HONGKONG TELEGRAPH;
WHY LET THAT COLD TROUBLE YOU?
When you can obtain spoody relief by taking PHOSPHO-QUININE TABLETS SIMPLE-SAFE ---RELIABLE
THE
Obtainable only at
COLONIAL DISPENSARY.
14, Quoon's Road.
Telephone C. 1877.
HONGKONG HARDWARE CO.
"TAI LEE CHAN."
FM 125 1
METAL GOODS
A
HARRONG
119 Jervois Street
Tal. No. 0. 1993:
LUX
It only takes a few minutes to wash your silk blouse, your silk stockings, underwear or any- thing dainty and "special"—if you yae LUX
The thin, white, silky Lux flakes, which are made by our own exclusive process, dissolve instand into a bubbling lather that is as harmlera as pure water itself. The lather gently squeered through the fine fabrics quickly loosens the dirt and a few rinsinge make the garments beautifully clean.
Lux stands unrivalled for washing silk and other fine gatments.
Lur is sold only in sealed packets-dust-proof!
AGENTS:-
The China Soap Co., Ltd., Shanghai-Hongkong-Tientsin Hankow-Tsinantu-Moukden
THE AUTOMATIC
SATURDAY, FEBRUARY 28, 1925. (FEATURE SECTION).
RADIO NOTES AND NEWS,
Macao Enthusiast Describes His Receiver.
EXCELLENT RESULTS OVER LONG DISTANCE.
round
mounting. The following colla should always be in hand (which may be of duolateral, honeycomb or Burnadopt):-25 turns, 50
WHAT IS " RUBBISH ?".
worth whilo for the country to prosorve a good deal of what raight be olassed as rubbish because one cannot forosoo all
Dossibly contain something of
turns, 100 turns, and larger if it British Museum Cannot Answer, the needs, and because it may
lis dosirod to have a lenger rango of wave lengths, as with a re- ceiver of this typo, it can be used:
whore
Tuo Times has been calling | Impatut ce that may be wanted." Under the Copyright Act the most officiontly as a univeraal jattention to the plight of the 13ritish Musoum is bound to take tho in every publication in the very widest sense of the term, and the
are requirod' to deliver all kinds view is hold that if publishers of printed matter there is a cor
rocolver for all wave longtha from 100 to 25000 motros,
The variable con vousor for the
Buch as
wall of the country to store those publications and mako thom accossible.
British Museum. Wo have on sovoral occasiona
pressure on space is largely due described the Bae results obtained, receiver will not occlllate below I call it "X" over preat distances, by the 200 molre waves. clever radi onthusiast at Macao, coil; because after making about antennd should be of .001 infd. to the enormous accumulation Mr. J. da Rocha Saraiva. To-day, a dozen of thom, 1 found on The size of the coil to be used in not only of books and news we are able to give Mr. Saraiva's would work, and this is made of the antenna circuit is important papers, but of printed matter of responding obligation on the part description of his receiving sot, 50 turns of No. 24 dec wire, wound to note, as its best value depends various kinds.
on the fundamental wave length
diarios, household account books, as well as a skotch which ho han in jumble fashion on a kindly prepared for the benefit of form (a ginus tumbler will also of the antenna used." our renders who are wireless do) having 2 inches in diam from Kubo, Shanghai, Manila or advertisements, Christmas and For broadcasting reception school forms and registors, trade
AN OLD BILL.. Nearly half a contury ago the birthday cards, religious tracte, Trustoon promoted a Bill in single-sheet ballads and hymns, Parliament to enable them "to On the Secondary 1 of 50 turns children's tay books, and packets ally of no value and absolutely destroy natter which was practic-
uselens," But so keon was the con-
writes.
coil the
of gamas.
the Bill was withdrawn, and any
enthusiasts. Ho
from After winding, Merao as follows:-
is taken out and a piece of string Macao, the following colle should "Namerous requests have is passed around it and ties tight-be used :—
On the Primary 1 of 25 turns been made to me recently forly, to keep it always stiff and detuils ate., of the receivar I am in a round shape. The name of
On the Tioklor 1 of 25 or 50 Being at present in the reception i Xis well given to this coil, of short wavo wireless trana-because my Wongant at
first turns.
But if interested on reception į Much of this class of printed troversy the proposul aroused that mission. But, as most amateurs would not oscillate below 60 of Hongkong as well as those metres waves, and i could not of Manila amatours' broadcasting over here are more interested discover the reasou. I took the such as Elzar, Jiminez, or of mattor may seem to be rubbish, similar attempt, wore it to be with the reception of music, whole thing to pieces, shortened Maran codes from others, a coil but the broad view taken in made, to solve the problem of of 25 turns should be used on the authoritativo quarters in that it in pressure by the process of wooding will in this first article deal only all the connections, and wound a with my broadcasting receiver, few large coils of small self-secondary instead of 50.
