1932-10-13 — Page 2

Page

HONG KONG DAILY PRESS, THURSDAY, OCTOBER 13, 1932.

:

RADIO ON THE RAILWAYS

A NEW ERA IN. TRAVELLING

A new era in train travelling was recently inaugurated when a Lon- don to Edinburgh express was pro- vided with special equipment,, con-

RADIO

ELIMINATING NOISE FROM RADIO

NEW ANTENNA FILTER SYSTEM

BY VOLNEY D. HURD

Assuming perfect radio programs Misting radio receiving and from broadcasting stations, there

of

FEATURES

ORCHESTRA

CONDUCTED.

FROM AFAR

electric light line either inside outside the house, and the noise would be stopped. But it is not quite that simple. The fruits of the autetnu must be gathered and' brought into the set. This means a lead-in and the lead-in is just more | NEW TELEVISION PROCESS antenna as far as the set is con- cerned. It comes right into the 30- fout area and the noises are all in. the set again. Of course, one could build a platform above the roof some 40 feet and put the set up

to provide passengers with enter must affect. 93 per cent of the tages,

IN OPERATION

Sight and sound on one

musicians enabled them to follow

SECRETS OF "NOISES

OFF

SQUEEZED SPONGE AS BEATING HEART

LONDON, Sept. 15. There is one large room at Broad. caating House which has been fitted up with a hundred ingenious de

In that room a tall, blond young

But every item of that "junk"

wave length is the latest development in television, according to a report vices to "kid" the listener. Off. published in the current issue of;

cially it is Stadio OD; really it is gramophone reproducing apparatus is still a marked nuisance which there, but that has its disadva Television. Hitherto separate wave! the Department of Deceit, tainment and music throughout the sets of any country. That is man. The next step was to keep the lands have been required for the

transmission, and in consequence ! journey.

made static. To try to enjoy music value of the 30-foot antenne place two receivers, one for vision and gentleman, with an instinet for mischief, nauufactures every, con- The carriages had been wired with only to hear a steady buzz, a sharpinent and still get music, into the

the other for sound. Recently, how- points above, the heads of the pas-crack and often a flickering rear, wet. This was achieved by the use ever, American engineers have, it is ceivable kind of noise from a senger, and plug-in telephones is impossible. Yet that is a regular of a shielded lead-in. The regular stated, suceeded in eliminating synthetic kiss to an iceberg crash-

fond-in wire is surrounded by af the second receiver, were obtainable from an attendant condition in our electrified era.

The new xystem has proved praeing a liner. The room itself looks The few who escape are probably metallic covering which is ground-tical after several weeks of opera- like a combination of an operating for a small charge. Se successful was the innovation that it now farmers in remote places where oiled and which therefore preventa tion, and at the first public demon- theatre, a gymnasium and a junk forms a regular feature of the dai tamps are still used. Our good any picking up of interference by stration in New York it was used

to conduct an orchestra, Television shop. ly run, a definite programme being friend electricity, while saving in the lead-in, giving the pickup of receivers set up in front of the mapped out for each journey. Ar-bour, bringing us light and keeping the clear antenna only to the sol. rangements are made to use either our radio capalile of constant opera-

But still our problem was not reproducer or tion, is also the cause of most of halved. Any such shielding means The conventional 100 kilocycle gramophone

wideband is used to carry sight radio nccording to the biondoast the noises which spoil radio recep. a loss of signal energy. This Pro and sound simultaneously on what

Electric motors, dial tele-blem was finally met by the design transmissions and the physical timu. conditions of a particular paru of phones, switches and the thousand of a transforming unit, attached is known as the "double molula

between the tend-in and the anter, tion" aystern. the journey,

and one other things which ope atena, which steps up the signala,

the loss electrically, are all sending forth compensating disturbances which the sensitive strength due to the shielding.

Now we can breathe easily and radio set brings in scrambled up it down to quiet radio? Not quite with the programmes we want to yet. There is one more thing to be

Honn. The electric set is connected! hear.

to the house lighting lines, and this connection is the nicest sort of back door for the baffled static to find a way in, having been kept out of the front door by the long shielded corridor of the lend-in.

the

to

•

*

If a bow for unappreciated vision in radio is due anyone, it is to Mr. Tobe Deutschmann, who will be remeinbered by the old-time sat buillers as a maker of conden-

mann

*

*

for

of

the conductor's baton a quarter of

a inile away.

