1932-09-15 — Page 2

Page

HONG KONG DAILY PRESS, THURSDAY, SEPTEMBER 15, 1932.

FABIO 310

MADRID RADIOTELEGRAPH

CONFERENCE.

THE PROBLEM OF WAVELENGTHS.

+

The liberations of the International Radiotelegraph Confer ence which operied at Madrid on September 2, will be of the utmost importance to shipping because of the re-consideration which will be given to the allocation of wireless wavelengths be tween the various mobile, broadcasting, und point-to-paint wire- Les services. The article reviews the rapid growth of wireless communication of all kinds and developments leading up to the Madrid Conference.

I with

FEATURES

CHANGES.

with particulars relating to the GERMAN WIRELESS allocation of wavelengths to tha various servicea. It is interesting te note, however, that the 600 metre wavelength has appeared in all thres Conventions as definitely allocated to marine service. All distross calls, in addition to general calls, are now made on this wavelength.

The Problem for Madrid.

Having regard to the thorough revision of the Convention carried out at Washington, there will prob ably be very little work to do at Madrid in altoring regulations be cause those alrendy laid down have worked so well; but a good deal of discussion is expected on the re. aliceation of wavelengths.

The development of short wave' growth of broadcasting during the

RADIO AS PROPAGANDA WEAPON.

Berlin-A highly important new factor in the coming development of German affairs is the reorganisa, tion of the wireless.

ROBOT SETS ADVANTAGES.

AUTOMATIC VOLUME

CONTROL.

TO-DAY'S`` WIRELESS

PROGRAMME

BROADCAST BY Z.B.W.

ON 355 METRES.

Columbia recorda.

It was very natural to think that 11 to 11.30 a.m.-Stock quotations. when the knobs of the wireless, sot | 11.30. n.m.-Chinese programme, had been reduced to three one for 12.30 p.m.-European programme of tuning, one for regulating the Particularly welcome to all lovers volume and one for operating the 1 p.m.-Local time and weather

report. of good music was the news last wave-change switch-there could be

no further advance towards sim- 1.30 p.m.--Rugby Press news, etc week that from henceforward the

the coming p.m.-Close down. subsidy given to the Borlin Phil-plification. During harmonic from the Ministry of Reason there will be certain A.C. Culture was to be made dependent mains acts in which the volumes upon this orchestra giving regular control knob is no longer required, since the apparatus automatically radio concerts,

The first commercial application; public correspondence between land of wirelem was in connection with and ships at seh, and particularly marina telegraphy, and na it is the with regard to naval and military only possible means of communica- installations and to stations carry- tion with a ship at sea once the ing out communication between communication and the phenomenal In other German cities important adjusts the volume of its loud.

ahip has passed out of sight, it remains a vital service to all ship -ping. For this reason every deve lopment in the use of wireless is of the utmost importance to those lives are spent at sea; and repre- sentatives of marino, wireless ser vices will be Home of the most

vigilant delegates at the Madrid Conference at which other branches of wireless communication will be interested in obtaining concessions to facilitate their hetivities.

This is the fifth International Conference which has met to run- sider regulations concerning the use of wireless af sea, the carlier ones being the Berlin Conferences of 1003 and 1900, the London Con- ference of 1912, and the Washing ton Conference of 1927.

At Maurid the International Telegraph Conference, which deals with matters relating to the land and submarine telegraph and tele- phone services, will, for the first time, he held simultaneously with the International Radiotelegraph Conference, and one of the most important questions to ho considor ed will be the proposal to combine the International Telegraph, Tele- phone, and Radiotelegraph Conven- tions.

Amalgamation of Two Conventions.

The first International Telegraph Conference took place at St. Peters- burg in 1978 and the whole of the regulations governing international telegraph communications are based on the Convention which was the outcome of that Conference. Up till now the twe Conferences dual-

!

fixed points, the only obligations admitted in regard to these stations being that they should be bound to accept distress chills and give them priority of treatment

Early Wavelengths.

The 1903 Convention laid down that the two wavelengths of 300 and 600 metres should be used by ship stations for general correspondence and that 300 metres should be the normal wave length used. Other wavelengths between 600 and over were also admitted

1,600 metres

for special purposes; but the use of waves between 600 and 1,600 metres was reserved,

I

municipal orchestras have been last few years, the narrow band of called upon to co-operate in the wavelengths suitable for commen¦ same manner, and opera houses public use for broadcasting services will receive subsidies on the same and the large number of stations understanding. This implies that required to meet the public dein future the money accruing to maad, has created a difficult situa the Ministry of Posts from wireless ftion which it will be the business of licences will be directed in part

Madrid to attempt to solve.

into other channels. It also means that in frture Germany's musical life is no longer to be regarded as divided into public performances for the rich and wireless for the poor, but that the State will see to it that both are served from the

same sources.

