WIRELESS TELEPHONY

Otago Daily Times, Issue 19995, 12 January 1927, Page 7

WIRELESS TELEPHONY

ENGLAND TO MONTREAL. SUCCESS OF SHORT-WAVE BEAM SYSTEM. (Press Association —By Telegraph—Copyright.' LONDON, January 10. The Marconi station at Bridgewater established telephonic communication with .Montreal using a short waive beam system. There were practically no atmospherics or lading after sunset as experienced in the New York service. Tlie Daily Express says that experts are recommending the beam system te ensure secrecy of transatlantic telephony, though* they admit that a fanshaped beam would create a fairly wide band of audibility at some points.—A. and X.Z. Cable.

MARGON I’ S EXPERIMENTS. RAPID PROGRESS EXPECTED. COMMUNICATION WITH AUSTRALIA. LONDON, January 10. (Received Jan. 11, at 8,5 p.m.) As a result of n three days’ test of the Australian Ream system during the weekend Marconis maintained a speed of 300 words a minute. They are therefore dispensing with the seven-day tost’, as was the case with Canada, and will hand over the system to the Port Office on Wednesday for a week’s test. If this is satisfactory the service will open immediately. It is understood that there is no hope of a variation of the decision that the charges will be two-thirds of the cable rates at the time the contract is signed. It is understood also that Marconi offered to begin wireless telephony tests to Australia within the space of a few weeks, but the Post Office wishes to concentrate on the perfection of wireless telegraphy first, and also to profit by the experience of the complexities of telephony with America. For instance, yesterday, in the trial with Ottawa, the Loudon speaker’s words came back as an echo in bis cars in a few seconds. The elimination of this, and also the achievement of complete secrecy, are problems to be solved. Records show that both South Africa and New Zealand heard the talks with America, but only isolated snatches of one’ voice only. “We ore confident that a year hence telephony to Australia will bo in operation ns :i commercial proposition. It, may be erratic nt times, but quite workable at certain periods of the day. We think that a short wave length will facilitate it. Furthermore, it is a hopeful sign/that the short wave service, to Cairo goes on when the transatlantic service completely fades out.” This was the opinion expressed by a high official who is in daily touch with all experiments.— A. and N.Z. Cable.