Marconi's Latest

Radio Record, Volume II, Issue 9, 14 September 1928, Page 11

Marconi's Latest

Music by Beam } STRIKING evidence of ‘the progress ‘ which is being made by the engineers of Marconi’s Wireless Telegraph Company in developing apparatus for the simultaneous transmission of telegraphy and telephony over beam wireless circuits was provided by a demonstration of the new apparatus given by Senator Marconi to officers of the Radio Corporation of America. While ordinary telegraph traffic was being transmitted to Great Britain from the Canadian terminal of the British-Canadian beam service near Montreal, a dance concert. was simultaneously switched on to the beam. Without interrupting the telegraph tratiic, or without being interrupted by it, the music from Canada was picked up at the British receiving station at Bridgewater, and reproduced at full volume on_ loud-speakers. An impromptu dance was held to it. Subsequently American engineers at the Bridgewater station heard addresses from friends in America so perfectly that every speaker could be recognised by his voice before his name was announced. It is claimed that in addition to greatly extending the amount of traffic which can be transmitted over a single beam, the new apparatus which makes it possible to use the beam simultaneously for telegraphy and telephony so affects the character of the wave radiated from the beam station that to a great extent signa) fading is prevented. It is expected that the various Empire beam services will shortly be used for the inter change of broadcasting programmes be tween the countries in the Empire.