1924-02-02 — Page 16

HONGKONG TELEGRAPH.

SATURDAY, FEBRUARY

1924

YOUR BEST

INSURANCE AGAINST FIRE

Foamite Firefoam

FURTHERMORE

You are not troubled with constantly recurring expenditure.

The initial outlay is negligible compared with the thousands of dollars you run the risk of losing should a fire break out in your home. Full Particulars From :

The United Asbestos Oriental Agency, Ltd.

2. Queen's Buildings

Tel Central 236

A Really Sensible & Useful

il

Present

STANDARD PORTABLE TYPEWRITER

THE UNDERWOOD

PORTABLE

Sole Agents:-

DODWELL & CO., LTD.

Price $112.50 nett.

'Phone 1030.

RADIO NOTES AND NEWS.

Matter of Microphones.

An

In the course of a recent article," of the other filament are brought Capt. P. P. Eckersley, the chief out independently. The filament engineer of the British Broad- with the joined wires will serve casting Company," writes —– as the plate.

To amateurs, I say, look for After these changes are made microphones that are both sensi-the wires are again soldered to tive and non-resonant Full well the base in such a way that they I know that multivalve amplifiers will not be short-circuited or |for low frequency are expansive touch each other. In fact, it ia =| and unpractical for many of good plan to fill the base of the you. If you want.a'remunera lamp up with gine, or, better still, tive and fascinating line of re-resin, which is a better insulator. search, try the microphone pro This done, the base is again ad- blem. It should be easy to evolve justed in position and held there some compromise, something that with some good grade of glus or lacks the resonant qualities of cement. ordinary commercial microphones With this arrangement to some extra, and which gives ordinary socket can be employ- in return quility unrivalled in the fed, providing a third terminal amateur world. There is a market is supplied. Two terminal are among amateur transmitters for needed for the filament and one' something which will not be so for the plate, for the grid is of the costly as studio microphones, and external type and is placed on the can Tetapproach them in quality, outside of the tube, causing the A last word to all who search | valge to oparate by electron leak- after quality. It is useless to get age through the glass. The grid a microphone that gives the most can be made of copper foil or some wonderful results, which can light form of copper screening. If hear the bei's squeak the foil is thin enough it can be and the elephant's grunt,held to the surface of the glass by and still retain the subtle quality the use of some cement, or a small of the emu's mew (middle C), and piece of copper wire can be bound then tack it on to a control,circuit about the tube. that most marringly distorts its best'effort::

Since all motor-car lamps oper ata on six volts, the standard

I have yet to find a method of radio storage battery and rheostat control other than choke that will can be employed to control the do justice to a "perfect" micro-filament

phone. I paint no finger of scorn DON'T EXPECT TOO MUCH. at any one. I know the difficulties The external grid valve such as and the limitations of the method. just described can be used in To those who want long distance, practically any circuit. However, I bow and say carry on; to those the writer wishes to mention at who want perfect quality, I say this point that the same resulta research among microphones and as those obtained from a standard. then perfect your wireless set for valve cannot be expected. quality considerations alone.

TELEVISION A FACT.

can

It is much more sensitive than These remarks to amateurs are a crystal, but does not compare intended to be put forward in a favourably with valves of stand- constructive spirit. May you beard make nor

they be tuned in to this sentiment." "cascaded" to form amplifiers owing to the fact that it would be most difficult to find a low-i An American inventor, Mr. C. frequency transformer that would F. Jenkins, recently demonstrated match the impedance of the his wireless television system, valve. In fact, the writer has and the full story of his success no idea what the impedance of is given in the Wireless Review. this tube might be, and therefore In his laboratory. Afr. Jenkins could give the prospective builder had a small cinema screen. and no data concerning the construe- people wêti abis by wireless to tion and specifications of such a see him more bis hand about transformer. Therefore, though The editor of our contemporary.such a transformer were who has taken a keen interest instructed, it might be found that television, believes that it will not, the trouble and expense involved he long before people will be able in setting up the outfit would not to see on a small screen in Eng-be worth the candle. land, at 4o'clock in the afternoon. what happened in America at 11 o'clock.

COD-

Nothing definite can be said about the H. T. voltage, for it will be found best to experiment Australian Commonw, alth of a little until the proper voltage ficials in London have received is found. "which will be indicared information that a number of when the signal in the phones However, it amateur radio operators. following becomes loudest.

pre-arranged understanding has been found that something With amateur operators in between fifty and seventy-five America, recently received 12 will be necessary. particularly clear message from If a powerful horseshoe magnet station & KA, of Los Angeles. is about the house it will be advis California, nearly 7,000 miles Table for the experimenter to place away. Many other American it at various points around the and Canadian stations were tube. and some point will be noticeable where heard. including the station 6CFZ. reached

A letter from Australia states increase in signal strength will that a 5 kw. transmitting station be had. The magnet may then is to be erected in Sydney for the be permanently arranged at this purpose of broadcasting This is point. If the magnet is very more than three times the power weak it will not be worth while used by the British broadcasting to try this experiment, since the stations. This is necessary, as results will be bound to be Dega- Australia ik not so thickly tive. If the experimenter desires populated as England. and there- he may make up a number of fore, to provide entertainment all these valves and pick out the best! around cities and towns, greater one, holding the others in reserve. power is required. In these cir- In some cases an exceptionally cumstances a crystal user 50 sensitive bulb will be found, and miles away will be able to hear this 5,000 watt station.

