HONG KONG DAILY PRESS. THURSDAY, OCTOBER
1930.
COURAGE
RADIO
FEATURES
OF WIRELESS PIONEERS.
SUCCESSES ON SHORT WAVES.
HOW THE "IMPOSSIBLE" AND "USELESS" BECAME
PRACTICAL.
years
Mr. Percy W. Harris, M.I.R.E., other "experts" said that it would thom before an official friend, Editor of The Wireless Constructor,ba impossible to. communicato bo whom in England we should call. trace the history of wireless in the tweon England and America by notary-public. In later following article published in aradio, because of the curvature of
the earth. He simply went London paper:-
* Amateurs' Load.
on
Thirty-five years ago two people and did it, and just this spirit stood out as keep investigators of bag inspired the amatour through some remarkable electrics! pheno-out the history of wireless.
nena which seemed at the time to
In these days, whon wireless ro have no practical importance. "Wasting their time!" the man in jeeivers are more popular than the street would probably have pianos, and when the novelty of zaid.
what is one of the most marvellous
4
achievements of applied solence has worn off we are apt to forgot the prominent part amateurs have played in it.
the American Courts bold that this sworn statement, the date of which was cortified' by the notary-
public, constituted sufficient ence of priority of invention.
TO-DAY'S WIRELESS
PROGRAMME.
BROADCAST BY Z.BW. ON
330 METRES.
11 to 11.30a.m.-Commercial news, 11.30 . to 12.30 p.m.-Chinese
programme.
12.30 p.m.-European programme. 1.30 p.m.Weather report, 2 p.m.-Close down.
5 p.m.-Epropean programme of Vietor records supplied by Messra, Moutris & Co.
A Hunt in the Black Forest" (Voelker) and "In a Clock Stare (Orth)-Victor Concert Orchestra.
evidGlory of the Sea" and "The
While on the subject of reaction, the popular "Reinarte" method was due to another keen amatour, John L. Reinartz, who first publish. ed it in an amateur joginal.
Short Wave Successes.
It is in the realm of short, weÝCE, however, the the amateur haë chiefly distinguished himself. Al. ways keen on transmitting, the Tiroleas amours nover bien allowed to occupy the ganie wato-length banda as used for marefal stations, and
One of these enthusiasts was a ecientist, already world-famous, the other a young man just out of bis teens. The scientist had access to a fully equipped research labora
The important principle of re tory, while the young man was exaction which has added so much parimenting with the crudest of to the efficiency of wireless receiv home-made apparatus in his fa-
ers although when. abused it ther's garden.
causes a great deal of trouble!) was invented simultaneously in Yet in spite of lack of scienti-England and Amorica. The invon- carly years they were alloted
Marcent's Confidence.
Border Ballnd."-Peter Daw son, Bais Baritone,: "When Day is Done" and "Soli-1
loquy."-Paul Whiteman and his concert orchestra. "Always" and Just a Cottage
Small."Victor Balon Orch.. The Flower of Italy Waltz and Serenade"- Waltz - Rossi Band. Travellers All of Every Station " (Balfe) and The Kerry Dance" (Molloy).-Peter Daw-
son, Bass Baritone. havZigeuner" and "If Love Were
All."-Peggy Wood, Soprano. "Singin' In those
the Rain
and "Orange Blossom Time."- Johnny Marvin, Comedian. "The Dance of the Blue Danube"
and Laugh Olown, Laugh." Waring's Pennsylvanians. p.m. Children's programme. Norah Didsbury, a member of the Fairy Circle, will play a Seconde Pianoforte solo:- Valac," Benjamin Godard.. OPERATIC MUSIC.
wave lengths which were general-
to be useless for any practical or reliable work. They are of ne use to us-you can have them!" wna" the attitude adopted by the controlling authorities. :
fe experience and proper equiption in England came from a highly-ly agreed among "wireless experts" mont, it was the young man, Mar-trained expert on the Marconi coni, who becamo world-famous as Company's staff; 'in America it the inventor of wireless telegraphy, came from a young college studcut ..Bis kenness, enthurium, and named Armstrong, who was too energy-hig steadfast belief in his hard up" at the moment to awn invention caused him to be find the money for patent foce, and ittle obstacles which emedal whose fathor did not think su- most insuperable to the elder scien-cient of his ideas to advance him
ist with the greater training.
Five yours later thig same con- fidence and enthusiasm, made him. zmile when dozens of scientists and
Jlie
the money.
Armstrong himself had faith. He wrote out particulars of his invention, signed them, and put
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GECOPHONE
B.C. 3049. SCREEN GRID FOUR PORTABLE RECEIVER.
CABINET MODEL; IN SOLID MAHOGANY. An entirely new model incorporating the new "STORK" Lond Speaker movement and
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PRICE COMPLETE: £26.0.0
B.C. 3036. SCREEN GRID SHORT WAVE RECEIVER. THREE VALVE MODEL.
