances wade in i 'wireless telephony during.the last year or two is indicated by the British Department of Overseas Trade in an official bulletin. Commercial wireless telephony can now lie effective over considerable distances, and 'the Marconi Company is producing portable wireless telephone eels with a guaranteed range of 150 miles, this range beisig half the obtainable in favourable circumstances. For fixed stations, sets with a guaranteed range of ovef 1000 miles are on tho Market. _ - A feature of the wireless telephone is the absence of the distraction found in tlie ordinary telephone; the sound is 6hort and sharp. Wireless telephony has been adopted as a regular means of communication for the London-Paris aeroplane service. A traveller by aeroplane can maintain conversation with a land station 150 miles away, and miniature telephone exchanges can be established oil aeroplanes so that they-may talk to one another as, well as to land.stations. A calling device has been evolved, so that continuous attendance at the receiver is not necessary.
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Dominion, Volume 13, Issue 195, 13 May 1920, Page 4
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174WIRELESS TELEPHONY Dominion, Volume 13, Issue 195, 13 May 1920, Page 4
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