SHORT-WAVE RECEPTION

New Zealand Herald, Volume LXXV, Issue 23026, 2 May 1938, Page 12

SHORT-WAVE RECEPTION

Sir, —Short-wave programmes of music, news and general items from the overseas stations at Daventry, Melbourne, Berlin and elsewhere are so attractive nowadays that they are recognised by numerous listeners as an important part of the everyday wireless fare, yet the reception suffers from a disability. I refer to the irritating interference caused by the electrical generating systems of motor-vehicles, and possibly by the electrical reticulation, or tramway system. The marring of reception is characterised by insistent intermittent buzzing noises which sound like the drone of an aero engine. The sound commences very faintly, rapidly rises in » crescendo and then fades away as fast as it rose in intensity I believe that the radiation caused by the motor-vehicle generating system is due to an unshielded component nn<. that the trouble can be remedied l>v treatment similar to that oarried out ill aircraft practice. Although the period* of these interferences last only tor three or four seconds or so, yet the frequency with which they occur constitutes a serious menace to the popularity of short-wave wireless reception and seems to warrant an investigation on account of the importance of the matter. - "Kapier.