Page
HONG TONG DAILY PRESS THURSDAY, AUGUST 11, 1932.
HIGH SLOPE
DETECTORS.
SOME INTERESTING FACTS ABOUT THIS TYPE
OF VALVE.
During the last season or so there has been a distinct movement to- wards the high slope" detector. Round--tho achievement of a big
large stago-u voltage from a comparatively smailį signal voltage.
The basic iden, of course, is quito
audio-frequently!
RADIO A
POPULAR RADIO MUSIC.
(BY DE GROOT.)
FEATURES
(of the past, presenting such work ¦ UNIQUE POSITION FOR
in it most simplified form so that
it may be acceptable to all tastes.
After all, the greatest tark of music is to amuse and give pleasure to the greatest number, and not
A good deal has been written late-merely to tickle the educated car of
the brilliant minority.
ly on the subject of the more popu. tar kind of radio music, and many musical authorities seem to have joined in a bitter complaint against it. Yet, in my opinion, it is both generally approved and necessary.
A Broadminded View.
Reached by Radio.
And, although there are comparn-
GEORGIC'S
MARCONI EQUIPMENT.
DUMMY FUNNEL FOUND AN ADVANTAGE FOR Direc.
TION FINDING.
The White Star liner Georgie tively few people who fully appre-provided unique accommodation for
cinte the complete technicalities of the Marconi wireless equipment by
The
WEATHER REPORTS BY WIRELESS.
TO-DAYS WIRELESS
PROGRAMME.
BROADCAST BY Z.B.W.
ON 355 METRES.
23743
CENTRAL RADIO
SERVICE
KING'S BLDG (Opp. Show Ferry)
11 to 11.30 a.m.-Stock quotations. 11.30 a.m.-Chinése programme. 12.30 p.m.-European programme of RADIO EXPERTS - WORK GUARANTEED 1 p.m.-Local time and weather
Columbia records.
report.
1.30 p.m.-Rugby Press news, etc. 2 p.m.-Close down.
An important service which wire- less renders to shipping is in con- nection with the collection, distri bution and reception of wireless weather reports. Writing in the Marine Cheerver in this connection Captain L. A. Brooke Smith, R.D., R.N.R.. Superintendent of the Marine Division of the Meteorolo the great masters, there are a very making use of the dummy funnel gical Office, Air Miniatry, states that despite the difficulties due to great many to whom their melodics į to house, the installation.
shipping depression it is essential I am myself the first to agree that make an irresistible appeal, and equipment, using a power of 1 the best works of the early comperhaps I am right in saying that kilowatts, will keep the ship into develop the practical utility of the voluntary service of marine posers still stand almost unequall-more of such people are reached by constant telegraphis communication ed; but, on the other hand, I see radio than by any ather vehicle of with land and other ships over ex-meteorology as an aid to navigation no reason why the art of composing music.
ceptionally long distances as it in-and so make it a greater factor in cludes valve transmitters and re-
the economical work of British Em. piro trade. Every reasonable effort geivers for long and short wave-
should therefore be made, Captain lengtha.
Brooke Smith says, to maintain the regular service of wireless weather reports by "selected ships" in all 6 to 8.13 p.m.- parts of the world and to make the best possible use of this informa- tion.
Experience, however, ban shown that this very worthy object is not always achieved in practice. Other music should be considered to have! This being vo, it would be merely phenomer conspire to defeat the stopped a hundred years or y ago. foolish of me to stand like a Canute, advantages which one would expect
Only the most ligoted and illegi-resolutely shutting my eyes to the to result from a detectar baving cal supporter of the ancient can rising tide of appreciation for all
The short wave transmitter and a high mutual conductance.
