British Official Arrangements to be Extended sexcraL 40 ux ".-¢, HERALD"
Short-wave amateur wireless enthusiasts, possessing a knowledge of Morse, will be interested to know that the GP.O. London is making special arrangements for improving the ception of the British OMeisl Wire less News Service. An additional Wansmitter is to be employed in Sending out that service in future. Transmission will therefore be effec: ted simultaneously upon one long wave and two short waves instead of upon one long wave and one short wave as hitherto, Those responsible hope that the uso of this additional transmitter will Improve reception in parts of the world where difficulties have hitherto been experienced, In order to collect further data as to the suitability of wave lengths, the GP.O, immediately the new trans-to function, will intro-weeks programme of short wave test transmissions, Each week will begin on Sunday Jat "20.00 G.M-T. and "end on Saturday at 2830 GMT, The rst week will be on GIM frequency, the second on GIL, the third on GIM, the fourth on'GIL, the fifth on JGIM, the sixth on GIL. "The seventh Jand subsequent weeks' will be IGIM. The actual starting of these test transmissions will be announced telegram.
The Wireless Telegraphy Section of the GP.O. are of opinion that the Oxford GIM frequency 12,975 ke/s (23.18 metres) would be more effective generally than Oxford GIL 14,955 e/s {20.08 metres). There is, how= ever, the question of interference to be considered, and as there is some possibility that the GIM frequency be more subject to interference GIL, it Is considered desirable to conduct these preliminary tests on both "frequencies befor iding which should be used. permanently, Meanwhile, and in future, the long-wave transmission will continue to be sent from Rugby GBR on a wave. length of 18,750 metres,
Text read from the printed page and cleaned; old type leaves the occasional error.