1931-05-28 — Page 2

HONG KONG DAILY PRESS, THURSDAY, MAY 28, 1931.

AC-SG3 Set

ENTIRELY MAINS OPERATED

PADIO

A sensation in 8 yalvo 'sets, with 1 watt undistorted output; erough power for any moving coil or dynamic loudspeaker. A set that will appeal to you whether you are interested" in perfect quality from the local station or clear reception from distant statione.

Price only

$145.00

Including Mazda Valves (the best British Valves)

Special B ELIMINATOR for any domestic set or made to order for any requirements.

For

perfect reception

use "MAZDA" Valves, large stock newly arrived

RADIO batteries made by new process minimis- ing deterioration "PERTRIX" 160, 100, 80, 45 volts and C. batteries.

Ebonite TROLIT" and Pressed Fibre Fanels cut in any size. Loudspeakers, and various parts are also obtainable.

For further information apply to:-

CANTON TRADING ASSOCIATION, LTD.

CHINA BUILDING (5TH FLOOR). TELEPHONE 24610.

Hear the Golden Voice

FROM THE NEW

ATWATER KENT RADIO

to our

Radio COME

Department and let us demonstrate to you the new features of Atwater Kent Radio. Tone Control.. Quick Vision Dial'... Mastery of everything on the air... and many other vital points that will interest you.

Listen to our Atwater Kent record. Hear how a great orchestra is build up-instrument by instrument----until all parts are blended into Victor Herbert's "Match of the Toys." You will enjoy this treat and feel marvellous. Come in! No obligation.

Decide for Yourself about Tone!

66

FEATURES

EMPRESS OF BRITAIN'S” WIRELESS

DEPARTMENT.

FINEST INSTALLATION AFLOAT.

EXTENSIVE. MARCONI TELEPHONE, TELEGRAPH AND MUSIC REPEATING

EQUIPMENT.

saitable 'voinine controls, are being installed in private suites.

A WONDERFUL S.C.

The latest addition

the

Accommodation.

The provision of this elaborato Mullard range of receiving valves wireless installation naturally calls"

is the type 4.V.B., a screened-grid-

for extensive: nccommodation so that I valve for use with A.C. mains. It is of the indirectly-heated type, it can be utilised in the must efficient manner. Four large cabins that is. it has a heater element which raises the temperature of the are devoted" exclusively to the wire- Jess equipment. The long and short cathode by conduction through an

insulating material. · · provide brondeast programmes na wave telegraph installations and a they become available; and gramo-brondenst receiver are contained in phone records wil relieve the orchestra" when necessary and Bup- ply the latest dance tunes and other popular items, ... -

"

wavelength best suited to the atmos pheric conditions of the moment, and is capable of communicating

a large cabin, mensuring 14 feet by directly with any country' offering suitable terminal facilities, and of

Ja feet, situated just aft of the making use of the land line or

bridge. Two other cabing on the wireless telephone connections from The main amplifier, wireless re- top deck are devoted to the tele such countries. In this way: Lon-ceiver, gramophone with a doubie phone apparatus.. The receiving don is the connecting link between turntable, and a motor-generator, cabin, 12 feet by 10 feet, in between ships and practically every tale

ara accommodated in the Band phone subscriber in Europe, and. Repenter rooni, and microphone the first and second funnels, and similarly, New York provides a

points aro installed. in the Ball, the transmitting cabin, 22 feet by 13 room, Lounge and First-Class Din-feet, between the second and third ing saloon. Announcements

funnels. An elaborate, perial sys- also lie made through a microphone

tem is necessary for the various in- stallations, and this is suitably arraiged between the mata and also from the fore and mainmast heads.

1 in filing, that the finest ship in the world to be commissioned in 193) should carry the most complete wireless equipment ever installed in any ship, and the Marconi in stallation of the Empress of Britain inay be thus described. It also affords a striking demonstration of the remarkably high standard that has been attained in marine wire less equipment. It includes tale graph transmitters and receivers for long and short wavelengths; telephone service for Canada, the short-wave duplex telephone up | United States, Mexico and Cuba. paratus with a worldwide radius; lifebont wirelam sets; a wireiro direction finder, and, although not strictly speaking wireless equip ment, a hand repeater and music player which will provide enter Lainment of exceptionally good quality.

Telegraph Transmission and Reception..

