1928-07-31 — Page 10

10

A Large

Selection

of

Newest.

Neckwear

Also

Neckwear

and

Handkerchief

Sets.

YEE

SANG

FAT

Co.

THE CHINA MAIL,

RADIO TOPICS

CONCERNING YOUR VALVE FILAMENT.

[By Ultimax.]

The efficiency of the filaments of

will be required in order to obtain the necessary emission from the filament.

THE MODERN VALVE. Complaints are often made that

But are the programmes broad- cast. too national? Do they com.: mend the qualities of one nation to another or do they pass on those matters that divido nation from na- tion?

Italy and Russia, the valves we use in our receiving in many cases one cannot tell whe

American programmes are dis- sets is an important matter. Their ther a modern dull-emitter valve is

To Цер an sole function is to supply an emie-alight. The criticism is true, but tinctly American.. sion of electrons, and in the early apart from the fact that the mag American parlance, they are one days we had short and compara-nealum "getter" generally obscures hundred per cent. American; they tively thick filaments of tungsten. the top of the glass bulb, the fila- contain comment on other nations, some types of modern national defence Items, narrow was found to be ment of This substance

many things that capable of giving considerable valves will give the full emission outlooks and emission when heated to 2,500' de- necessary at such a low tempera- might disturb another nation.

Italian and Russian programmes grees Centigrade. As the fusing ture that it will not.. even glow. point of tungaten is about 6,300 de- The flament is actually operating are also essentially national, as if grees, it will be seen that the tem at a "black boat" and no visible the purpose of the stations were to broadcast doc- a satisfactory indications is obtained as to whe- no other than perature at which

la emitting or trines that these two nations want- emission could be obtained is con- ther the filament

not. It is possible in some ined the world to know about 'and siderably below this point.

The filament was heated by the stances to remove the "getter," or to accept as their constitutional L.T. accumulator to incandescence, silver coating on the inside of, a form of government.

Of course each nation must have and, when it reached white heat, valve, by holding a lighted match electrons wore given off and the under the part of the bulb to be its broadcast programmes with emission was attracted to the ad-cleared. We would, however, warn that spice of national sentiment jacent plate of the valve, positive- anyone not to try this notion on which gets the point of contact ly charged by the H.T. battery for a good valve for fear of accidents. with daily life and routine, but it this particular purpose, the flow of It is wiser to experiment for a electrons at the same time being start on a burnt-out valve. controlled by a grid or third elec- trodo situated between the plate and the filament.

THE EMISSION FACTOR.

is possible that thle can be over- done. The B.B.C. is keeping the balance well. If others followed

the The actual emission from a fila- their example, especially in ment of given length and diameter matter of talke, radio would be sav- The valve in those days would depends upon a constant known as ed the danger of fomenting differ- only amplify powers of the order the emission factor of the parti- ences.

International Understanding. EVERYBODY KNOWS of a microwatt, and the flament calar substance used in the con-

The If there could be established an in the process would take 3 or struction of the filament. watts continuously from the ac- thorium-coated flament will re-international understanding on the cumulator in order to maintain it quire a temperature of 1,500 de- things that should be broadcast the respective national In the state of white heat neces-grees C. for a certain emission, from

of the while the sary for the production

modern glowless fla studios radio could, be the messen- electron emission. With these mont will only need about half to ger of peace between nation and facts in mind, it was not long be three-quarters of this temporature, nation. Here is an Instrument for fore the enormous inefficiency of the normal operating point being welding the nations together ir such a device was realised, and below red heat. And the advan- the bonds of peace and unity.

a long and the ery went up for better filaments tage is we can use

Cleaners International who have become a house- hold speaking for their good works.

ים

a

THE INTERNATIONAL DRY CLEANING & DYEING CO.

36, Nathan Road,

Kowloon.

19, Wyndham Street, 143, Wong Nel Cheong Road,

Hong Hung.

Happy Valley."

Hong Kong's Artistic Photographers PHOTO TAKEN DAY AND NIGHT.

THE

YING MING STUDIO No. 50-52, Queen's Road Central. DEVELOPING, PRINTING AND ENLARGING. (Official Photographers of the "China Mail.")

BUSINESS DIRECTORY.

Bookbinders.

THE "CHINA MAIL," Book-

binders.