seriously argue that everything [forms of more popular music. receiver are installed as soparate These phenomena are usually con- which is not a parallel to a Bach Apart, again, from the two ex-unite, and the long wave receiver sidered collectively under the head-fugu: or a Chopin nocturne should, tremes of technical classic and sim-is provided with additional units to ing of “imput impedance," which be destroyed; yet that is practically pler modern music, we have the facilitate reception over long dis- means that their united effect on what we have been told recently. the detector stage is similar to This arbitrary way of dreiding placing an impedanco in parallel | what the public shall or shall not with the grid circuit. It is of in-be given is manifestly absurd. The terest, however, to analyse the exact erases of these lossca
world moves fastor now than, say, in Handel's day; just as we have superseded travel on horseback by travel in acroplanes, so do we find more modern temperaments needing quicker and simpler music than
ever-welcome melodies from French and Italian operas, which, though definitely debarred from inclusion in the category of classical music, are none the less delightful to the listener-in. and always pleasure to the performer.
are
A Happy Medium.
In the first place, mach of the trouble is due to inter-electrode capacity. High mutual conductance with high amplification factor means
To suggest that these should be de- low impedance, and to achieve this, heretofore, and something of an al-leted from our radio programmes the clearances between the elec-together lighter style of coinposi- altogether would certainly be to trodes of the valver must be made tion..
very small-thus increasing the When we have the leisure to en- inter-electrodo capacity. The pracjoy them, riding and Handel give tical effect of high anode-grid capa us intense plenusro still; but for city is equivalent to connecting between the grid and cathode n circuit possessing both capacity and
resistance.
"Miller Effect" Losses.
Two disastrous results follow: first, part of the energy received from the aerial is dissipated, thus decreasing the voltage available on the grid of the detector; and second, because the reaction shunt ed across the grid circuit varies with the frequency of the incoming signal, the gauging of the various tuned circuits will not be constant.
The resultant flat tuning of the grid vircuit reduces both the selec. tivity of the receiver and the voltage applied to the grid.
The combination of thesa evils is known as the "Miller effect," and is the principal enuse of inefficiency in circuits employing steep singo do tectors.
everday use the flying-machian or the popular song and dance tune are more convenient and satisfac tory to our hurrying, workaday, modern world,
Studying Pubile Taste.
I ara musician by profession, and it is as much my job to earn comforts (and luxuries when I can do soy for myself thereby as it is for a man to be a successful stock- broker or bank manager. Conse quently, like these others, I have to study public taste, letting my musical capabilities serve the parti- cular public which employs me, whether it be cinema audience, radio listeners, or what you will,
But, at least, the earning of raoney with my fiddle has helped me to be to this extent brondminded— that I recognise that genuine musi- cal talent is to be found among mo- dern work as well as among ancient, There is, however, ♫ further and that a capable conductor can source of loss, namely the lowering avail himself of his orchestra's the cathode-grid impedance, powers to get the maximum beauty which is almost inevitable in the and the greatest amount of musical. design of high-alope detectors. As effect, when playing this more mo- dern style of work, by artistic use
of
a result of this, the grid current flowing under detector conditions is of instruments and orchestrations fairly high and serious damping not known hitherto.
occurs in the grid circuit.
Methods of Treatment.
tances. This is done by increasing the amplification on the bigh fre Captain Brooke Smith points out quency side and by making the that in the Safety of Life at Sea tuning very selectivo by the use Convention cach maritime country of an independent oscillator, for which is party to it undertakes to nheterodyne reception. International
regulations regarding safety of life encourage the collection of meteoro- are satisfied by the provision of logical data by ships at sea and adequate emergency and lifeboat to arrange for its examination, equipment.
The Marconi Direction Finder dissemination and exchange in a in the Georgic is well screened manner most suitable for the pur from local electrical interference as pose of aiding navigation. This the aerial and direction finding in- wil render unnecessary the return abrumont are both inside the funnel which provides a metallic screen in writing of routine observations in addition to the sareening incor-by British ships to foreign institu- porated in the construction of the tions or by foreign ships to the the apparitus The top of the funnel Blog open, and the aerial British Meteorological Offer. being fitted on the roof of the cabin will therefore make possible the inside, permits uninterrupted resep limitation of British observing ships ition of wireless signals for direction
finding and it is anticipated that to a number suficient only for the accurate results will be obtained collection of such meteorological | without incurring the usual work of
dato as is still necessary and for
risk a very great falling off in the popularity of wireless as a form of entertainment.
