RADIO PROGRAMMES

Stratford Evening Post, Issue 90, 4 July 1930, Page 2

RADIO PROGRAMMES

FRIDAY, JULY ft, 1930. IYA AUCKLAND. E 5.0: Children’s session. 6.0: Dinner session. 7.0; News session. 7.40 ; Talk, Mr W. E. G. Wheeler, “Esperanto”. 8.0; C'hinies; studio concert. JSYA WELLINGTON. 5.0: Ohildrea’s hour 0,0 ; Dinner session. 70 : News session. 7.40: Lecturette —Mr D. McKenzie “The Laws of Rugby”. 8.0 • Chimes; operatic and misceN laneous programme. 3YA CHRISTCHURCH. 5.0: Children's session. 6.0; Dinner session. 7.0 News session 8.0: Chime's; concert ITonj g&io Radio Olympia. 4YA DUNEDIN. 5.0: Chiidrerds session. 6.0: Dinner musi«, 7.0: News session. 8.0: Chimes; relay of 3YA. FAULTY RECEPTION. A recent article in this column dealt with the relation between fading; and distortion in broadcasting. It is difficult to make the explanation clear to everybody, hut it may l>e interesting to produce evidence that 2YA is not the only innocent ‘offender’ in the matter. The following appeared in tho Sydney Bulletin recently:— “A powerful subsidiary broadcasting station is to he built, probably about 30 miles from Albnjryj This aims at overcoming tho blind spots where failing occurs duo to the curious skipping 1 habit of the radio wave. Places up to 85 miles from Melbourne get 3LO well enough; thence on to 300 miles ’ the reception is had to rotten. Beyond 300 miles it becomes quite good again, so that listeners at Bonrko can sometimes hear Campoven’s Gaslight sonata) a> dashed sight better \ than Bairnsdalo can. The reason is that there are two waves, a ground wave and one that surges into the empyrean until it hits Hoai visido’s layer, the world’s theoretical ceiling. The ground wave serves nearby places and is apt to be dissipated by mineral bearing lulls, tall mountains, and other obstructions; tho sky wave is immune from those influences. The same phenomenon is manifest at Canberra, 'where Melbourne is frequently received iar better than is Sydney”. A TELEVISION STUNT. 1 Amalgamated Wireless (Australasia), Ltd., recently participated in a television test between America and Australia (says the Melbourne “Age”). Tho . broadcast, it is explained, originated at Schenectady, where Dr. K. F., W. Alexanderson broadcasted a television imago of-a rectangular design painted in black on a white card. Tbo transmission was picked up by the Amalgamated Wireless receiving station at La Boron.so, carried by land line to Pennant Hills transmitting centre, and re-broadcast through the 20-kilo_ watt transmitter 2ME, which Amalgamated Wireless is now using for the wireless telephony service to England. . Dr. Alexanderson received tho transmission back to Schenectady from Sydney, a total,distance off 20,000 miles American newspapers quote him as hein gvory pleased with the imago as then appearing. In this rob road calst, he said, it was much the same as though tho imago, seen in one pail of rippled water had been reflected in still another pail of rippled water. Corrospoudino- to the rebroadcast hack from Australia, naturally there would bo considerable distortion, but the double distortion did not entirely wipe out the image. Tho experiment was carried on for about five minutes, and many times during this period the lines of the rectangle wore distinct enough to tho observers to distinguish the picture being broadcast. The image would come in single design, and would be quite clear for a period of time. Then if would be doubled, tripled, or quadrupled in some sort or cycle. It would end in a blur which would make the result indistinguishable, but would start over again as the cycle returned to be. come recognisable.' once more. It was as though niiu was actually looking at the various paths the signals had taken, and we were watching them come into phase and stiyp.oiit again.

BROADCAST OF SECOND TF.SI. Arrangements have hoeu made lor Mr. ]*,. (1. Law to iustal a radio iu t-lio grandstand at Victoria Park to. morrow, «o that patrons may listen to tlm 2nd Test.