No. 3a, Wyndham Street.

Dentist,

· HARRY FONG, Dentist,

1st floor, No. 74, Queen's Road

Hair Dressers &

Booksellers.

LEE YEE,

Ladies" and Gentlemen's

Hair Dressers

and Booksellers.

No. 12, D'Aguilar Street.

(opposite Queen's Theatre).

Central Tel. Central No. 1255. Hair Dressing Saloon.

Electrical Supplies.

THE GLOBE FOOK CHEONG ELECTRICAL SUPPLY CO., LTD.

72, Queen's Road, Central. Tel. C. 3270,

Engineers &...

Shipbuilders.

W. 8. BAILEY & CO., LTD.,

-Engineers and Shipbuilders,

Kowloon Bay. Now Work & Repairs:

Call Flag "L" Sole Agents for Kelvin Motors.

HANSON SKEY,

Ladies' and Gentlemen's

First Class

Hair DresseTS,

45, Des Voeux Rd. C., H.K.

Optician.

so that the watts consumed should robust filament, plus the benefit

be reduced to a more reasonable figure.

given by the extra length and still only take a very small current from the accumulator of 75 to 100 milli amps, in order to operate it.

The early dull-emissions were

INCREASED LIFE.

RADIO NOTES.

The attempt to exclude all out- aide, broadcasting from Japan has apparently been abandoned, says

A good deal of water has pass ed under the bridge since those days, and with the gradual im- provement in design we have to-Inclined to be microphonic, and a the "Japan Chronicle" of July 14. day efficient filaments which only further improvement towards the Instead the authorities are to de- ideal in this respect. was in the vote themselves to finding out consume a fraction of a watt.

BRIGHT-EMITTER FILAMENT. mechanical means taken to hold the what is coming into the country. The Foreign Section of the local The bright-emitter flament was filaments.

Kencho is reported to have equip- generally made of slightly thoriat

ped itself with a splendid radio ed tungsten, as it was found that

In addition to these considera-set for this purpose, which will a small percentage of thorium had tions, as the modern filament is enable them to hear every thing

its the effect of improving

operating at a comparatively low mechanical strength, and prevent temperature, it is not continually from Habarvosk in the north to ed the filament from crystallising raised to a white heat and allow Sydney in the south. Special off and actually breaking, after it had ed to cool again as in the early cials have been appointed to listen

to the radio every night been in use for a comparatively type of bright-emitter. The reault! short time. The early types were is that the filament is not subject short and thick, and, apart from to periodic internal stresses, and the heavy current demand, suffer-providing we do not raise the fila ed from two serious defects. In ment temperature to an excessive the first place, the centre of the degree by over-running the valve, Alament was very hot and the we should get a greatly increased ends, a short distance away, wore life..

cool. This end cooling was a large source of in efficiency, for it meant an expen diture of energy which was not converted into electrons, together with a good deal of useless hent dissipation.

comparatively

-

TUESDAY, JULY 31, 1928.

DAILY CROSSWORD PUZZLE.

(This cross-word puzzle has been made by an expert but our readers are warned to look out for occasional phonetic spellings, such as harbor, plow, and altho,)

Þ

16 77

10

17

18

39

24

$22

23

234

25

26

27

28

229

[30 131

32

133

135

36

ST 18

39

140 41 12

:

एम

爬

46

243

47

50 51

156

157

53

58

159

[6]

163

י.

4:51|

48 19

155

HORIZONTAL 1-A great Austrailan

soprano

-What is the musical

form of dramat

-A feather nack

wrap for women 11-A malt drink 12-Who was the firet Christian emperor of Rome? 18-A winnowing

instrument 17-Melodious 18-Posesssive pronoun 20-Quson of the fairios 21-Hiwallan food 22-A Roman, highway 24-The fruit of the

rese

26-Fragranco

28-A pagoda In Japans 30-A plant of the

goosefoot family 82-To binder

#4-A place whare gold le washed from the ground

35-Affubla

64

52

THE INTERNATIONAL BYNDICATE.

HORIZONTAL (Cont.) ]· VERTICAL (Cont.) 48-The Greek letter T16-To travel (post) 50 Likely 62–Devoured

89-To not in

antagonium

66-A printer's

spprentios 57-Bux Relating tol 58-King of the Franks {61-Qirl's name

63-Paolal neuralgia". 63-Those who foretell

eventa

|64-One, who recolves a

.gift

VERTICAL

B-Vary black

..

