ASSISTING AVIATION

Radio Record, Volume I, Issue 34, 9 March 1928, Page 14

ASSISTING AVIATION

NEW STA'TION AT CROYDON, Among the developments in connection with the new London Air Port at Crosdon is an entirely new wireless station. This was erected for the Air Ministry by Marconi’s Wireless Tele‘graph Co., Ltd., to replace the one that has done duty there for the last seven years. The new station consists of a group of four 3-kilowatt wireless transmitters operated in conjunction with a wireless direction finding recciyer, The transmitters are capable ef telephonic and continuous wave and interrupted continuous wave telegraphic transmission, the wave range being from 800 to 2000 metres. Independent Grive circuits maintain constancy of frequency .and wave-length. Energy for thie trausmitters is supplicd by a comnion motor alternator gtoup, the power from which may be switched on to any of the transmitters. The new wireless direction finding receiver for Croydon, specially designed tor this work by the Research Department of the Marconi Company, las remarkably sclective characteristics, and incorporates the latest filtering and amplifying devices. It is arranged

so that, if required, two or more citcuits can be operated on different wave-lengths for the reception of telephony and telegraphy on the same aetials. In order to keep the neighbourhood of the acrodrome as free as possible from obstruction the wireless masts and transmitters are being erected two or three miles from the Air Port aud operated by the ‘remote control" systein.