As far as marine interests are concerned, it is of vital importance that they should retain the wave- lengths and privileges needed for efficient communication at sea, and their claims will have particular weight because, whereas other ser-

More important still vicas have alternativo means of

are the communication, by landline and

which In the 1912 Convention the use submarine cable, wireless is the negotiations in progress of the 300 and 300 metre wave- only available means of communi- limit the powers of the federal

their lengths was confirmed, hut 600 ention for ships and is of the utmost States in regard to metres became the normal wave-importance in safeguarding life and

regional transmitter. Radio is now length and an additional wave property on the high seas. length of 1,800 metres was chosen morchant navy is also largely restegarded as so powerful a method for long distance communication. ponsible for the trade and com- merce upon which the prosperity of The use of direction finding sta- tions using a wavelength not ex- the world depends, and care musé ceeding 150 metres was also dealt be taken that it is not handicapped

in carrying out its work. with in this Convention.

During the war extensive develop- ments took place in all fields of wireless communication and the Allies made their own regulations as to wavelengtha and procedura The use of continuous wave wireless telegraphy had been introduced and had been developed rapidly by the commercial wireless companies; and wireless telephony and direction finding had been developed. Ama teur wireless experimenters who were practically non-existence bo- fore the war, came on the scene soon after it was over, their ranks

ing with line telegraphy and wire-being recruited from the large num less telegraphy have met separately, ber of men who had been in the and, while certain fundamental re-

wireless services during the war. gulations dealing with the exchange of telegraph traffic which form part of the Telegraph Convention have

Tho

own

of propaganda that the central Government at Berlin intends to gain a firmer hold upon stations (Continued at foot of next column.]

HAVE YOU HEARD THESE?

Here are 1sts of long-wave and short-wave stations which should be picked up by anyone in Hong Kong who has a mode rately good set suitable for re- ceiving such signals. Success in- picking up these stations also depende very largely upon tav ourable atmospheric conditions. Readers are invited to add to this list should they succeed li pleking up any station not in cluded in either of these lista.

LONG-WAVE STATIONS.

WAVE length (Metres) Station

960 Manila 277 Shanghai 345 Tokyo 353 Hiroshima

speaker to the required level.

Automatic volume control, as it

3 to 8 p.m.-European programme,

to ep.m.-A relay of the Hong Kong, Orchestra, conducted by Mr. J. Futera, by courtesy of the Management. During the intervals recorded music will be broadcast from the Studio.)

0

to 8 p.m.-A programme of

Columbia records.

is called, is not likely to be seen in any but mains-operated seta, and then only in a few of the big- 6 to 6.27 p.m.-. gest of them.

When the set is fret installed the user tunen in the local station and then either makes (or has made for him by the man from the wireless shop) ar adjustment which brings the volume down to the level which is most pleasant for the reception of the programmes. He can then make a wireless tour of Europe, and every station with- in loudspeaker range of the set will come in with the same volume as the local.

Varloty.

Vocal Duet-" Mon Cocur."

Maurice Chevalier and Yvonne Valice.

Song "Je Ne Dis Pas Non."-- Maurice Chevalièr (Baritone).-

4-102.

Saxophone Solo Llewellyn

Waltz."

Saxophone Solo-" Souvenir.”—

Wieloaft.-1070.

Vocal Duet "Love and Kisses," Vocal Duel-"The Girl Across the Way."Mr. Flotsam and Mr. Jetsam, 2012, Marimba Solo-" Aloha Oe." Xylophone, SoloMinuet."--

Rudy Starita.-1782. 6.27 to 0.40 p.m.-" William Tell" Overture (Rossini).-Sir Henry J. Wood conducting the New Queen's Hall Orchestra.-6033/

p.m.-Stock quotations, etc.

"FADING" NUISANCE.

Another great advantage of

when a station is fading. Every automatic volume control is found reader must be familiar with this wireless nuisance. With an ordi-

station is roaring in at one mo- nary set, a signal from a distent

ment, bat almost silent a little later on. When automatic volume | 6.10 to 7,30 p.m.---` control is Atted the set adjusts its own magnification to suit the strength of the signal..