For wavelengths of approximately 14 to 100 metres. Motal case, finished dark brown crystalline enamel. Incorporates, two tuning condensers with double spaced vanes. A potentiometer is fitted for varying the bias on the detector valve. A screen grid valve. procodes the detector and this enables the set to oscillate easily on all wave bands irrespective of the length of the aerial; there are no "blind" spots. By using appropisto coils, this set may bo used un ordinary broadcast wayofongthe..
PRICE: £15. 0. 0.
It did not take long for experi menters on both sides of tho At lantic to fad. that really excellent work could be done with short waves, and to the intense surprise of the commercial companies. Transatlantic. amatour communica- tion on 200 metros or, so was soon being regularly achieved,
"Beam Transmissions. Later, when the transmitting facilities were still further curtail- od, amatour transmitters gained even greater successes on 100 me. tres. Still going down, they did better and better until they found and proved the wonderful reliabil ity and utility of the extremely. short waves which are now used. for "beam" tranemission's and other commercial short-wave work. Nowadays everyone knows the tremendous importance of, short- wave working, and for long-dis- tance communication the majority of transmissions are carried out on these short waves...
At the present time, instead of unexplored wave lengths to play. with, the amateur transmitters are confined to one or two extremely. narrow bauds, where, using about a tenth of the power of the eles- tric lamp suspended above their operating table, thay communicate daily with Australia, New Zealand the Pacific sea-board, America, and, in fact, with every part of the globe where other equally keen amateurs are listening.
One of these days, perhaps, some one will write the fully story-if that is possible-of what the amatour bas dono. for wireless.
WIRELESS AND AVIATION.
com
In their successful flight "from Portmarnock, Ireland, to Harbour Grace, Newfoundland, Captain Kingsford-Smith and bis panions created history in many ways. Theirs, for instance, was the first direct flight across the Atlan- tio from east to west in which
been kept course hos
6.30 to. 7 p.m.—
Sylvia Ballet-Cortego de Bag
chua" and "Travita"-Prelude. (Verdi). Victor Symphony Or- creetra& "Madame Butterly Fantasis
(Picain)
Victor Symphony, Orchestra. "Cavalleria Rusticana "-Selection
(Mascagni).-Creatore's Band, Traviata"Selection (Verdi)-
Creatore's Band. "Irish Rhapsody" (Herbert),-
Victor Symphony Orchestra. (Continued on next Column.)
QUERY CORNER.
MANILA.—It would seem that your aerial is too long for the lower wave lengths. Note the recent arti
half-wave aerials." Mean- cle. re while a small fixed condenser, join- ed in series with your aerial, should overcome the difficulty, It is as well to remember that capacity so inserted will tend to reduce the. natural frequency of the aerial.
JUNK BOX.-(1) Your circuit. calls for considerable screening at this stage, and the only solution to your hand-capacity trouble is to fix & screen of aluminium between the panel and the condenser vanes. (2) The only alteration necessary to your set to bring in the longer
wave lengths in marked in ink in your sketch of the circuit, which has been mailed to you. The num in bor of turns necessary to tune Z.BW will naturally depend on the diameter of tho former. Would recommend that you employ the standard two-pin coils, obtain able locally; size 60 will be found suitable for the local station.
7 to 3 p.m.-
+
A CONCERT.
The Lass with the Delicate Air" and "By the Water of Minne- tonka."--Mavis Bennett, So- prano.
"Deux Arabesques" (Debussy) and Waikuro (Wagner),--Julius) Schondo, Piano,
Here in the Quiet Hills" and Whatever Is, Is. Bent."-Easic Ackland, Contralto..
VI-Gloucestor's Soli- "Honry
loquy!! and Hamlet-Ham- let's Solilosuy-John Barry-
moro.
"Love's Old Sweet Song" and
·· “Kathleen"Unvourneen ”—John
McCormack, Tenor,
"My Love Duelt in a Northern
Land" (Elgar), and “Just a
Announcing the Arrival of
FIRST SHIPMENT
OF
ATWATER KENT
RADIO
The Very Latest Modern Screen Grid Radio; Distinguished by
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Every Set Carries & Warranty from Manufacturers.
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Come and Then Inspect It.
Little Ring" (Schubert) THE SINCERE Co., LTD.
Maraldi Trio, Vocal.
Prelude in G Minor" and "Pre- Jude in C Sharp Minor" (Rachmaninoff)-Victor Con-
cart Orchestra
16 p.m.-Chinese Studio Convert. 1pm-Weather/report. 10.30 p.man close down
HAVE YOU HEARD THESE?
Roza are lists of' long-wave and short-wave stations which should be picked up by anyone. In Hong Kong who has a mode. xately good sot suitable for xa- cafving such signals. Success in picking up these stations also depends very largely upon fav ourable atmospherio conditions.. Beaders are invited to add to. this list should they succeed in picking up any station not in cinded in either of these lists.
LONG-WAVE STATIONS.
Call Kilo-.