1

is an essential ingredient for con- eocting the background and de- scriptive noises which radio-listen- ers hear when they tune-in to a play or sketch,

In one corner is a wooden bath which provided the "effect" to and once in' can be forgotten. The Leonard Heary's funny bathroom results are amazingly good, giving skit of a few months ago. It is from so to so per cent, elimination; used for manufacturing aquatic sounds, from a morning dip to a storm at sea. On one side is fitted

in even difficult locations,

With the filterizer installed all these noises except the first are completely eliminated. And even the first has been reduced down to suck a whispered purring that un- less one were looking for it especial- So a line filteretta is used bely it would not be noticed. Final. tween the set and the floor plug ly, as a complete, test, n Vacuum connection. This completes the fil cleaner, a fine, roar-maker, was terizing, shutting out any efforts of turned on two feet from the set with noises to got in that way. Thus, the set turned up to full intensity, with the antenna, lead-in ecupling and it could not he heard at all. unit, the shielded lead-in and the house-line filter, we really have a now type of radio signal pickup system.

The device is very easy to install (Continued on nezi column, j

small rowlock, into which is placed a miniature oar for rowing

scones.

Fruit Salts and Fried Eggs, The tall genius of this studio is continually inventing new acts of deceit. The clamour of the vailway Here then is a boon to radio lis. station which you hear on your tenors. It is good to know after 10 loud-apenker is, to him, a thing of years of listening to notes and roller skater, whistles fixed to noises, all mixed up, that at Inst we are going to have a winter of quiet, peaceful radio reception.

HAVE YOU HEARD THESE?

Radio interference, the greatest buglear hitherto associated with mdio on truins, has been overcome after exhaustive tests by the cm ployment of filters and smoothing gircuits, and, of course, to great Regular or natural static is sel attention to detail. Interference dom the real disturber, only com on this type of installation je due ing in when extreme distance is be- numerous causes, the chief of ing attempted or a local thunder which are noises due to the train storm nears or is in progress. Thus lighting generator on the vehicle in our static problem narrows down to which the receiving apparatus in man-made interferice. installed; interference from genera- · Tackling such a problem, we tors in adjacent vehicles; and di- naturally think of going to the teet pickup on the aerial due to source. And working on the source radiation from telegraph and tele has been very successful as far as phone lines, track signals, etc, it went. But to try to find all the

in noise-making apparatus

the running parallel with the train.

The first two problems were large. neighbourhood and then to try to ly overcome by attention to brush stop it in a huge problem gear, and the fitting of smoothing devices on the offending machines, whereas the last necessitated n ape. cial aerial and the design of an input circuit to the receiver so as to give minimum abock excitation.

Owing to the limitations of the core. Six years ago Mr. Deutsch- saw the coming neod of loading gange the effective height of the aerial is extremely small, and man-made static suppression and Ixcause of interference troubles its started to work along these lines. length must also be small, it senai. The rest of the industry just sail. tive set was therefore found to be necessary. The type actually em ployed is a modified version of the Gecophone BC. 31-40 A.C. Mains Receiver, which incorporates two high frojuency stages, a powerful grid detector and

a super power triode output valve.

Energy for driving the appara any profits the limited sales of that tus, which was installed by the apparatus could produce-sales not limited for lack of need but for G.E.C., in conjunction with the London North Eastern Railway, is lack of public appreciation of the derived from the train lighting way to meet this need. battery. Obviously, this is of a fluctuating nature and special pre- persist and the culmination of aix cautions have to be taken to stabi- years' work has just been anoue lize the AC output derived from-ed_in_the_achievement of the goal a rotary transformer driven by of any sufferer from man-made 67.86

static interference a device that 56.7 this train.

Two receivers are now fitted in can be attached to the set and cut 50,

out man made noises from all the Scottish Express and these are mounted in a specially sprung rack cources, to overcome excessive vibration. This new device is called a fil-89.8 The switching panel adopted allows terizer," but it is really a filtering 35,3 one receiver to be tuned whilst the system rather than a small device 31.49 other is in operation. The auto; or attachment. Like Columbus and 81.20 matic' gramophone turntable instal. the egg, the method of achieving 19 led allows one hour's continuous this result is relatively simple esce performance, without attention. The you know how.

.

ed at this, to them, waste of time.

Ja plugged away and gradually worked out a line of filters which would stop most of the noise from most devices. His work must be considered philanthropic, for the cost of research in a brand new ling like that more than ate ùp

Rewards do come to, those who

•

Here are lists of long-waYO and short-wave stations which should be picked up by anyone in Hong Kong who has a mode- rately good set multable for ro ceiving such signals. Success in plaking up these stations also depends very largely upon fav. ourable atmospheric conditions, Roaders are invited to add të this list should they succeed in picking up any station not in .cluded in either of these lista.

43.8

LONG-WAVE STATIONS.

cylinders of compressed air, and the banging together of two nails.