I myself endeavour, by rendering all kinds of popular music with the utmost consideration, and by popu. arising the classic compositions as much as is possible, to create a happy medium within the ken of all lister-ers; and if I can do so; then I shall rest well content.
climinating electrical interference
I from the many motors on board.
HAVE YOU HEARD THESE?
Here are sts of long-wAYG and short-wave stations which should be picked up by anyone in Hong Hong who has a mode- rately good not suitable for re- ceiving such signale, Success in picking up these stations also depands very largely upon fay. nurable atmospheric conditione, Readers are invited to add to this list should they succeed in picking up any station not in- cluded in either of these Ext.
It can be calculated that if the mutual conductance is increased 100 Those who have heard my trches- per cent., the louses due, to inputtra perform will probably réaliso
67.65 impedance are increased by nearly that I do my best to make a popú- 60.12 300 per vent, and there is * delar number rise to its greatest 067 finite limit beyond which then possible height by novel orchestral sas
capacity Work, and a good des) of study or creased inter-electroda cancels any guin resulting from high briginal methods of treatment, mulițal conductance.
Overtoming ins Difiédity.
50,
LONG-WAVE STATIONS.
Wave length
Call Kilo- (Metres) Station Sign cyclo
200 Manila
KZL.B. 1,153 277 Sbanghai
K.B.M.S. 1,083 345 Tokyo J.O.A.E. 870 353 Hiroshima · J.O.F.K. 800 355 Hong Kong Z.B.W. 848 357.1 Bombay V.U.D. 840 381 Sapporo J.O.LK. 830 J.O.D.K. 820 J.O.C.K. BLO
300 Keijo 370 Nagoya 370.4 Calcutta
V.U.O. 800.9 390 Kumamoto J.O.G.E. 700 300 Sendai 7.0.H.K 170 J.Q.A.K, 760 J.O.B.K.. 760 C.M.B. 738 K.Z.R.M. 625
305 Dairen.
400 Osaka 410 Canton 480 Manila
SHORT WAVE STATIONS.
Ti (Hoxa Kono) OF WORKING
HS. P.J.
CYCLES
4,434 Mon., Wed & Fri., 6 pm, & 2 jam 4,930 6-10 p.. 5,201 Not regular
6,000 Tue, Thurs, Est. 8 p.m. 6,806 Smday midnight
7,142 Daily 6.80 p.m. 11 p.m.
7,310 Not regalar
7,780 Daily 11 p.m.
8,108 Tues & Fri.; p.m.-1 s.m.
0,220 Not regalar
9,603 Not regular
9,580 Daily 7
9,020 Fri. 3 a.m., 8ạt. 8 a.m. & 10 §.m.
9,500 Not regular
STATION
CALL BIO
Dobintz (Germany) A.F.K Khabarovsk (Rusija) | B.A97. Nauenw
A.G.J. Mosco
BVN. Botud
1.M.A.
42, $1.3 29.8
Forth
B.A.G.
Bingaporo
Kootwijk (Holland)
V.91.A.B. P.O.D.
In this way I endbarbar, un far
31,
Bangkok (Blam)
economic limit, had it is good news whole range of my brchestra's in- 27.8 to learn that one, manufacturer has had the courage to modify the destruments,
idea which inspired the composer, $1.20 Indecu, mány valves now, on the and to develop his theme by obtain 81.23 market have already exceeded, lising all the effect pidssible from the S
na is pormissible, to demonstrate the 31.65 31.48
45.3
Bydney
2.B.L.
Melbourne
Schenectady
W.EX.A.F.