Another important romark on vory difficult to say what is rub-out would, it is thought, meet the
Pame lato again to-day, kooping for a subsequent article capacity according to theory the choke coil of the Wongant is blish and what in not. From time my notes on short wavar.
still it would not esclllate. I put that it should be placed in Auch to time there are requests for the Besides, there are other waya My receiver is a "Weagant "the theory aside and slightly modified by me to be several coils in jumble fashion Position that it will not have any most unlikely things, and it is of dealing with the problem. inductivo relation with the other felt that there in a great deal to Though the repository at Hondon adapted for vory short wavor, and and tried again, I can
any, after much exper-surprise it started to exciliato. Icoils or condensers in the circuit be said for the view that there is fall, there is space still th ience, that this circuit is one of choso unto of the most propen whatsoever, and ita loads should should be one place where every basement of the new wing at the class of printed matter can be Musoum which was finished in the best (or the best) for wireless value and noted that with thir be as short as possible.
THE AMPLIFIER.
kopt, whether it appears to be | 1914 for nowapdpora and booke, telegraphy ur telephony. To coil it would even oscillato on
The Audio Frequency Circuit rubbish or not. Indood, to quote and thero has beonsome extension De 20 metres has nothing unusuel, and I re-the words of one authority, "it is of the hook stack round the iron
prove its efficiency, it is enough waves as chert
to say that my friend Mr. Jose: Chaven, using it with a detector. vaiva only. receives clear music from Kobe and Shanghai.
The modifications introdured in the eircuit, for adapting it to my necessition, consist in the insur- tion of the condensers in shant with the batteries and in placing! the choke coil in series with high tonsion supply.
For the reception of broadcant- ing, the circuit is slightly altered, for the large fixed condensers which shunt the "A" and "B"
I batteries are not necoBARTY.
They are necessary, bowovor, when these two batteries aro placed far away from the receiver bocause, in this case, they serve to prevent the high frequency current from Crossing those batteries, which are always of high resistance, especially the "B" battery. When theso con- donaers are used, they shouldi I have at least a capacity of 1 to
2 m.f.d.
In my case it is absolutely necessary, as my plate battery- is about 60 metres away from my receiver, and that of the filament! about a matru or so.
The choko coil, which is be- tween the plato of the dotector valve and the phones jack or the primary of the transformer, is absolutely necessary, as it sorves to leolate the low frequency circuit from that of the high frequency, and without it tho
No Up-to-Date Building is complete without its
Express' Lifts
FLOOR-LEVELLING DEVICE CAN BE FITTED
TO LIFTS WITH PUSH BUTTON CONTROL, DUAL CONTROL,
CAR SWITCH CONTROL.
ESTIMATES FREE
EVERY LIFT MADE BY THE
EXPRESS LIFT CO.
13 FULLY GUARANTEED BY
THE GENERAL ELECTRIC CO.
OF CHINA
Queen's
Buildings,
Hongkong.
100000000005
*001
wound
atid to my
CHOKE
L 2.
L. J
2 MEG,
SO TURNS
CI *0003
C2 'C005
*00025
ималая
ГИ. ЗАСК
Hora is another instance of ex-commend for the first stago a parience defesting theory 1 transformor of 5 to 1 ratio, and Let us now turn to the brond- for tho recond atage, one of 3 to casting receiver again, as tech- ratio (that is if two stages are nicalition aro alwaya tirosome, wanted for loudspeaker recep- and the manner of how it works tion).
will not be of interest to The primary of the lat. trans-
a
majority of the roadors, excopt former alea can be shunted by a to obtain results without much fixed condenser of 001 mfd.| discussion.
which I advise. for clearer music,
7 5.1
C4
PH. JACK
library which surrounds the reading-roon. This axtonsion can be continued if the money is forthcoming, and it would relieve the needs of the department for some little time. Something more than this, no doubt, must also be contemplated, but nothing on a very large scalo in yet errential, and there is reason to hope that the Treasury will manage to do what is required.
