ON the AIR Fare For Listeners-In

Sun (Auckland), Volume 1, Issue 13, 6 April 1927, Page 11

ON the AIR Fare For Listeners-In

NEW ZEALAND PROGRAMMES New Zealand broadcasting stations transmit as follow: IYA (AUCKLAND), 420 metres, 500 watts This evening’s programme is as follows: “ to 4 -30 p.m.—Afternoon session. 7.15 p.m. to 7.45 p.m.—News and reports, etc. 8 p.m. to 10 p.m.—Chimes; relay of orchestra selections; pianoforte solo, "So-aa-ta ini G. Op 14, No. 2” (Beethoven), Mr. E. Bell: soprano solo, “Mighty Lak a Rose” (E. Nevin), Miss D. Youd; baritone solo, “King Charles,” Mr. D. Wrathall; contralto solo, “When Song is Sweet” (Sans Souci), Miss M. Williamson; violin solo, “Liebeslied” (Kreisler), Mr. P. Bretnall; mezzo-soprano, “Life and Death” (Coleridge Taylor), Miss C. Duncan; duet, ‘ Paradise for Two,” Miss D. Youd and Mr. D. Wrathall; pianoforte solo, ‘Coronach” (Barratt), Mr. E. Bell; contralto solo, “Kashmiri Song” (Finden), Miss Williamson; violin solo, “Serenata,” Mr. P. Bretnall; soprano solo, "Tiptoe” (Carew), Miss D. Youd; weather report and interval; relay of orchestral selections from the Majestic Theatre; baritone solo, “Song of the Flea,” Mr. D. Wrathall; soprano solo, “Good Morning, Brother Sunshine" (Lehman), Miss C. Duncan; duet, "I Wish I were a Tiny Bird,” Misses Youd and Williamson; pianoforte solo, "Danse Negre” (Scott), Mr. E. Bell; contralto solo, selected, Miss Williamson; violin solo, “Liebessieud" (Kreisler), Mr. P. Bretnall; trio, "Annie Laurie,” Misses Youd and Williamson and Mr. Wrathall; soprano solo, "Ave Maria” (Kahn), Miss C. Duncan; baritone solo, "Could I but Express in Song” (Malashkin), Mr. Wrathall; soprano solo, "Hindoo Song” (Bramberg), Miss D. Youd. 3YA (CHRISTCHURCH), 400 metres 500 watts. This'evening’s programme is as follows: 3 p.m. to 4.30 p.m.—Afternoon concert. 6.30 p.m. to 7 p.m.—Children’s session; Uncle Jack. 7.15 p.m. to 7.45 p.m.—News and reports, etc. 8 p.m. to 10 p.m.—Chimes; relay of orchestral selections by the Everybody’s Theatre orchestra under the direction of Mr. W. J. Bellingham, F.S.M.; soprano solos, (a) ‘The Wind,” (b) “Garden Gossips,” Miss Thelma Ayers; violin solo, “Premier Concerto” (Accolag), Miss Joan Carter; baritone solo, “Lorraine, Lorraine, Lorree,” Mr. C. L. Richards; instrumental trios, (a) “Ase’s Death” (Peer Gynt), (b) “Anitra’s Dance” (Grieg), the Misses Carter; contralto solos, (a) “To Music” (Schubert), (b) “Sapphic Ode” (Brahms), Mrs. Madelaine Willcox; ’cello solo, “Romance” (Squire), Miss Charlotte Carter; tenor solo, “All hail thou dwelling” (Gounod), Mr. Ernest Rogers; interval; relay of orchestral selections from the Everybody’s Theatre; soprano solo, selected, Miss Thelma Ayers; violin solo, “Ave Maria” (Gounod), Miss Joan Carter; baritone solo, selected, Mr. C. L. Richards; reading by Miss Lucy Cowan from Stephen Leacock; instrumental trio, (a) ‘Gracieuse” (Elliott), (b) “Home, Sweet Home” (Billl), Misses Carter; contralto solo, “The Enchantress” (Hatton), Mrs. Madelaine Willcox; reading by Miss Lucy Cowan; tenor solo, “Good-night, Beloved,” Mr. E. Rogers. 2YK (WELLINGTON), 295 metres, 120 watts. This evening’s programme is as follows; 7.45 p.m. to 10 p.m.—Reports and announcements; studio concert by the band of R.M.S. Tamaroa by permission of Captain Hartman; assisting artists. 4YA (DUNEDIN), 380 metres, 750 watts. There will be no transmission this evening. NOTES Atmospheric conditions were fairly good generally last evening. Australian and New Zealand stations came in well, some good programmes being transmitted. ELECTRICAL INTERFERENCE One remedy for electrical interference with radio reception due to sparking apparatus is to eliminate the spark. This is possible if the spark is an electrical leak and not necessary to the operation of the machine in which it occurs. Many very useful electrical machines, however, require for their operation the making and breaking of electrical circuits while they are carrying current, and whenever this happens a spark is produced. It is impossible to eliminate these machines, so that it is necessary to make them of such nature or so arrange the circuits that the radio-frequency current is reduced or prevented from radiating. To prevent the radio-frequency current produced by a spark from getting on to the lines connecting the sparking apparatus some form of filter circuit is necessary. A condenser (1 microfarad more or less) connected across the sparking points will short-circuit a considerable amount of the radio-frequency current, or a condenser connected from each side of the line to earth will serve same purpose. A c hoke coil in each side of the line, in addition to the condensers connected to earth, forms a simple filter circuit which should prevent frequencies in the broadcast range from getting on the line. A high inductance or high, resistance connected in each side of the line changes the characteristics of Ihe circuit so as to reduce the power radiated. If such a filter circuit is not effective or is impracticable, the apparatus may in some cases be surrounded by a solid metal sheet screen, which is thoroughly earthed. This may be difflWlien any connections are made to a power line, in order to avoid fire and personal injury, only apparatus that has been carefully tested as to voltage and current-carrying capacity should be used. Additions to the lines should be made onlv by qualified persons and then onl> with permission of the owners of the lines. DO AERIALS ATTRACT LIGHTNING? ACTIVITY