28,5–
Eludboren (Holland) B.C.J. Sydney Nairobi (Kenya) Bydney
2.F.C.
TLO.
9,077 Midnight dally
2.M.E..
10,626 Not regular -----
26.60
Bandong. Ubalmsford (England), 6.8.W,
ELE
sign of an bilang high mag-detec
The Older Works
24.0
Manila
K.1.X.E
12,940 Nightly
11,020 Midnight-a.am. daliy 11,781 7.80 p.m. & 3 a.m, dilly, except
Saturday and Sunday
tor th order to obviate thoup, Igance,
29.35
Bohenectady
W.2.1.0.
12,850 4. Wed, Fri, Sat.
in spite of apparent reduction i
"paper" characteristics.
I need hardly say that I do not
18.88
Bandoeng
P.L.G.
10,102 Daily 0.80 p.m. to midnight
Kootwijk (Holland)
P.C.Li
16,304 Dally 7pm.
The Muliard 90s Vis now made abandon 11 the comfications of the
14
Bandoeng
P.LF
within slope of 2.2, as aminst poliler masters of music-that would 168. in o entier Wupplies. The inter be serving the publio just as badly 1874 electrode eppacity has been ap- proximately hired, and it has been if I omitted all the work of the
10.0
Bangkok
E.B.L.P.J.
17280 Day 8 pm to midnight 17,761 Bundays 7 pm & midnight
Kootwijk (Holland)
Bandong
FOK F.LE.
18,404 Eas afternoon.
10,920 Daily 6,30-7 p..
16.5
13.948
Nancy (France) Pittsburg
19,351 Daily 3 km.
WBXKi
21,640 Not regular
[Aldwance must be made for "summer-time" in most Eures pean countries, which is odé köbr sbead of trim time}
established by praction test that moderns. the how valve has a higher efficiency as Botebtor, and in addition, Its usu mproves the selectivity of the receiver and the accuracy of the ganging-of-tuning-condensers.
If I give a fair proporton of popular, numbers,, I also have con- stant recourse to the age-old fav- ourites composad, by the great men
1t
maintaining the selected ship rou-
tint wireless weather telegraphy service.
3 to 8 p.m.-European programmċ. 3 to 6 p.m.-A relay of the long Kong Hotel Orchestra. by courtesy of the management. (During the intervals recorded music will be broadcast from the Studio.)
6 to
8 p.m.-A programme Columbia records,
of
Hawaiian Muále.
Empty Bed Bluen."-Sung by Bessie Smith.-14312-D. "Panhase."
"That Lovin' Four."--Andrew Aiona's Novelty Four.-1786-D. 6.13 to 6.53 p.m.-
The great improvement in, the work at sea which marine observers had effected during late years, the number of ships laid up, and the need for national economy all make7 desirable a reduction in the num bers of the British observing fleet.
It has been decided, therefore, to reduce the number of ships keeping meteorological loge from 60 to 50; and it is important that reports sent in should give all essential in- 'formation in the most concise form.
4,000,000 WORDS BROADCAST.
B.B.C.'S YEARLY RECORD FOR SHORT TALKS.
In the 1775 talks given by the B.B.C. in a year there is a total of 3,800,000 words, the Radio Times-
computes.
"The method of preparing a talk varies with the broadcaster. Mr.
A: J: Alan's seeming carelessness is
the result of months of patient work,
in the course of which he records
his story time and again on the dictaphone. until he is telling it to his liking.
(Zar.
A Concert,
Violin Solo-" Mazurka "
zycki). Violin Solo-Romanza Andalu
Za " (Sarasate), Bronislaw Huberman.-L2932.
Song- Always be True "
(Connelly-Benatsky). Song-"The Song is Done" (Con- nelly Stolz)-Marie Burke (Sop- rario). DR. - Piano
SoloMinuetto from Suite" (Suk).