A 2-kilowalt valve transmitter for long-wave telegraph transmission is augmented by a 2-kilowatt short wave installation, and selectiva receivers are installed to ensure good reception over the complete band of wavelengths of service to the skin. By reason of the phenu ine of the reflection of wireless waves from the upper atmosphere, short-wave transmitters are capabla

of a world-wide range and the short-wave installation in the Em press of Britain will enable com- munication to be maintained over long distances with stations out of range of the long-wave transmitter. This will facilitate the exchange of telegramis directly with the country of origin or destination, thus afford ing considerable econunier,

Emergency and lifeboat equip ment is supplied, embadying up-to- date idens for efficient working, and complying with all national regulations.

A Marconi Direction Finder will facilitate the work of the naviga tors, and the latest type with the fixed-frame aerial system has been installed. Bearings with this in- strument can be either true or re lative to the ship's head, and a

fitted with gyro-repeater,

the direction Ander, adds to the sim- plicity of taking trus bearings by giving a direct reading from the compass dial.

Short Wave Telephone Equipment,

Hand Repeater and Music Player.

Just as telephony is an accepted factor in everyday life, su gond music is being more and, more ap preciated and demanded owing to its popularisation by broadcasting. Marconi Band Repeater equipment in the Empress of Britain will pro vide entertainment in all parts of the ship. It includes eleven large loudspeakers for the public rooms and decks, and two, small loud- speakers for Suites de Laze

In order to present a variety of programmes, three alternatives are povided as Bources of supply. Vierations can be " plugged in in selected places to relay the ship's orchestra, concerts, and other evente

"

in the Band Repenter room.

Harmonious Decoration.

can

The characteristics of the 5.4.V.B. are as follows: Heater voltage, 4;

healer current, 1 amp,; anode im- pedince, 237,000 ohms; amplifica- tion factor, 100; mutual con- duetanen, 3.3. The valve is design. el to operate with, a maximum

anode voltage of 200.

A grid bins of volt is recorn- mended. This latest Mullard pro- duct is extraordinarily efficient.. Its characteristics are wonderful, and there is, of course, nothing like it in the form at

a battery equivalent.

An amplification factor of 900 tấ

In order to harmonise with their surroundings in the public rooms of the ship, the loudspeakers are ¦ A special band room near the first-enormous and the mutual conduc- mounted in the structre of the shop class dining saloon, contains the tange of 8.5 very clearly indientes,

"goodness." It is, in fact, about, seven times as good as what would'

have been regarded, as a first-class,

.. not so very long age.

various firms responsible for the gramophone turntables, control ap- decorations, and are placed in the Ballroom, First-Class Lounge, paratna and generatore necessary First-Class Smoke Room, First for the Band Repeater equipment Class Dining Galoon, Swimming and accommodation for a good Bath

We tested the 9.4.V.B. in a one- Tourist Lounge, Tourist Dining Saloon, Third-Class Counge

selection of records and spare parts.

stego H.F. amplifier in the correct The Marconi Direction Finder is conditions as to voltages, etc., and and the Third-Class Dining Saloon. In each case a local control is con installed in the Chart Room where using a high impedance intervalve

volume from the loadspeaker to be veniently mounted to allow the it is most convenient for the navi-coupling as advised (in this case niljusted to a comfortable strength, Hating officers.

of interest to the whole ship; nor to be switched off if not rapired, mecial type of wireless receiver will Two small loudspeakers, also with 1

HAVE YOU HEARD THESE?

Hore

are

lists of long-wave and short-wave stations which should be picked up by anyone

in Hong Kong who has a mode- ṛately good set suitable for re- ceiving such signals. Success in picking up these stations also depends very largely upon lay- ourable atmosphérie conditions. Readers are invited to add to this list should they succeed in picking up any station not in › cluded in either of these lisin.

LONG-WAVE STATIONS.

Wave. Jength

Call Kilo- (Metres) Station Sign cyclo

360 Manila

K.Z.I.B. 1,153 277 Shanghai K.S.M.S. 1,083 345 Tokyo J.O.A.K. 670 350 Hiroshima J.O.F.K. 335 Hong Kong Z.B.W. 846 357.1 Bombay

341 Sapporo 354 Keijo 370 Nagoya 370.4 Calcutta

850

V.U.B. 8.10. J.O.I.K. 630 J.O.D.K. 890 J.O.C.K. 810 V.U.C.. 500.0

790 J.O.H.K, 770 J.Q.A.K. 760 J.O.B.K. 750 C.M.B. The K.Z.R.M.

350 Kumamoto J.O.G.K.

300 Sendai

303 Dairen

400 Osaka

410 Canton 480 Manila

SHORT-WAVE STATIONS,

KILO

CTCLIA

TIME (HONG KONG)

OF WORKING

4,484 Mon., Wod & Fri., 0 p... & 2 a,m,

4,990 8-10 p.m.

6,201 Not regular

6,000 Tuo. Thun, Sat., 8 p.m.