The wind in the trees is the shuffling about of torn paper in a bowler hat. The appetising sizzle of eggs and bacon being fried is the pouring of fruit salts into a glass of water. Approaching footsteps WaYO

are silver paper scratched with a length

Kilo- Call (Metres) Station Sign cyclo piece of rubber. The sound of a 900 Manila K.Z.I.B. 1,153 beating heart is the squeezing of a 277. Shanghai

K.S.M.S. 1,083

sponge. The crash of a liner on 345 Tokyo J.O.A.K. 870 an iceberg is the crumpling of an 353 Hiroshima J.O.F.K. 850

empty matchbox. B48 355 Hong Kong 'Z.B.W. V.U.B. 357.1 Bombay

840 J.O.L.K. 830 J.O.D.K. J.O.C.K. 810 V.U.C 800.9 380 Kumamoto J.O.G.K. 790 290 Sendai J.O.I.K. 770 *60 . J.Q.A.K.

J.O.B.K. 760 C.M.B. 739 K.Z.R.M. 623

361 Sapporo

366 Keijo

370 Nagoya 370.4 Calcutta

395 Dairen

400 Osaka 410 Canton 450 Manila

SHORT-WAVE STATIONS..

STATION

QALL BIOM

6.4.G. V.8.1.4.B. P.C.L

USAPJ,

KILO

CTCZZA

Ts (Hoa Kona)

OF. WORKING

R20

TO-DAY'S WIRELESS

PROGRAMME

BROADCAST BY Z.B.W ON 355 METRES.

t

11 to 11.30 am.-Stock quotations. 11,30 am.--Chinese programme, 19.30 p.m.-European programme

of Columbin records.

1

p.m.-Local time and weather

report.

1.30 pm-Rugby Press news, etc.

2 p.m.-Close down.

5 to 8 p.m.-European programme,

port..

8-Local time and weather ro-

8.03 to 10.30 p.m.-Chinese Studio

Concert,

·10.30 p.m.--Hugby midday Press,

news.

10.38 p.m.-Close down,

All records in the above. Euro pean programmes are supplied by Mossre. Anderson-Music Co.

REMOVAL SALE.

5 to 0 p.m.--A relay of the Hong RECORDS

6

Коор Hotel Orchestra by courtesy of the management. (During the intervals recorded music, will be broadcast from the Studio).

to 8 p.m.-A programme of

Columbia records.

6 to 6.18 p.m.-

"Stenka Razine" (Glazounow).—' Orchestra of the Brussels Royal Conservatoire conducted De aire Defauw.-L2183/9164. 0.18 to 0.35 p.m.-

Kinderseerien " (Scenes from Childhood) (R. Schumann).— Fanay Davies (Pinaist)-1£321/ 12322. Tp.m.-Stock quotations, etc. 8.35 to 7.10 p.m.—

Band Selections,

The Thistle" (Myddleton, arr. Winterbottom).Reg. Band of

,50 cts, each

and

$1.00 each,

DANCE MUSIC

20 cts, per copy..

Selection at

H.M. Grenadier Guarda-110 TSANG FOOK PIANO

Pomp and Ciroumstance March No. 1 (Elgar)-Reg. Band of H.M. Grenadier Guarda.-000D. "Rhapsodiann" (arr. Somers).-

Debroy Somers Band.-DX336. "The Grenadiers Waltz" (Wald-

teufel arr. Winterbottom). "Acclamations Waltz " (Wald- teufel).-Reg. Rand of H.M. Grenadier Guards.-DX336. 7.10 to 7.43 p.m.-

Variety.

Vocal Duet Blue Eyes-Blue Eyes."-Evelyn Laye and Geof- Irey Gwyther.. Vocal Duet-"Blue Eyes-Do I Do Wrong Evelyn Laye and Geoffrey Gwyther.-0434. Band-"Voyage in a Troopship” -Reg. Band of H.M. Grena-. dier Guards.-DX8.

COMPANY.

8, Des Voeux Road, Central (Entrance Ice Honso Street) Telephone 24648.

KONG HUNG TIDE TAKIN,

From October 13, to 19 1939.

·HIGH WATER. LOW WATER,

Vocal Duet "Happy Feet." Vocal Duet "Ro-Ro-Rollin'

14 Along-Layton and Johnstone Fri -DB12.

Bst. 15

Height,

Haight.

Hong

Hong

Kong

Koog

Standard

Standard

Time:

Time.

b. m

It al

k, my

Thur 13

08 35 8 8

0208

17

1435

$

હૈં.