Automatic volume control is ac complished by means of an extra valvo working in conjunction with Call Kilo- Sign

variable-Mu screen-grid amplifiers. cycle K.Z.I.B. 1,13

The extra valve's duty is to change K.8.M.S. 1,083 automatically the grid bias of the J.O.A.K. 670

high-frequency amplifying valves so

850 J.O.F.K.

that the signal is always, brought Z.B.W. 1448 up or kept down to a desired leve! V.U.B. 840 of strength. J.O.LK. 680 JO.D.K. 890 J.0.0.K. 610 V.U.C. B00.0 380 Kumamoto J.O.G.K. 780 390 Sendai J.O..K. 770 J.Q.A.K. 760 J.O.B.K 760 C.M.B. 159 E.Z.R.M. €25

355 Hong Kong 357.1 Bombay 361 Sapporo 366 Keijo

370 Nagoya

370.4 Caloutta

305 Dairen

400 Oska 410 Canton 480 Manila

SHORT-WAVE STATIONS.

STATION

CALL BIOM

KILO

CYCLES

TIME (Hona Kova) OF WORKING

4,434 Mon, Wed, Fri., 6 p.m. & 9 Num 4,000 6-10 p.m.

7,142 | Dally 8.80 p.m. & 11 p.m. 7,310 Not regular"

67.66 Dobluts (Germany) | A.F.K

Khabarovsk (Busela) |RA.97. 60.12

Kanbaw 56.7

A.G.J.

6,201 Not regular

50.

Mosco

EF.N.

6,000 Tam, Thurs, Sat., 6 p.m.

48.5 42.

Rome

1.MA,

0,800 Banday midnight

Porth

D.A.G,

Bingapore

V.8.1.A.B,

38.9

87.

86.2

Sydney Melbourne 31.48 Schenectady

Kootwijk (Holland) P.C.L. Bangkok (Biam) H.S.4PJ.

2.B.L.

7,780 Daily 1 p.m

8,108 | Tros. & Fri., § p.m.-1 a.m. 9,220 Not regular &LO. 9.603 Not regular W.3.X.LE. 9,680 Daily

Recasting the Convention,

With all these developmente it been incorporated in the Radio-became necessary to re-arrange and telegraph Convention, radiotele- r-writo the Radiotelegraph Con- graphy has been the subject of vention, and to allot the available separate legislation. With the steps wavelengths to the various services that have been taken during recent and claimants. Prolonged negotia- years for the merging of large cable tionis took placo in order to find a and wireless telegraph interests,

basis of agreement and resulted in however, it has been felt that the

the Conference at Washington in two Conventions could usefully be

1027. At this Conference, which amalgamated, and this will be one

lasted six weeks, the Radiotele considered at of the questions to bo

graph Convention was entirely re- Madrid.

cast, bringing within its scope all At the Radiotelegraph Conference types and classes of radioelectric 41.8 held in Berlin in 1003, 27 countries communications including the trans- were represented At the London mission of facsimiles which was Conference in 1019 the number had then the most recent development 31.56 incrensed to 41; and at Washing of the art...

81.20 Eludhoven (Holland) P.C.J ton in 1927 70 countries were repre- Unlike its predecessors, then, the

31.28 Sydney

Nairobi (Kenya) sented.

Washington Convention takes eog- 28.6 Bydney At the carlier Confereness of nizance not only of ship stations 37.8 1900 and 1912 little attention was but also of all other mobile services given to the use of wireless for on land and in the air; fixed land 24.6 anything but marine communica stations including wireless beacon 18.88 tion. In 1000 the possibility of its stations, direction finding stations, 18. use on a large scale for point-to- and broadcasting stations; and sta- point land communications does not tions for international point-to-point 103 seem to have entered into the dis-

communication. cussion; but in the 1919 Convention this development of wireless was recognised to the extent that the Conventions the question of wave high contracting-parties declared lengths was dismissed zu e para- that they preserved their entire liberty with regard to radiotelegraph, in the Washington Conven- graph installations not used for tion of 1997 two pages are taken up

9,620 Fr. 8 am, Sat, 8 am, & 10 LIL 9,500 Not regular

9,077 Midnight daily

11,020 Midnight--3 aan, daffy 11,751 7.30 pm. & 5 am, daily, except

Baturday and Bunday

12,940 Nightly

12,850 4m. Wed, Fri, Sat,

2.F.C.

T.L.O.

2.M.E,

10,520 Not regular

25.53

Handoong Chelmsford (England) 5.8.W.

F.I.E

Manila

28.86

Schenectady Dandoeng

W.2.1.0.

17.6 10.0

Kootwijk (Holland) Bandoong

16,804 Dally 7 p..

