· 10 ·
A New Shipment of
Gents'
Rain Coats
Just Received
All Marked at
Specially Low Prices.
See us before you buy your Rain Coats.
YEE SANG FAT CO.
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To the Hon. Treasurer
MRS. MCELDERRY, ·
160, Peak.
Please enroll me as a Member of the above Society,
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Address
Hong Kong's Artistic Photographers
PHOTO TAKEN DAY AND NIGHT.
THE
YING MING STUDIO
No. 50-52, Queen's Road Central. DEVELOPING, PRINTING AND ENLARGING. (Official Photographers of the "China Mail.")
BUSINESS DIRECTORY.
Bookbinders.
THE CHINA MAIL," Book-
→binders.
No. Sa, Wyndham Street,
Dentist.
HARRY FONG, Dentist,
1st floor, No. 74, Queen's Road Central Tel. Central No. 1255.
Electrical Supplies.
THE GLOBE FOOK CHEONG ELECTRICAL SUPPLY CO., LTD.
72, Queen's Road, Central. Tel. C. 3270.
Engineers &
Shipbuilders.
W. 8. BAILEY & CO., LTD.,
Engineers and Shipbuilders,
Kowloon Bay. New Work & Repairs,
Call Flag "L", Sole Agents for Kelvin Motors.
DO YOU WANT?
Price List of Flower and Vegetable Seeds for
1928 SEASON
with brief cultural instructions. and approximate time for SOWING.
The opportunity of forwarding you a copy, will be a pleasure and your commands will have our best attention.
GRACA & CO.
Dealers in Garden Beeds, Post Age Stamps, Picture Post cards, Toys, eto
No 10, WYNDHAM STREET,
P. O. Bax. No. 620, HONG KONG
Hair Dressers &
Booksellers.
LEE YEE,
Ladies' and Gentlemen's
Hair Dressers
Hair
and Booksellers. No. 12, D'Aguilar Street,
(opposite Queen's Theatre).
Dressing Saloon. HANSON SKEY,
Ladies' and Gentlemen's
First Class
Hair Dressers.
45, Des Voeux Rd. C., H.K.
Optician.
THE CHINA MAIL,
RADIO TOPICS
BORED BY B. B. C.
THE MAN WHO WEARIED OF WIRELESS.
TOO MANY TALKS.
RADIO NOTES.
CAN YOU GET SHARP TUNING?
Despite the Increasing popular- Ity of Reinartz, Hartley, and simi-
A week ago I bought a wireless lar circuits, it is still most excep- eat. Since then, night after night, 'tionally difficult for simple two-
LIGHT SOCKET.
AN A.BC. ELIMINATOR'
EXPLAINED.
BATTERY RENEWALS.
wwwwwwww
[By "Sparks."]
Since the inception of broadcast-
I have crouched before the loud and-three-valvers (without H. Fing and the meteoric popularity of speaker in an attitude of humble stages) to give good selectivity, exception, but
Accentuated Trouble.'
listening-in, radlo engineers have been striving to porfect an appara-
My friends are saying, "I told In some cases this trouble is actus that would do away with the you so" and they certainly did, centuated by the use of too large nuisance of battery renewals and confesses a correspondent in the an aerial, for with a great length maintenance. At the start most "Evening Standard."
of wire the resulting capacity.of the devices, while being right an One evening in particular-it damping and great "Impact" volt- far as the idea was concerned, fell was Wednesday-the programme age from all stations within range down on the job through the use of plumbed the depths of dullness prevents anything like sharp tun-poorly designed and inadequate with all moat incredible success. Ing being .obtained. Signal chokes and filters. Usually the fil At 6.20 there was a Talk on the strength is seldom seriously reduc- ter condensers were not large week's work in the garden. Nowed if the serial length of height is enough, and the eliminator was not I, in common with hosts of London-cut down. With powerful receivable to store up enough power or ers, have no garden. I live in a era small aerials are a sine que current to meet the demands of the flat.
