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DISTRIBUTORS
CURRENT RADIO TOPICS.
NOTES AND NEWS LOCAL AND OTHERWISE.
BRITISH EXHIBITION.
WONDERFUL IMPROVEMENTS IN VALVE DESIGN.
[Special to the "Hongkong
Telegraph.
setall
concluded a good dent
pective custRMEE
the est and appearsh satisded, promising to call next take it away He
provements, reaulting in bettering broadcasting hour radio performance and also in the improved appearance of the models of the majority of the leading firms. Burndepts have Installed a mahogany instrument board in place of the charite panel and have made provision whereby the user can write in the position of all stations. This, new feature which is called the Etholog alimin
the
eller asked his customer if he would not like to hear what was going on. The headphones w adjusted, and the man'g fose lit up with pleasure, but as he lis- toned big smile gradually relaxed, and finally a frown puckered his brow. He removed the head-
A London, Aug. 28ates the necessity of referring The development of the radio to the condenser dal settings after phones and laid them down with valve has been one of the most the stations. in kestion have once an exclamation of disgust. remarkable achievemente In the been received Many other - Ife was not at all interested in history of wireless. Among the provements have been incorporate p
latest additions to the series of ed in the various Ethophone recei a long, and learned disquisition on power yalves is the Mullard vers, while the seven valve supper the wonders and antiquity of the P.M.2. In this case the specially heterodyne, known as the Great Wall of Ching, and he loft prepared filament, operating at Ethodyne, now slightly reduced in the place refusing to complete his two volts, has an emission surface size, has been made even more purchase. two and a half times greater than selective than before by several. 6-volt power valve. It is claim-improvements in design, and also ed that this filament gives a by the incorporation of new fea- much greater volumé for e similar tures In the frame serial. The input thán is oblainable with any name of Burndept is now so well other 2-volt power valve; and that known throughout the wireless it remains 80 ductile even after world that it has become almost a long use that it cannot be broken household, word; and yet compara- unless handled very roughly, tively few people, even among This particular type of filament radio experts, are aware of the camp on the market in the PM meaning of this trade name. It is valves less than a year ago; its of very simple origin, and is in two outstanding features being fact a portmanteau word made, ap economy and strength of constru" from Burnham and Deptford, The tion. These filaments have been trade mark "Burndent" first ap. adopted for two, four and six-valt peared on wireless apparatus as supplies, and in each type there long ago as 1918. At that time is a valve for general purposes the manufacturers were Burnham" and another for power. In ths & Company of Deptford, and so manufacture of the Osram D.E.2 the name Burndept came into bes valve it is essential that perfecting,
exactitude in the length of the filament should be obtained.
The evolution of the loud speak- With this purpose in view a special machine has been developer has opened up an enormous ed at the MO. valve works by number of markets outside the meana of which the filament is radio world, and the manufactur firmly attached to its support anders of amplifying apparatus. are cut to an exact length which finding many openings for their cannot vary between one valve and products which were quite un- another. In the new Osran thought of before. Alfred Graham, D.E.6 valve a specially construct-the, makers of the famous "Am ed filament support holds two fiat plion" loud speakers, were among springs on each end, which allow the first of the loud speaker manu- for the mounting in parellel of facturers to turn their attention to two separate dull emitting the amplification of public speech, filaments. The electron emission etc. Equipment for this purpose was is greatly increased by the pro-installed in the great cathedral vision of two filaments, while at St. Peter's in Rome last year, sugging on to the grid is prevent-when some 70,000 pilgrims were ed by the spring device.
thus enabled to hear every word of the ceremony of the canonisu tion of Sister Teresa. Since that One of the greatest problems time the usages to which this which originally confronted the scientific apparatus hins been put manufacturers of radio valves have been extraordinarily varied; was the question of evolving a and further enquiries are contin flement which would function ually being made by any number satisfactorily in the dull emitter of institutions as to the possibi type. This dimculty has now beer.lity of employing some system of entirely overcome so that the dull amplification for particular pur amitter valves of to-day are poses; in consequence of which
AMERICAN MILKS PRODUCTS CORPORATION universally recognised as being many methods of utilising such
Duddell Street. Tel. 0.3722.
ASAHI BEER
BREWED BY
DAI NIPPON BREWERY Co., Ltd.
TOKYO JAPAN
Specially Brewed for Ezpo
Sole Agents
Mitsul Bussan Kaisha, Ltd.
HONGKONG.
TROUBLE FREE
Plumbing and Sanitary Engineering is our *** Speciality
We employ expert workmen who carry out their work under European supervision.