Piano Solo-Berecuse" (Chopin)
-Ignaz Friedman.-L2280. SongLes Millions D'Arlequin"
(Sangwin-Drigo),
Song" Vienna, City of My Dreams (Lockton-Sieczynski). --Charles Kutiman (Tenor);-- DB841.
'Cello Suto "Shenandoah" (Thi- man).
'Cello Solo-"The Meistersingers -Prize Sang" (Wagner, arr. Squire).-W.H. Squire.-Le160. p.m.-Stock quotations, etc... 6.53 to 7.23 p.m.-
Orchestral
"Dance of the Flowers" (De- libes)-Lucerne Kursaal. Or. chestra.-LX30.
"On the Asia"
Central Steppes of (Boroding). Orchestra
For TONE.
QUALITY,
BEAUTY,
DURABILITY,
obtain the
MORRISON
PIANO
(Guaranteed ten years) FOR SALE OR HIRE
at
TSANG FOOK PIANO COMPANY,
8, Des Voeux Road, Central,
(Entrance Tes Honan Street) Telephone 24048.
HOW WIRELESS SERVES
It is an accepted fact that the greater part of the news which fla
our newspapers relates to troubles de in Sociste des Concerts du and difficulties, and that the Conservatoire, Paris.-L219.
"Leonore Overture No. 1 (Beet. smooth-running events in businces hoven). Willem Mangelberg and daily life are rarely recorded.
and his Concertgebouw Orches- tra.-LX180.
7.23 to 8 p.m.-
Variety.
It was plehsant, therefore, to find recently that the Daily Herald re- corded an incident in regard to the use of wireless at sea which in- dicates very clearly the service Band-Day by Day."-Geraldo wireless renders every day but
and his Accordeon Band.-- DB829.
Song "An Ev'ning in Caroline.'
Marion Harris (Comedienne). ---DB8%
which is seldom recorded in public
Descriptive Sketch-" It Isn't print.
Cricket"-Clapham and Dwyer.
DB845.
Banjo Bolo-"Rhapsody оп
Mr. H. Gunning, joint organiser
Blue-Eddie Peabody--DB819 of the National Union, of Beamnen, Vocal Duet The Turning of the told the Daily Herald that wireless
Tide"--Layton and Johnstone... -DB827,
had saved more ships and lives at
Accordeon Dust-"O Sole Mio."
The Destifano Brothers, sea than any other invention, and DB130.
related one experience of his own Humorous Duct Oil"-Flena-
which showed how lives and pro- gan and Allen.-DB810, Song Spring is Here Again."perty are being protected daily by
Marion Harris (Comedienne). --DB851.
the avoidazice of accident owing to its use.
Vocal Duet My Mum"-Chick Endor and Charlie Parrell DB867.
8 p.m.-Local time and weather
report:
--Christopher-Stone-speaks-ul- 8:07 9.30 pm-Chinese pro
most impromptu,
Sir Walford Davies prepares a page of notes, and as often as not forgets to bring them.
"Mabel Constanduros and Michael Hogan write down every word in their
gramme.
* I was in a shipping office," Mr. Guaning said, when to wireless message came through from one of the company's feet in mid-ocean
9.30 to 10 p.m.-A, relay, of the
hand of the 1st Battn, South notifying a gale and very heavy, Wales Borderers, conducted by seas, against which it was impos Bandmaster Gocks, from the sible to måke much ɓlogress. Officer's Mess, Murray Bar-
"A man in an armchair looked racks, by courtesy of the Officer Commandings Kangna at the weather reports for adjoint 10 p.m.-Rugby mid-day Pressing areas, and found that do milel
news.
KILIMO.
sent, a wirelcas message to the
Buggins dialogue, work 10 to lido p.m.-Chimese pro- 18 the weather wad normal. Ho hours over one line, and never be lieve that it's funny when they've done it.
11.30 p.m.-Close down, W
All records in the shove Buro. skipper to advise him to take the pena programmes are supolied by now course, and so much delay and Messra, Anderson Music Co. "possible risk to life was avoided,