Bangkok

Kootwijk (Holland)

25.74 16.5

Bandoeng

PLF. HL.S.1.P.J. P.C.K. P.ZE.

17.280 Daily 8 pm to midnight

19,404 Each afternoon.

19,920 Daily 5.80-7.p..

Nancy (France)

19,861 Daily Bad.

W.8.I.K.

27,840 Not regular.

Whereas, in the 1908 and 1912 16.93.

Pittsburg

P.LLG.

F.C.L

16,102 Daily 6.80 p.m. to midnight

17,761 Bundays 7 pm & midnight

{Allowanca.must be made for "snamer-tima" in mont Euro- pean countries, which is one hour shead of true time.]

A second kind of robot set will be of particular interest to battery users. One of the great drawbacks of the wonderful pentode valve in the past was the large amount of high-tension current that it requir ed. By a stroke of sheer genius an extra valve is made to control the pentode.

When the set is switched on, but. no station is coming in, the extra valve applies such a strong nega- tive bias to the pentode that the high-tension current is cut down to nothing.

situated in the distant corners of the Reich..

It is proposed either to limit re- gional option in regard to the broadcasting of news by abolishing the local watch.committees or, al ternatively, to increase the central government's zubaidy, over and above that of the federal State in question, and buy out private: shareholders entirely.

Sinto it is agreed that as present ali political parties should be allowed

their to broadcast opinions, save the Communists. arrangements are being made for German Communists to broadcast over the Leningrad transmitter.

..

3050.

A Concert,

Song "The Auld Scots Sangs |

(Behtune and Leeson),

arr.

Song "I'm Glad My Ho'rt's My Ain (arr. Inglis-Margaret F. Stewart (Soprano).-4758. Violin Solo Bourree in B

Minor" (Bach). Violin Solo-Tijuca-" Saudades

de Brazi!" (Milhaud, Levy)-Joseph Szigetti.-D1633, Chorus-- Island Sheiling Song”, (Hebridean Song). Greenock Male Voice Choir,--4523. Instrumental Trio- Hungarian Dance, No. 6" (Brahms, Squire). Instrumental

23743

CENTRAL RADIO

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RADIO EXPERTS - WORK GUARANTEED

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obtain the

MORRISON

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TSANG FOOK PIANO COMPANY,

8, Des Vœux Road, Central

(Entrance Ice House Street) Telephone 24648,

"People Who Matter”

PEOPLE WHO MATTER, to the

advertiser are the. people who can afford to bay his goods. Most of these people buy

and read the.

Trio-"Spring Hong Kong Daily Press.

Song" (Mendelssohn-Squire).-

J. H. Squire Celcate Triu.- 30031.

Song "The Little Irish Girl!!

(Lohr-Teschemacher).

Song" Annie Laurie" (Tradi tional) Fraser Gange (Bari Lone),--5172.

Piano Solo" Moment Musical"

(Schubert-Godowsky).

Piano Solo-" Tango (Albeniz-

-Reg. Band of H.M. Grena- dier Guarda-4071/4972.

Away for Rio" (arr. Carey). "Shenandoah" (arr. Caroy).

Godowsky).-Leff Pouishno Arthur Jordan (Tenor),~3500.

4830.

Negro

Spiritual Nobody Knowe de Trouble 1, Sees" (arr. Guion),

Negro Spiritual: Run, Mary

Ron" (arr.

Guion).-Edno

Thomas (Soprano).-5101. Instrumental

Trio“Valsc

Tristo" (Sibelius).The Cher -niavsky Trio,-3737R. 7.30 to 8 p.m. --**

Band Selections and Sea Shanties.

(a)

"Tom's Gone to Hilo," (b) "What Shall We Do With the Drunken Bailor P: (arr. Terry). (a) "Blow the Man Down," (b) "The Merchant Ship" (arr. Terry and Shaw)-The League of Arts Choir.163. Nell Gwyn Dances " (German). (Continued on nezt Volanina)

Humoresque" (Dvorak).—Reg. H.M. Grenadier Band of Guards.---4972..

p.m.-Local time and weather

report.

8.03 to 9.30, p.m.-Chinese Studio

Concert.

0.30 to 10 p.m.-A relay of the band of the 1st Batth. South Wales Borderers', conducted by Bandmaster Gecka, from the Officers' Mess, Murray Bar- racks, by courtesy of the Officer Commanding.?!

10 pm-Rugby mid-day Preas,

news.

10 to 11.30 p.m.-Chinese Studio

Convert.

11:30 p.m.-Close down.

All records in the above. Euro- peau programmes are supplied by Mossra Anderson Music Co.