A FIELD FOR RESEARCH.

a

all the trouble taken in preparing

it will be well spent. This is experimenting of a nature that

ELECTRICAL

INSTALLATIONS

Estimates and advice free

SOLE AGENTS FOR-

JOHNSON & PHILLIPS, LTD.

Cable, Transformer and Switchgear Manufacturers. J. & P. wiring system is the only suitable method for this allmate.

THE ELECTRICAL DEPARTMENT THE HONGKONG & SHANGHAI HOTELS, LTB.

SEASONABLE REMEDIES.

75 cents and $1.25 per bottle.

which are both reliable and affective SPECIAL COUCH LINCTUS

COLD & INFLUENZA MIXTURE

$1.00 per bottle IODISED THROAT TABLETS

זי י

60 cents per bottle TO BE OBTAINED ONLY AT

THE COLONIAL DISPENSARY.

14. Queen's Road,

Telephone 1877.

Your Children's Clothes

LUX

will make light work of keeping the children". nicely dressed. Linens. lawns, organdies and batistes can be made to last just as long as the dark, ugly ginghams."

It is so easy to wash the children's clothes in LUX. The thin, white, silky Lux fakes, specially made by our own exclusive process readily dissolve into a rich babbling lather, as harmless to fine fabrics as pure water itself. Just squeeze the creamy suds through and through the little garments, rinse, squeeze our surplus water, and hang to dry. Do not wring or rub. Lur Hands supreme for washing fine clothes. It is sold only in sealed packet-dust-proof!

AGENTS:-

The China Soap Co., Ltd., Shanghai. Hongkong-Tientsis Hanko Teisanfu. Houkden

should satisfy every type of THE HUMAN - ZOO dabbling with something new.

radio fan" who wants to be

SAVING CANADIAN

WILD-LIFE.

A writer in a Home journal draws attention to the possibility of evolving "some form of valve that could be employed for both house illumination and wireless

describes He purposes." simple, yet very interesting-#1- periment of his own.

Sport is so popular in Canada The first thing to do is to that measures have bad to be obtain a two-filament motor-cartaken to prevent the extinction of lamp of standard make. These certain species of birds. In some are the "high-low" lamps that cases, unfortunately, the pre are so arranged that a dim or caution has come too late. The bright flament can be used. Eskimo curlew, the Labrador Such lamps usually retail at duck. the passenger pigeon, and prices ranging from two to three the great auk are reported to be One or two already extinct, while the Lodges. This visit will it is Assistant Grand Secretaries :shillings each. believed. conduce to a fuller rooms for clerks, waiting rooms, should be purchased, and the first whooping crane and the tram- understanding between the general staff clerks office, re-job is to remove the base care-peter swahars becoming in- English-speaking members of the gister room, muniment rooms, fully with a small, sharp pointed creasingly rare. Protection, how- Craft. Masonic recognition was board and committee roomas: instrument. When the base of ever, was not a simple matter,į Lord "Ampthill, Pro-Grand also given to the Grand Lodge of increased accommodation for the the lamp is" worked loose it co-operation being Master, presided over the Quar-Mexico. It was stated that it is Grand Master, Grand Officers, should be carefully pulled off, between Canada and the United

Officers; Past Grand

and the application of a hot States in the case of migratory of the proposed to issue an invitation to and terly Communication

iron will im- birds.

been This has DOW Grand Lodge of English Free-architects to submit designs and group of large rooms for the soldering

the three achieved by the Migratory Birds masons held at Kingsway Hall, plans for the new Masonic Million use of visitors, including a reading mediately release

It will then Convention, which provides in building, in and writing room, a. smoking connecting wires. when the Duke of Connaught Memorial Fund

be seen that the filaments both countries a close and an froom, three conference rooms, & was-nominated Grand Master of competition. England for the 24th year in sue-

FREEMASONS' NEW BUILDING.

Temple to Seat 2,000.

necessary.

The proposed new building will locker room, dressing rooms, are so arranged that either one or open season for game birds, and cession. Reference was made to comprise: a large Temple with bath room,, &c. a library and the other may be used, However, continual protection throughout the forthcoming visit to the seating capacity for 2,000 persons museum, with a strong room: 15 such an arrangement could not be the year for insectivorous birds United States of Sir Alfied with cloar rooms and other ac Lodge and Chapter rooms, with used as a valve, and bence the Bird lovers throughout Censda Robbins, President of the Board commodation, registration hall, seating capacity varying from 30 necessity of removing the base to are now enlisted as honorary of General Purposes, when vestibules, and scrutineers room to 600, all with auto-rooms and change the connections. The two game-keepers, and this corps of be will be the guest of administrative offices, including a candidates' rooms; store rooms wires from one filament are joined voluntary workers is steadily

together, and the other two wires increasing several of the American Grand suite of rooms for the Grand and adjacent to each Lodge room.

Pakila Ladka 64