6,890 Bunday midnight

7,142 Daily 4.80 p.m. & 11 p.m.

7,810 Not regular"

7,780 Daily 1 p.m.

8,106 Tues. & Fri., 0 p.m.-1 ne.

9,501 Not regular

Installation,

The installation work of the wire less telephone set was carried out by engineers of Margoni's Wireless Telegraph Co., Ltd. the wireless telegraph equipment by British Wireless Marine Service, and the

a particularly efficient, tuned anode scheme). Considerable amplification was achieved, and undoubtedly the results were superior to those nor- imally given by two stages of three-

electrode H.F. amplification.

The one stage was entirely suff. cient for any ordinary purposes.. The S.4. V.B. is, in view of its im pedance, H.T. volts, etc., a welcome innovation. And Mullards could

Band Repeater equipment hy the certainly call; a halt and find no shipbuilders, all on behalf of the occasion to feel dissatisfied with the progress they have made in A.C. Mareani International Marine Com-valve design for a very long time munication Co., Ltd.

to come.—¿imateur Wirefran.

The

EVERYTHING (9.&C.) ELECTRICAL

your guaranicn

FOR THE HOME WITH ELECTRICITY

HOUSEHOLD

"Magnet

STATION

CALL BION

67.86

Dobinte. (Germany),

A.F.K.

60.19 '88.7 60,

Khabarovek (Russia)

4.97.-'.

Напеди

A.G.J.

Mosco

REN.

48.6

Ramo

IMA.

tho

12.

Forth

6.A.G.

41.3

Singapore

| V.8,1:A.E.

38.8

Kootwijk (Holland)

P.C.L.

37.

Bangkok (Yism)

HSAP.J.

82.5 8ydney

2.B.L

9.230 Not regular

21.56 Melbourne

3.1.0,

31.48 Schenectady

W:2X.A.F

9,630 Daily 7.13%

81.28 Sydney

Nairobi (Kenya) AL 228.6 Sydney

Bandoung

3.F.C.

9,800 Not regular

7.L.0.

0,677 Midnight daily

2.ALE. PLI

10.620 Not regular

11,020 Midnight-8 s.m, daily

11,781 7.30 p.m. & Bam. daily, except

Saturday and Sunday

KJ.X.R.

12,240 Nightly,

W.2.3.0. PLG.

12,050) « Alm. Wadi, Fri., Eat,

10,102 Daily 6.80 pan. to midnight 18,204 Dally 7 pm

frons Kettles Toasters,

Cleaners Fans Firos,

Washing Machines

Cookers Grillers,

Appliances for the

The outstanding section of the wireless equipment is, of course, the short-wave telephone installation. The telephone has becoine an in- tegral part of everyday life, for business, social and domestic affaire,. and its extension by wireless" to shipping is as inevitable ne linking of countries and continents. Marchese Marconi demonstrated some years ago that technieni difficulties had been overcome, and that a reliable and flexible wireless telephone service for ship was available; and since that time, the 27.8. service has steadily increm in. 26,53 | Chelmsford (England) | 6,5.W." popularity in the ships equipped 245 with the necessary apparatus: A 29.35 Schenectady

18.88 Bandoeng refincinent in the Empress of

18.4 Kootwijk (Holland). PC.L. Britain equipment, is the ability to 17.4

Bandoong

P.LF.. 10.0

Bangkok

18.1.P.J. speak from the ordinary cabin

10.8

P.C.K. Kootwijk (Holland) telephones which are connected to

P.LE. 15,74 | Bandoeng 15.5 Naney (France) the wireless telephone through the 13.93 Fittaburg

THE SINCERE Co., LTD. ship's manual switchboard, so that

SOLE DISTRIBUTORS.:

the telephone service on the ship is equally as convenient as that on shore. The apparatur itself, is ied signed for quick adjustment to the

31.30 Eindhoven (folland) PC.J.

Manila

W.8.X.K.

0,020 Fri, 2 min, Ɛst, 3 n.m, & 10a.m.

17,290 Dally 8 p.m. to midnight

17,751 Sundays 7pm & midnight

|18,404 | Each afternoon:

19,220 Daily 6.30

p..

19,861 Dally 3 w

21,540 Not regular

[Allowance must be made for " summertime" in most Ru pean countries, which is one hour ahead of trus time.]

An

example from the complete range of Magnet Household Electric Appliances

Toilet eta

MADE IN ENGLAND &»' THE GENERAL ELECTRIC

CO. LTD

Sehr by all leading Electrical

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ELECTRIC

PLIANCES

Magnet

Pedestal Heater Supplied with a yılk. flemble cord and B,C, adaptor