non if sharp tuning is required. amplifiers during periods when loud
of
Gradually these drawbacks have
been eliminated, and, at the present time, it is possible for almost any
one to build, an eliminator out of
I am unselfishly prepared to Centre-tapped colls, as used in passages were being reproduced. sacrifice ten minutes to my fellow-some Harley modifications and the This gave à peculiar cut-out effect, listeners who live in the Great provision of a small aperiòdic and completely spoiled the quality Suburban Spaces where Men are aerial coupler, as in Reinartz cir- of the reception. Agriculturalists. Does it now, cuits, do much to prevent and however, occur to the B.B.C. that minimise the damping effect vast numbers of these suburban large aerials. The trouble cannot tillers live so far from the heart entirely be cured by "stunt" colls, of London that they cannot pos- however. Two and three-valvers ably have reached their homes by must generally be as simple and 6.20, when the gardening Talk be- straight forward as possible, and gins?
anything in the nature of com- At 6,80 there was another. Talk,plicated tuning colla or controle thia tima about the weather and must be barred. the news. For 15 minutes the B.B.C. Dance Orchestra interposed, After that, just for a change, there was a Talk.
Dr. J. Allson Glover did the talking, and his subject was "Heal ing Waters."
Keyboard Studies.
standard high grade parts that will not only function satisfactorily, but is also practically everlasting. The only component that is at all likely to wear out is the rectifying valve, and even this has a life of from five to seven thousand hours Wavetraps, although useful, are (roughly, five years of average ser- not the limit of perfection. They vice). The eliminator, then, may are a cure for non-selectivity, and be asld, to have arrived almost at not a prevention. Moreover, even its state of perfection. the simplest wavetrap means an
Ideal Selectivity.
In constructing such a fab, only added coll and condenser Imob the usual amount of care is neces- with which to "wangle" when tunsary, and the average amateur will The Itom which began at 7.15 Ing.
find no trouble at all. One point! was entitled, "The Foundations of Ideal selectivity can be obtain that should be considered, however, Music." It was a continuationed by adding one or more H.F.Is that the eliminator is only able from Monday and Tuesday of a valves, but not everyone is willing to supply a limited amount of cur- series of planoforte selections from to go to this expense. The real rent (in the vicinity of 800 milli-
the keyboard works of Bach. cause of non-selectivity is that amperes), and it is imperative, for Now the man who played them there is a leak for high-frequency successful operation, to connect the is`indubitably a fine pianist, but as currents across the aerial and valve filaments in series. This bas an ordinary intelligent middle-brow earth input. This leak reduces the¦ a dual purpose. First of all, it en- representative of the majority of efficiency of the tuning arrangeables five valves to be operated on 200's listeners. I demand to know ments and prevents sharp tuning. 250 milliamps (In the case of 201a why I should be expected to con-The first move is to find out where valves), and, secondly, by ar- centrate, my weary mind night this leak is occurring in your set. ranging the grid returns, it after night on the tortuous thrills Panel insulation leakages or the is possible to get the cor of the most scholarly of all com-use of condensers or coils which rect amount of grid bias on are not of the low-loss type may the tubes without the use of a grid posers.
By 725 Savoy-hill was well into be the primary cause; but even if bias or C battery, a feature that its stride; it was, in fact, ready all the components can be passed does away with some expensive re- with another Talk.
as satisfactory there in the pob-sistance and filters. In the case of This time it was Dr. H. J. W. sibility that the valve itself je a power valve being used in the Hetherington, and his subject was causing the look! If grid-condens-last stage the filament is fed with "The Meaning of Good." I wish er-and-leak rectification is used, raw A.G. from the five-volt tapping ed it had been "The Meaning of thon the matter is a certainty. on the secondary' of the transform- Good Programmės.”
Glance at the characteristic The next section of the pro-curve of the detector valve. Even gramme
daringly WA8
headed when the grid voltage is rero Getting down the actual "Variety," and for a moment there will, in most cases, be A almost believed it.
BT.