Estimates and Specifications Fres
CE WARREN & CO., LTD. China Building (Fucing Queen's Theatro) Telephone 0. 269. ESTABLIESHED 1899.
far superior to the earlier types an equipment have since beer of bright emitters. For when the found.
filament of a valve la operating
at a high temperature, the con- tinual heating and cooling, caused
by the switching off and on. makes the "filament so exceedingly. brittle that even the slightest jar
RADIO IN INDIA.
is liable to break it. The Cossor TO LISTEN-IN ON ENGLAND. "Wuncell" valve operates at th very low temperature of 800
The possibility of broadcasting
degrees, and the glow which to three hundred million of people accompanied it to almost invisible has been opened up by the in the daylight. The ordinary establishing of two large radio bright emitter valves function atstations, the one in Bombay and The com a temperature in the neighbour-the other in Calcutta. hood of 2,000 degrees; in conse-pany owning these stations is being. quence, the dull emitter type will formed by Indians only: naturally have a much longer life The Government of Indin retains than its predecessor, since the the right to control broadcasting filament is not subjected to their times of crisis, and has licensed strains and stresses which were the company under similar terms unavoidable when the valves were to those which at present prevail working at very high tempera in the B.B.C.
turca.
STRONG APPEAL
The wireless season for tho
Anything wrapped in mystery British Isles opens in the month of September, and is to be heralded makes a strong appeal to the In- this year by a large exhibition at dian, and the scope for radio in Olympia. These exhibtions in the the East is boundless, but until past have usually been staged at
the Albert Hall but owing to the recently its operation has been
to a greatly increased number of firms restricted to a few low power sti which are exhibiting this year, the tions. One of these, in Calcutta, larger accommodation, afforded by
the hall at Olympin has been sent out a programme of music, found to be necessary. The or news, and talks twice daily, but ganisers of the Exhibition. are, of the station was dependent almost course, the National Association entirely on the good nature of the of Radio Manufactureres & Trade willing few who were able to give ers; but a new departure of the their services day by day. Some show this season is that it is not of the programmes consisted of In confined to members of the Asso-dian music, but the broadcasts ciation only as it has been in the were given chiefly by Europeans. past, although it is as usual an All-British exhibition..
There are few more pleasant ways from the purely European. point of view of spending hot The new season's range of Indian night than by reclining in à models naturally aliows a marked long chair, with the inevitable advance in dealgn In general in iced whisky in a tall glass by one's cluding very many important im- side, and a good loud speaker.
18
ALBERT
Only French Restaurant in Hongkong where the cooking is done by a French Cook Chef.
TIFFIN DINNER
$1.00 $1.25
For the best food and wine, where shall we go?
ALBERT'S!
22, Queen's Road, Contral Opposita 'kong Hotel Building
Insects Bring Disease to Thousands!
THESE tiny pests are more dangerous to our bealth and well being Than an invading army. Insects steal on us unawares carrying disease and death to everyone in the fady including the in- fant in arms. The fly brings cholera, typhoid, tuberculosis, infantile paralysis; the mosquito all kinds of deadly fevers; the bedbug carries germs from one person to another."
Flit spray clears the house in a few
minutes of disease bearing flies, mos- quitoes, bed bugs, cockroaches, ants, moths, fleas, and silverfish. It searches. out the cracks where insects hide and breed, destroying their eggs. Flit spray kills moths and their larvae which eat holes. Extensive tests showed that Flit spray did not stain the most delicate fabrics. Flit is clean and easy to use, death to insects but harmless to mankind. It is economy to use Fit and avoid disease. For sale everywhere.
Sole Agents for China: MUSTARD & Co., Ltd.
INCORPORATED UNDER THE COMPANTRY GENNAROKS OF, HONGKONG,
FLIT
-DESTROYS
Files, Mosquitacs-Mothe-Ante-Bed Bugs-Firas-Roaches
Many Dalper Boopalamid Exsania and Thais Kary Manuf
by: STANDARD OIL CO. [New Jerseyl
WOK
Improved Model
UNDERWOOD
PORTABLE TYPEWRITER
EQUIPPED WITH STANDARD
FOUR-BANK KEYBOARD.
We are very pleased to announce that in the course of a week or two, we shall receive Stocks of the latest product of the UNDERWOOD TYPEWRITER CO-a PORTABLE MOUEL equipped with exactly the same key-board us the Standard Office machine.
"For further particulars, please write or phone.
DODWELL & Co. Ltd.
QUEEN'S BUILDING: YGROUND FLOORT" OPPOSITE FERRY WHARF Also Gole Agents for RONEO OFFICE APPLIANCES
SAFE CABINET SAFES KEE LOX RIBBONS & CARBONS.“
PHONE 1030.0,