Sign cycle K.ZI.B. 1,159 K.S.M.3. 1,095 C.R.C. 1,070 K.R.C. 937 C.O.P.K. 015
Wave length (Metres) Station
260 Manila 277 Shanghai. 280 Tientsin 310 Shanghai. 320 Peping 345 Tokyo J.O.A.K. 870 353 Hiroshima 355 Hong Kong 387 Bombay Sapporo
381
333 Keijo 370 Nagoya 370.4 Calcutta 380 Kumamoto 300 Sendai 303 Dairon 308 Rangoon 100 Osaks 410 Canton. 413 Manila
SHORT-WAVE STATIONS.
STATION
GALL. BION
67.65 Dobints ((arziany)
AF.K. 60.12 Khabarovsk (Russia). [RAOT; 607 Nation *50, Moscowį.
lesine by means of directional 49.5
radio messages, according to Ander sea, Meyer & Company, Ltd., loent agents for Exide batteries Sach messages played, indeed. a vital part in the sale arrival of the 14 Southern Cross and its crew at Harbour Grace. Having safely traversed the great expanse of occan, the airmen ran into a blinda ing fog off the coast of Newfound land, and it would have beep proc
South
tically impossible to land safely without radio direction from the shore. The world already knows the epic messages that were trona. mitted and received on the Fern Cross. All of these depended on the Exide, batteries with which the airplane was equipped. As in other instances of history-making Nichts, the Exion equipment be boved - with unfailing eliciency.
BITDIGIL were able to find a so landing-place, precious lives were preserved, and a pallabt enterprise was brought to a successful issue.
Home
Perth
418
29.8
27.
82,6
103
B.V.N.
..oarg
J.0.F.K 850 Z.B.W. 848 V.U.B. 840 J.0.1.K. 830 J.O.D.K 820 JO.C.K 8101
809.9
V.U.C
J.O.G.K. 200 J.O.E.K. 770 J.D.A.K. 760 V.U.R. 754 J.O.B.K. 750 C.M.B. 73% K.Z.B.M720
Tie (Hoxe Kone).
OF WORKING
4,424 Mon., Wod & Fri, 6 p.m.& § am 4,000 | 6-10 pm.
5,291 | Not regular
4,000 Tue, Thurs, Eat. 8 p.m.
6.886 Bunday midnight be
IMA. 6.A.G. V.B.1.A.B. F.U.I HSAPJ 2.BL SL.0.2 W.2.XAF 0,830] Daily 78.31.
7,142 | | Daily 6.30 p.m. & 21 p.m.
7,810 Not regular
7,780 Daily, 11 p.m.
Singapore Kootwijk (Holland) Bangkok (Siam). Brandy "31.60 | Melbourne
8148 Schonectady 31.20 Eindhoven (Holland) P.C.J.: 31.38 Sydney
2.J.C. Nairobi (Kenya) - 28.0:Bydooy
2.M.E, PLE 278 Bandong 25.68 Chelmsford (England) 6.8.W***
245 | Manila
WI.O. F.LG.
23.35 | Schenectady 18.89 Dandong 18.4
Kootwijk (Holland)
P.CL
174 Fandoeng
PLT
10.0
Bangkoku
108
Kootwijk (Holland)
18.74 Bardoeng.
18.5 Nancy (France) 13.03 Pittsburg
1L8.1.0.
PLE
V.A.XX.
8,108 Tuos, & Fri, 9 pmeel a...
0,200 Not regular
9,603 Not regalar
8,020 Fri, 8 am,, Sat. 3 ám. & 10 am.
9,690 Not regular"
9,077 Mänight dally
10,840 Not regular 11,020) Midnight—0 sum, dálly 11,781.7.30 pm. &B'am, daily, sxcept
Saturday and Bunday
12,340 | Nightly 12,660
am Wed, Br, Bat. 10,102 Dally 630 p.m. to midnight
16,304 Daily 7 pm!
17.280 Dally 8 pm to midnight 37,751 Sundays 7 p.m. & midnight 18,404 | Each afternoon"
19,920 Daily 5.80–7 p.m.
19,351 Daily 3am.
21,540 Not regular
[Allowance must be made for sommer-time" in most Euro-
· pesa" countries,
is one boar ahead of trus time.]
SOUTH CHINA SOLE AGENTS."
A RADIO
THE
LOEWE FE
FE 63
9 tube set
A new shipment, just arrived, is one of the most sensitive instruments for long distance and recep- tion with six stages of high frequency.
This set is. fitted sabes and requires
Frame Aerial only
new.t
Can also be used with LOEWE short wave attachment.
Newly arrived
Loud Speakers of various types.
Pertrix Batteries 150 and 100 7. Gramophone pick ups of best quality. Gramophone Electric Motors,
BA ELIMINATORS A SPECIALITY to fit Pilot
Super Whasp and any other sets.
Demonstration Hours —
11-11.30 am. 12.30-1,80 p.m. 5-5.30 p.m.
During demonstration hours expert Europeau advice. is given on all Wireless matters.
THE
CANTON TRADING ASSOCIATION, LTD
CABL SCHROTER, Manager
TELEPHONE 24610;