084997

8

1455

17

0055

2

0207.14

15 16

1081

22 15

1586

7.43 to 8 p.m.-

Mon

17

11 16

0445 2

223) 7.2

1650

"Wembley Military Tattoo"-The Tum

Band of FL.M. Grenadier! Guards conducted by Capt. Wod 19 George Miller,➡0073/9074,

18

32-0 14.9

05.2

2346 17 3

180

1982 14 4 981

610

73

1809

Orchestral "Virginia" Seloc- comea

tion. London Theatro Orches-Sun. 16 tra.--0596.

The real sounds would shiver the microphone into a million pieces. The counterfeit is better. Rain, produced with real water, over the air with a 'sound of falling shrapnel: the "effects" chief gets real "mike" rain by gently drop- ping rice on to brown paper.

A Four-inch Door.

In the centre of Studio 6D is big table with a rotating top. It is a huge drum, its head in six sections, each giving out à different toned note,

varying from the grow of distant thunder to the

-443-Mon, Wed-&-Fri., p.m.&- crackle_of_slret lighting. There

6,000 Tron, Thurs., Sat, 8 p.m.

6,806 Bunday midnight

7,142 Daily 5.80 p. & 11 p.m. 7310 Not regular

7,730 Daily 11 pm

8,108 | Tuss, & Fri, 9 p.m.-1 am. 2.B.L.. 9,230 Not regular 9,503 Not regular |W.EX.A.F. 9,630 | Dally 7 6.m.

am, Sat. 8am. 'à 10 x,m, 9,420 Fri

Not regular 0,690 0,677 || Midnight daily 10,576 Not regular 11,020 Midnight-8 nm, daily 11,7517.80 p.m. à 3 a. m. dally, except

Saturday and Sunday

60.12

Zome

A.F.K Dobints (Germany) Xhabarovsk (Buzila) |RA.07. Nationw

A.GJ. E.F.N. 1.MA

4,000 6-10 p.m.

6,201 | Not regular

2

Porth

41.3

Bingapore

Kootwijk (Holland)

27.

Bangkok (Biamı)

·

31.55

Bydney Helbourne Schenectady

31:28

28.6.

27.8

25,53

Eindhoven (Holland) P.C.J. 2.F.C. Sydney Nairobi (Kenya) 7.L.Q. Bydney

2.M.E Dandoong Chelmsford (England) 5.9.W.

| P.L R

18.88

10.0

Manila Schenectady Bandoong Kootwijk (Holland) Bandoong. Bangkok Kootwijk (Holland) Bandong Nancy (France): Pittaurg

K.L.X.R.

12,240 Nightly

W.Z.X.O.

PL,G

16;102 Daily 6:80-

P.C.LL

16,304 Daily 7 pm.

P.L.F:

EL.S.LPJ,

P.O.K P.LE.

whole equipment is housed in a In the research carried out on 248 small compartment partitioned off in the brake van and requires little thin problem, it was found that 2236. room and the minimum of super the common theory, that man-made 18,4 vision.

static filled all the air was quite 17 The results so far obtained have indicated that it is possible for re-wrong that it really only trailed las ception on a railway journey to along close to altotric power lines. 1674 equal that obtainable under fixed The distance from these power lines 1808 station conditions in the home, and

when this facility is extended, as at which noise radiations usually it is almost certain to be, all long faded out was found to be 20 feet. distance railway passengers will be Now the next obvious step sound- Pasured of a reliable source of en-ed simple Just put an antenna. textainment on their journey.. up 30 feet away from the nearest

15.6

12,660 4. Wod., Fri., Sat,

0pm to midnight-

17,280 Daily 8 pan to midnight 17,761 Sundaya 7 p.m & midnight 18,404 Each afternoon.

19,320 Daily 6.80

| 19,851 | Daily 3 am,

WSIK. - 21,440) – Not regular -

p.m.

[Allowance must be made for "anismer time" in most Euro- pean countries, which is one hour ahead of true-tinku,]

are hooters and foghorns, bells and rattles. In one corner is a special door which is used exclusively for *** slamming" in radio plays, It

is 4in.. high!

Some twirling canos held against a slack drum-head provide the roar of a motor-boat. Bits of metal dropped on a sheet of iron give the sound of a breaking window, Tho handles of two dessert spoous when clicked together sound like the clash of swords. A wicker basket twisted-in-the-hands, provides tho | noise of police breaking a door in. Starch thumbed in a bowl becomes the sound of men crunching theix way through snow. A toothpick scraped on a unil-ale is the swing- ing of a hammock, and one, glass tumbler twisted inside another. sounds for all the world like the screech of motorcar brakes.

Α

GENUINE

0408 | 2

CLEARANCE SALE

of our entire stock of

Gramophones, Midgets, Radio's and Radio- Combinations. Real Bargains! Come early.

The Brunswick House

Arcade

Gloucester Building.