1924-06-28 — Page 12

Really hard to tell

you just how simple, sprick and delightful a, in to ùn LUN→ that your soft immer gen ments, house, disies, silinderwear, can be washed maxits and rusin vnd fork always ap amined an when neve. For the Jny mather of

■ family-for che, che il teacher, the busines girl, or any "y, for Vort mister, the fine, creamy, aliudani, instant

LUXA

faster in a wambere ask sin cussing anitz garmerdu,

the dainties the d

and inte

back to thuis frut feels

Secondary

Primary

HONGKONG TELEGRAPH.

SATURDAY, JUNE

RADIO NOTES AND NEWS.

Regenerative Three-Circuit Receiver.

Perhaps the most popular re"Tho balf-inch spaco allows room colving set is the Armstrong re for a quartor-inch rod to hold the gonorative three-circuit tunar. Totor in place.

1924. (FEATURE SECTION).

listening-in on his wireloes! apparatus bad" a strange and unpleasant experience."

He has a home-made orystal, receiver, and he was listening during the Children's Hour to the

the room.

►

The principle upon which this On each side of the rotor wind entertainment broadcast from circuit has been designed in that 20 turns of the No. 20 DC. London when there was by which a signal aften detection wiru.

particularly bright flash of light- f "fed hack” upon the grid Wind all coils in same, direening, and ho was hurled aorosa cirouit, thereby increasing its tion. original energy and greatly Connort ono ond of stator of

The sot was on the tablo, and amplifying the weaker signale. the variometers to one end of the tho table-cloth and a nowapapor

This "rogonoration" is produced Į rotor.

anught,alight. When the lad had by means of a tloklar coil or vari. The variometers should be as recovered and had put the fire out ometer in the plate circuit which far apart as possible. The tubojho orystal sot was found to be "throws back" the signal from and the variocoupler cùn beat out of action. the plato to the grid. Aplaced between them. variometer in the grid clroult in The variable condenser can turn sends the amplified signaloither be kept outside the set, or back to the plate and the phonos. [can be attached to the upper loft Following are the paris for sido of the panel above the first, such a sot:

or. grld, variometer. Tho con- noction from the grid variomoter had ligtning arrestors attachod. Neither of the dostroyed sots to the grid condensor and leak Aerial placed 40ft.' high) and thence to the tube socket between these must be as short and direct as mishod.

two seta possible. Make all connections,

One dielectric panel. 8, by 18

inches.

One wood base, 8 by 17-inches, One vario-coupler,

Two variometers.

One 23-plate, or 0005 variables short as possible. The grid condensor.

Lightning also dostroyed u valve wot belonging to Captain| Ansten, of Little Court. In this case it atruok a tree to which, tho aerial was attached.

་ ་

WAS

During thunderstorm it ́in! leak can vary from one to five inadvisable not to listen-in. bo- cause the wireless aerial acts as

One 10025 grid condensor and mag-olns. variable grid loak.

One folim vernier rheostat.

One tube socket.

Ono rotary switch.

Six contact points.

Two switch lover stops. One closed circuit phone Six binding posts.

Operation of this set is extreme- lightning conductor and tho ly dellente. For this reason, if inset may ruinbd.- to say suggested that a copper shield be nothing of possible risks from applied to the back of the panol. fire.

clear of all rods and contact points, The simplest safety dovico is except the centre of the switch to connect the aerial to the earth jack.lever and the ground-binding pout, torminal. In this case the serial A vernier rheostat is called for may be an actual safeguard to a to get the tubo to an exact position | house. just before its oscillation. pojut.

Thin sheet copper for shielding, 8 by 18 inches.

Many people now ili u simplo This is done by turning the switching arrangement to their rheostat until a frying noluo is aerials, by means of which the heard, then turning the vornior latter can be "earthed." back until this is oloarod:

Bus wire for connections. All this, besides the UV200 or C300 tubo, the 6-volt storage A battery, the B battery and phones. This hookup can be heard only on phones. If loud speaker is to be used, two-step audio am- plification would be necessary. In that ovent also, the B battery voltage would have to be in-the variocoupler are then turned creased from 22 1-3 to 45 volts.

SPECIAL WINDINGS,

Then the grid and plato vario. meter dinis can be turned slowly and equally until a whistling sound is hourd. The variable condensor and the socondary of

ONE-TUBE SET.