Nor must it be supporod that the state of congestion at the British Museum 18 woreo than at somo other places, Plana for ሲ much-needed ex: · tension of the Natural History Museum wero contemplated be- [fore the war, and aro still hung up; only part of the Science Museum is hoing built; and thero » tuo War Museum which is vóry crowded. The Treasury havo den sympatlictio in all those ouses and others, but the country has not since the war 'born, able afford the expenditure on museusis that is really necessary. It has been ho 2d, and the hope remains, that some private bene- factor will ronder that valuable sorvico to the country that the country cannot render to itself.
10
Whiteaway Laidlaw & Co., Ltd.
OUR NEW STOCKS OF SUIT CASES, WARD- ROBE TRUNKS CABIN TRUNKS, Etc. HAVE JUST ARRIVED, AND WE CAN SUPPLY
Soiled
Linen
TIP FOR HONGKONG FANS. For fino music and also to pro The variable condensers of the long the life of the "B" battery. secondary and the tickler coitsla "C" battery may be used, by can bo of 23 plates or of .0005(having its positive connected to infd, approximately. An import-the negativo of the "A" battory. ¡ ant detail to be remembered when and its nogative to the grids.
Ifj Bags connecting these condensers is this "C" battery is unobtainable,
from to have their rotors connected tala 3-coll flash light battery or any
batteries connected in $6.50 the filament and negative lead of other the "B" battery.
saries, will answer the purpose cach.
With
I would also advise the use of woll.
a smaller condenser on the secon
The best way to mount the
dary, for it is well-known different component parts of the Bra's
ת
» Everything
English
Leather Bug and
that
Trunk
Straps
from
90 cis.
10
principle in wireless tolography, weagant is to arrange the three Locks TRAVEL Necessitates
$8.05
each.
NEVERBRAKE WARDROBE TRUNKS REGULATION CABIN SIZE. EVERY TRUNK FULLY
GUARANTEED:-PRICES RANGING FROM $89.50 to $250.00
FIBRE CABIN TRUNKS INDESTRUCTABLE
that when the ratio of inductance condensora on a panel of 18" Locks
The aorial condenser increases to capacity, the signals X 12." become stronger, becauso alon the loft, the secondary can- higher potential is applied to the donser in the contro, and the grid of the valve or valvos. But tickler condensor on the right, in Hongkong, there may be a lot The tri-coil mounting is on the IN of local interferences, and seloc-loft corner of the panel with the tivity would be novossary. In knobs polow. With this arrange. this case, I would suggost the ment it becomes a very comfort- contrary, by increasing the ratio able position to the operator of capacity to inductance, or in when tuning-in, as it sorvos other words, uno a condonserto eliminate a lot of body capacity larger than .00025 mfd. on the between the hands of the operator COVERED WITH BROWN OR GREEN CANVAS FITTED secondary.
The best of all is to have one of the oondensers, placo the of .00025 mfd. instead of .0005 mfd. rheostats, jacka, oto. An each because this circuit is one of the amateur has his own and best most for the most) solectivo that way to arrange and mount the I know of.
different parts for his home-made) With a smaller condenser, receiver, I will leave this to their much loudor will be the rocoption own discretion. from Kobo, Shanghai and Manila: guaranteed.
and the coils. Under the dials)
Tho tuning in very oney. As Foon as the "carrier wave"
or
WIH NICKLE PLATED ENGLISH LEVER LOCKS $39.50 to $85.00 each,
FIBRE SUIT CASES From $12.50 each.
squeal" is heard, reduce the ENGLISH LEATHER SUIT CASES HAND MADE
This socondary condonger. which is rather critical, should capacity of the tick for condenser bo aquipped with a vornior for by a slight turn of the dial, until; very accurato adjustment. My the oscillations coaso; & little vornior is very efficient and adjustinont on the secondary con-
touch on
the choap, and cost me only 15 cts.ongor, and a
at San Kwong. If anyone likes antenna condenser for louder
THE MOST DURABLE CA E OBTAINABLE $32.50 $39.50 $45.00 $49.50 & $50.00 each.
ALSO A LARGE VARIETY OF :-
to soo it, please come to the signals, and then the music will ATTACHE cases, LADIE'S HAT BOXES, STEEL wiralous station at D. Maria, flow in, to the pleasure and do. AIRTIGHT TRUNKS, TRAVELLING RUGS, Etc. Macao, and I will ho very glad fight of the oporator, his family,
to show it. The grid leak and and friends.
condonsor are of the value in. To my frlands who are interest- dicated by the makers of the od in the racaption of very short! valvos,
waves, I will ask them to kindly The threo tuning coils are wait for my second article whiobi mounted on the usual three-coil-is now in preparation.
FIRST FLOOR SHOWROOMS.
WHITEAWAY'S.
Page 10Page 11