Ultra Short Waves

Radio Record, Volume VI, Issue 21, 2 December 1932, Page 8

Ultra Short Waves

Experimental Broadcasts H}XPERIMENTAL transmissions on the very short wavelengths, around seven metres, dre at present being conducted in Australia. Little is known of the qualities and peculiarities of these low. waves, which differ enormously from those of the band between 200 and 575 metres, on which the usual broadcasts take place, They are also quite distinct in their action from the ordinary short wayes of 20 to 80 metres, on Which long distance communication is usually conducted.

livery Sunday programmes for worldwide reception are broadcast from Pennant Hills, Sydney, on a wavelength of 28.5 metres. These programmes are now being radiated also on 7 metres in order to determine the range of ultra short waves. It may be found that they are only effective within the comparatively limited range of about 200 miles, It has been noticed that trans- | missions on 7 metres are peculiarly free © of the effect of static and there is little or no fading in the Signals. The suggestion has been made that these ultra | short waves may prove useful for pure- | ly local broadeast services for listeners within a limited range.