19-8ituation

}20-To impale

|21-A amali parrot

23-Cleaning 25-Through

27-A elty in Georgia,

U. 8.

20-A mountain range

between Mongolia and Biberia

11-A larist. 38-Appropriate 54-A loguma 16-To absorb slowly 17-Ta badook

[38-An object of sacred

reverence

B-A world-elty (abbr.)|40-A dearse of the 4-The deep male,

singing volan

-A famous italian

prima donna 7-A Hebrew high”.

priest

B-A noted Italia

painter

10-To go (800) 26-To set the pace for 12-What navigator

discovered Labrador in 14977

A boat crew

39-To forbear o

43-Who was the Greek] 15-To taunt

goddess of peace? | 14-Aivar connecting

44-To obscure

46-Girl's name

47-Comrade

aubilme Parte |41–To satiate

42-Artlole |44-An encounter

between two contending parties |45–To mutlinte |49-A French possession ́Tri West Ankara {51-A famous Greak philosopher £* 5+-Personal pronoun 58-To-Irritate

57-Once (Beat)

Lake Lagods and Gulf of Finland

50-Hall! (Latin)'

18-Treating of morale 180-Alcoholic iquor

(The solution of the above cross-word puzzle will appear in to-morrow's issue along with a new cross-word puzzle.)

BEAM RADIO.

OPENING OF CANADA. AUSTRALIA LINK.

American Seta in Japan. The swamping of Japan with American built wireless sets is foreshadowed by

that the newe Brunner, Mond and Co. (Japan), Ltd., shortly to be known as Im- perial Chemical Industries (Japan),: Ltd., has entered into an agree Another essential point is that ment with the Atwater Kent Manu- the filament should be straight, facturing Co., to act as distribu- that is coaxial with the grid and tors of the wireless receivers made

London, June 10. plate of the valve, Any appre-by the latter: firm. ⠀

A further important develop- ciate sagging tends to distort the Of recent years popular inter-ment in the use of the Marconi short characteristics and may even in est in wireless has greatly increas- wave beam system for Imperial time touch the grid. To overcome ed among Japanese people, and communications took place to-day, this difficulty, the bright-emitter there seems little doubt that the when the Beam stations built for Alament was generally connected American sets will meet with a communication between Canada and to its support through a spiral large sale.

Australia will be officially opened spring, but with the modern ten-

It will be seen, therefore, that a short filament should be avoid- ed, unless certain precautions are taken, and when the length is in creased we not only obtain a

dency in design towards lower fila- German Broadcast Veto-The for public service. greater emission of electrons but ment currents, it was found that German Cabinet has decided not

•

This new service will be of the

YESTERDAY'S SOLUTION.

APROW

TASTER

LIDIA RUT PORPOISE MUSER RI TERSE ETON RISE P SEM AUGEAN CUT EARL (SERE WAGE TARS 15H ORATOR SHE NEAT STUNNLCON SATED ON BADGE U TEMPERED:

R

OUT ALL

EVENTS PLENTY

ŠTHE INTERNATIONAL ZIMIGATEL

we can at the same time have a the lower the current the greater to permit radio to be used for greatest importance to the large through Canada the periods when smaller diameter filament with leass the tendency towards the micro-broadcasting election propaganda business interests which are com

current consumption. In addition phoaic noise so long as the filament in the General Elections to this the effect of the cooling at the ends of the longer filament will

be relatively much less serious.

"fading" interferes with communi. which mon to Canada and Australasia, and cation will be practically non- it has the additional importance of existent and the Australian Beam was sprung. As will be seen from will probably be held in May. the diagram, the modern long.

The Kootwijk (Holland) Station adding another link to the system telegraph service thus rendered still The Canadian Beam Stations for filament is rigidly held at five transmite every Wednesday from 2 of Beam wireless communication be more efficient.

tween England and Australia. THE FILAMENT DIAMETER.

points, nospring being required, to 3 p.m. on 18 metres..