It is common experience in all tries where broadcasting co JJjJ“ c *® d that many of the general public are unwilling to join in the ranks of listeners due to a fear that the erection of a radio aerial will attract” bKhtmng and theiefore prove a source of dangei. That , of course. an entirely erroneous idea since an aerial installation, properly designed, will act as a preventive to OD lects in the vicinity being struck by a lightning discharge. This may be stood easily when the cause of .lightning is realised. During the period of l thunder-storm the drops of water In cloudiare highly charged with electric- ;,.. Thus voltages are built up between Cloud umi cloud or cloud and earth sufficiently liigli to break do " n a * he tn r ®;‘.?‘ e 'e^'^^arSr.r™ hi U’v" the U neighbouring "cloud can be reduced. The ordinary bshtnlng conductor accomplishes this because fr its points there streams off from the 11't h electricity of the right kind to n Verla* high above" 5 surrounding objects EEk , r il I rly c.-d r sin' ;i^e tl r i cfn i ?r rou i! were t*> strike the aerial the energy fn a single flash would be suffl.Tent to melt the wire immediately, but tie rarity of such an occurrenceJs ev,mlTThTe'there aC are 2.500.000 listeners .nthpntic case could be found of an aeriT 1 having Teen struck by hghtn.ng anTTo B nclssi?e S i e nfo e maTon Jbf possibill tv of an aerial being struck by light nng is practically negligible. Provided it is earthed during the course of the thunderstorm. NERVOUS AND ELECTRICAL The endeavour to find a parallel between nervous and electrical activity has continued since the first discovery of galvanic electricity. In late years the idea that the brain might be a source of magnetic waves has been a theme for

many investigations. Professor Fernando I Cazzamalli, of the University of Milan, j Italy, has made public experimental tests ! with a wavemeter in a shielded room, j leading him to the conclusion that the mental wavelength is between four and i 100 metres. This will 2>e read sceptically j by most "amateurs.” ODDS AND ENDS An old lady went into a radio supply j store one day and said that her room ! was very stuffy and that .she wished to buy one of those radio fan£ that she had heard so much about. The guardians of an English infirmarydecided not to instal radio, as it would “make the place too attractive!” "Your neighbour owns everything above his property right up \o heaven, and I am afraid you will have to take your aerial down.” said an English magistrate to a defendant vYio had stretched his aerial across his neighbour’s garden. Keep the dust out of your receiver and out of the loud speaker; clean-up* days should not be confined to the backyard. As a pick-up device, the loop aeayal is never as efficient as the crudest outside aerial. To use one successfully, several stages of high-frequency amplification are necessary, costing far more than outdoor aerial does.