THE WIRELESS WORLD.

Otago Daily Times, Issue 18997, 19 October 1923, Page 2

THE WIRELESS WORLD.

NEWS AND NOTES. (By Magna Vox.) [ltems of news, comment, suggestions, etc., will be welcomed by “Magna Vox.”] The Raven-bourne Amenities Society has arranged with 4 Y.A. to bioadcast a wireless concert next Thursday evening. (hi Tuesday night Mr Arundel gave successful demonstration and address at the Methodist Central Mission, the proceeds ol which were towards purchasing a wireless set. for the Boys’ ‘.Tub. Mr Norman Arundel, of 4 V. 0.. has arranged to broadcast the next organ recital given by Dr Galway in First Church. Mr Arundel will also broadcast the Dunedin Philharmonic. Society's concert, which will take place next month. A novel feature will be special programmes printed for “Listeners-in’’ so that they may he able to follow the music more closely and adjust their instruments according to the volume” of sound received. “FREAK” RECEPTION. Novelties in wireless reception are now becoming fairly common, hut the following incident is surely without precedent. In a letter to “Magiia-Vox,” Mr J. G. Jackson, of 19 Galloway street, Mornington, stales; “On Saturday afternoon last afriend of mine came in and told me lie could hear music coming from his water tap. Ho was finite sober, so I went with him and to my surprise here was Schubert s

■•Serenade'' (a cornet solo) being given off from the tap. We asked another friend to come and hear it, so that there were three people listening. Me could hear the music distinctly six feet away from the tap. I made inquiries and found that a certain broadcasting station was playing that selection and 1 am writing to see if anyone else has had the same experience. If you are doubtful as to the veracity of the above incident, 1 will be pleased to show you the tup and let you hear tor yourself if you call at. Messrs Jas. M.’Gill and Son’s premises, Moray place.” Du referring the matter to Mr F. J. O’Neill, 4 Y.A., Moray place, he explained that such reception was quite in order as it was caused by having a “singing” condenser in circuit with his transmitting set. A NOVEL EVENING. The development of wireless is progressing so rapidly that it is now no longer necessary to have vocal or instrumental items with the performers or instruments actually on the stage at any entertainment. Although concerts have been given locally in this way, there have not been any such entertainments on a larger scale. A short time ago Mr ('. Umbers resigned from the Corporation Tramway’s Department in order to accent a position with Messrs C’cssen and Black, and at the entertainment and presentation, which will be given in his honour to-morrow night, all the items, with the exception of the Tramways Band selections, will ho broadcasted liy Mr Arundel from 4 Y.O. The following programme has been arranged : —Selection, Tramway Band; song, Mr W. 11. Mackenzie; duet, Miss Burt and Mr J. Swan; recitation. Miss Ethel Hillihe.r; song. Mr J. Swan: cornet solo. Mr N. 'Mathieson; song. Mr J. Paterson; gramophone selection; song, Miss Burt; euphonium solo, Mr W. Pennyeniok ; song. Mr Robl. Foote; bagpipe selection ; song, Miss Manilla ; Savoy Orchestra ; song, Miss Gardiner. VALVES AND CIRCUITS. A great deal has been hoard of the latest tvpe °ono valve sets and (heir performances, but the impression among a considerable number of amateurs is that anything possessing the name of valve is sufficient. This is a great mistake, as a good many have learnt fo their sorrow. Although there are quite a number of circuits it is impossible to achieve success in reception unless the right material is used. Amateurs are keenly interested m the Flewelling circuit, and inquiries are frequent as. lo what it consists of, .i he Flewelling circuit is a modification of the Armstrong super-regenerative tuner. One of (he main points of this circuit is that it does not require an aerial, a simple loop, or only a ground connection. Doing necessary. The only difference between the circuit and a standard single circuit regenerative tuner is the addition of three fixed condensers and a variable resistance. In this circuit only one tube is used, which functions as an oscillator, regenerator, and detector. The tube should be an amplifier, and the “B” battery from 60 lo 150 volts. An ideal tube is (he W.D. 11 drv ceil tube. The inductance may he coils (honeycomb) or a vnrio coupler, but the rotor would have to be rewound with at least 75 (unis of wire. The variable condensers should be equipped with a vor nier, and the filament rheostat also requires a vender if the W.D. 11 lube is used. A Rradlystat is the best, as tho tube will take a small current and cannot bo controlled by the ordinaly valve rheostat. SUPER AMPLIFYING. ■ Quito a sensation was caused in Dunedin on Wednesday night when Mr Norman Arundel, of 4 Y. 0., gave a demonstration of super amplifying, and the music was heard all over the town. Mr Arundel used a special power amplifier and loud speaker in conjunction with two 250 watt valves, and the volume of sound produced was enormous:. Although only in its expel imcuial stages this super amplying has great possibilities for large gatherings at sports functions could be entertained and announcements made by this means. When close to the instrument the sound was deafening, and the eardrums were painful for some time afterwards, but outside tho operating room the sound was, of course, not confined, and it was not so harsh.

BROADCASTING MARKET REPORfS. “Meat and Wool,” a journal published in Wellington in the intsrests of the farming community, has made arrangements throughout New Zealand for the broadcasting of market reports so that paatoralisis, many of whom now possess wireless sets, will learn the slate of the Homo markets as soon as they are cabled to New Zealand without waiting for the arrival of the newspapers. “Meat and Wool” has appointed Mr F. J. O’Neill official “broadcaster” for Otago and Southland, and he broadcasted tnc London market reports for the first time on Wednesday night. Air O’Neill will broadcast these reports three nights m each week. Official broadcasters have also commenced operations in Auckland, Wellington, and Christchurch. This is the first time that wireless in New Zealand has been applied to the issue of news as apait from entertainment. These reports should be of value to farmers possessing wireless telephone _ apparatus. The practice of “listening-in” is becoming general in Australia and America, and in ibis country a great many primary producers are now taking an interest n the subject. In Australia, broadcasting of market reports commenced simultaneously wilh New Zealand. In Australia the Sydney Morning Herald is the authority and in’New Zealand “Meal and Wool.” It is estimated that some 6COO people listen to this broadcasting of news nightly, .■mil lhick-blocks farmers will appreciate up-to-date information of the nature nieulioned. The price of a wireless receiving apparalus is now within the i-ach of. most people, and should developments occur here on the same scale as in other countries, it should not be long before lisleners-in are numbered in tens of thousands.