+ •

Hitherto, Beam messages from the Australian service are built on There is of course a limit to and owing to the low heating tem- the reduction of the filament dia-perature, there is no danger of the Canada la projecting a powerful England to Australia can be trans- the same sites, near Montreal, from meter depending on the process of filament sagging or touching the and up-to-date broadcasting station mitted over two routes direct, one which the Beam service with Eng eastward over Northern Europe, land le conducted and the Austra manufacture, and also as regards grid, because there is little ten-at. Brandon.

Russia and China, and the other lian Beam Stations, near Melbourne,

the performance of the valve when dency to expand. The suspension

It is tested. If one could obtain points are made of strong wire, For the benefit of the many re-westward over the northern part of also, share the sites of the stations the advantage of a long filament and these improvements are gen-gidents in East Africa

a short- South America and the Pacific. With built for communication with Eng- while still retaining the mechani-eraly embodied in all the newest wave station is to be erected at the opening of the Canada-Austra-land. cat strength of a thick filament, types of low-consumption receiving Nairobi. an important advance would be valve, going a long way towards made.

solving the problem of microphonic A fundamental point is that the noise, as well as the other consi- current consumption must be kept derations we have discussed.

research has resulted in the production of fil- ments which give an emission equally as good as the old white heat bright-emitter, at a very much i

THE HONG KONG OPTICAL CO. down, and modern

'Phone 2282.

53, Queen's Road Central.

Printers.

"THE CHINA MAIL," General

Printers. Publishers and Bookbinders,

3a, Wyndham Street. Tel. C. 22.

lower temperature,

4

NO LIMITS OR FRONTIERS.

Of all the boons science has be-

Na Service 2 third route by

the diaphragm If you remove which messages can be relayed The Parle-Bordeaux afternoon through Canada has been added to from a 'phone earpiece it should not be pulled upwards, against the express is now. equipped for resupplement the other two routes magnetism, but should be slid ceiving wireless programmes, and in case of need..

across its supporting ring. In a about sixty pairs of headphones

aldeways direction, across the face of the magnet.

are available for passengers.

Useful Hinta.

::

It is a good plan before cutting

"Fading" Problem. The Beam wireless service to Australla has been most satisfac

"stowed upon us radio is without up threaded rod to screw on Bay tory, as is shown by the steady in-

Accumulators should not be al-

to stand idla for too long, so

We know that as the filament limits and frontiers. By its very that after the cut has been made riad month by month, amounting that a battery which is not in use temperature is increased, so the nature it is International, for no the femoval of the nuts will tend now to a figure which approximates should not only be fully charged- current consumption will go up breadcast programme can be con to straighten out the thread and no less than 9,000,000 words per before it is put aside, but every The difficulties experienc-six, or eight weeks should be par (the very thing we want to avoid), Aned to the country of its origin thus make replacement easy.

od through fading" have been tially discharged through a suit. and it follows the lower the tem- except with the utmost difficulty, perature the filament can be run, Radio is broadcast as the same The masts of the Zeesen Stationsmail and it is expected. that with able resistance, and then recharg

the additional link with Australia od. the leas L.T. current consumption suggests.

are nearly 700 ft. in height.

annum.

FOR SALE.

CHANG TSO LIN'S COMMEMORATIVE STAMPS.

Without aurcharge @ $3; : net With surcharge $8.50 met per complete set of 4 stamps.

GRACA & CO.

Dealers in Postage Stamps, Postcards, Garden Seeds, Toys,

Picture

Books

P. O. Box No. 620. HONG KONG

No. 10, WINDHAM STEERT,

WELLAS LONG AS MAGGIE HAS

MADE UP HER MIND TO GO TO THE SEA-SHORE^IT'LL DO ME NO GOOD; TO ARGUE-BECAUSE IT'LL END UP IN A FIGHT WITH ME THE LOSER SO.

THAT'S THAT-

BRINGING UP FATHER.

1.WISH WE WERE GOIN' TO THE

· MOUNTAINS: BUT I MIGHT AS WELL WISH FOR THE MOONSELLETRY ON ME

BATHIN SUIT-AT LEA ALL HAVE

THIN'

· FÜN

(NOT SO BAD ́AN!

AT-THE SAME [TIME NOT SO

GOOD

NY OTHER- DID YOU SJE FATHER IN HIS BATHING SUIT?:

DIO 1? ILL SAY LOID AND I'VE MACE UP MY MIND W THAT WE ARE

NOT GOING TO} THE SEA SHORE