:

to clear the whistling and bring Quite Sufficient for Needs. out the bondcast programBie, For the varic coupler, tako a For different wavelengths, the piece of thin dialectic tubing 4 primary switch is moved forward inches in diameter and 5 inches for backward from one switch point long, and wind 48 turns of No. to another.

20 D. C. C. wire taking a tap off)

PHONES

at every 8 turns. The secondary

DIAGRAM SHOWING CONNECTIONS IN THE HEGENER. ATIVE RECEIVER.

·

the simple one-tube receiving set Radio fans still dabbling with nood go no further.

Prof. John H. Morecroft, head of the department of olectrical engineering at Columbia Univer-

Radio Engineers and pioneer in this science, gives them oncour- ugoment.

consists of a ball rotor, 31-2 inches| LISTENER-IN STRUCKity, president of the Institute of

BY LIGHTNING.

Set Destroyed..

in diameter. On each side of this wind 18 turns of the same wire.

Both variometers are made exactly alike. Each consists of one Hurled Across Room And "Long distance reception is place of 4-inch tubing 4 inches-

what everyone is reeking just į long, and a rotor 3 1-2 inches in

now," he says,

"But that craza diameter. Wind 20 turns of No. During a brief thunderstorm will soon die down. Broadcaste 20 D.C.C. wire on the tubing, then whigh passed over Buntingfording will resolve itself into more. skip one-half inch and wind 20 (Herts,) recently, a boy named centralized control and local re: more turns of the same wire. Robert Walsingham, who was ception will be the final outcome."

BOVO-LACTIN

The Key of Life.

A PERFECT · INVALID; FOOD" These preparations are now being largely prescribed. Thoy contain all the essentials of a diet idea! in acute 'conditions generally and in post-operative statos:

BECAUSE

They are easily digested and assimilated even in the most asthenlo states.

They possess a high protein and vitamin content

They are most agrooable to the palato.”

Thoy evolve an easily assimilable food for those conditions in whieli it le nocovary to ensure nourishment without bulky rosiduum INVALID BOVO-LACTIN (in powder form):

May, be taken as a powder or it may be mixed with equal quantity of Brandy, sherry or Port. It may be given in Milk.

BOVO-LACTIN ESSENCE

For convalescents, growing childron, athletos in training ota.

BOVO-LACTIN CHOCOLATE

A perfect food" bovorige of high biological value.

Suppliał by :-

MOSSTs. A. S. Watson & Co., Ltd., Quòon's Dir pensary, Colonial Dispensary, The Pharmacy The China Dispengary, The Kowloon Dispensary.

For Inexpensive

and Charming GOWNS

And

Practical Lessons in

dressmaking. please call at

LES ELEGANCES DE PARIS

No. 8 Queen's Road, Central. Ist, Floor.

Tel. No. C.386.

Tel. No. C.386.

Ladies' Fine Fancy

Handker- Chiefs.

$1.00 doz.

BACKMARKET Sale

Results

Extra Bargains

IN

Drapery Dept.

* 27'' High grade Gingham 40 cts. a yd. 36" Fancy Voile - 50 cts, a yd.

· 26" Fancy Organdie 55 cts. a yd. 36" Fancy Sponge cloth $1.00 a yd. 38" Silk Crepe de chine - $1 85 a yd. 36" Silk Georgette Crepe $1.85 a yd 36 White Curtain..

Irdies' Cotton Vests.

For

25 cts, a yd.

of Our

Careful Buying-Your Gain.

Ladies Waterproofs

SALE

Ladies Umbrellas

$ 17.50

Sale at 20% off

Formerly $25.00

SALE

$26.50 Formerly $40.00 Ladies Waterproof Capes

Sale 28.50 Formerly $45,00

Extra Special in Trunks Dept.

Thousands of other Bargains

not advertised.

Gent's Water-

proofs.

Light

Weight.

$10.50 each

Extra Bargains.

IN

$1.45 each Gents' Shirts-Pyjamas

Gent's Underwear B.V.D. Shirts and Drawers

B.V.D. Union Suits

Gauze Athletic Vests

$3.00 Suits

80 cts, each Gent's Hosiery

Silk-Socks-

95 cts. pr. with clox $1.25 pr.

High Grade Fashionable striped shirts

$2.50 each.

Nice Striped Pyjamas

Yee Sang Fat Co.

$5.00 sult

Gent's

Washable Ties,