CONSTRUCTION.
con-
TUESDAY, AUGUST 14, 1928.
DAILY CROSS-WORD PUZZLE.
(This cross-word puzzle has been made by an expert
but our readers are warned to look out for occasional phonetic spellings, such as harbor, 'plow, and altho.)
12
113
เย
*
19
20
228
29
30
Зь
138 39
>
150
(HT
148
52
54
5 156 157
GA
+
139
160
16
1.2.
160
HORIZONTAL
1-Ta cover 4-Girl's name 7-The European viper 10-A great Babylonlan
lawolver
-12-A nuras glet in india
15-8ingla in kind 18-Consumed 18-Rewards 21-Pertaining to the
4
*
stars 23-With ■ alde glance 26-To establish in a
place 26-Closety.rainted 27-Genuine 28-8kilfu! 30-Royal Naval
Reserve (abbr.) 31-A tool 82-Apt 84-Depressed
36-An exclamation of
surprise
35-A Japanese
statesman 37-Batisfied 40-Enanara 43-To peak 44-A Hawalian goddess 45-An Interjection 47-Incapable of
measurement
49-Disorder
THE INTERNATIONAL SYNDICATE:
"HORIZONTAL (Cont.) I. VERTICAL (Cont.)
53-A publio way 54-Command 65-Profix meaning
besida
58-A light evening
moal
59-Who was awarded
the Nobel prize for peaca in 19057 |51-8alt (Latin)
62-Assert
63-Gresk goddess of
the dawn
VERTICAL
2-Interjection
-A sharer
4-1.Jove (Latin)
-A fortifed mound 6-Exist
17-Capital of Florida 10-Suffix denoting race 20-Scrutinize
21-Onca more
22-To taka leava
(abbr)
24-To sin
25-A man's name 28-A Mohammedan
proper name
29-A number 12-Kitchen utensi |33-Highest In position 37-A waxy.compound
having the bder of pappermint
38-A girl's name 89-A galf term
(40–To become firmly
united
7-Pertaining to ocen 41-Mantle of Minerva
depths
{42-An old Paris prison
-A note of the scale 144-A foot·lika organ
Who was fiert to 46-The (German)
47-To Insulate 48-A stable
sall around Africa to India 11-A legendary Swiss
peasant and liberator
13-A divlelen of Turkey
In Asin 14-The chest containing
the tables of the, law (Bible)
IC-A southern
62-An after dinner nap constellation
60-01 age (Latin-abbr.) {61-A astṭiement on
W. Coast of Greenland
55-8uffix forming
feminine names |65-Vegetable
67-A climbing plant. 89-Baypilan sun-god 50-Toward
(The solution of the above cross-word puzzle will appear in to-morrow's issue along with a new cross-word
puzzle.)
small amount of grid current flow-struction of the unit, the follow- After that, however, the an- ing. When the grid is 1 or 2 volta ing materials are needed:
1 G.E., (or other good make of nouncer told us in his quiet, con-positive (as it must be if grid-i
the power transformer), with a rated resistances being mounted on the fidential voice that we were in for leak rectification works,, for an interlude of Syncopated Comedy leak Itself maintains this potential capacity of 150 watts, and a second-panel to the left of ft. The fliter by two female singers.
difference) there is a considerable ary tapping of five volts for the block comes on the left hand- elde They Call it Comedy, amount of grid current flowing, power valve filament.
of the board, with the .buffer unit 160 Henry choke (centre tap between it and the transformer. The syncopating sistere began The fact that grid current flows
Valve and switch are mounted with a grave ditty called "We're means that the space between the per, or two 80 Henry chokes.
1 condenser block having the fol- directly behind the transformer Two Babes In a Wood."
grid and flament of the detector Free of all charge, I suggest valve is not an insulator, but is lowing capacities: 4, 4, 2, 1, 1 m.f. with the choke on the left (looking to future ayncopating broadcast a leak of not too high resistance. 1 buffer condenser block (two from the front of the panel), and
This leaky space is connected 1 mf. condensers). directly across the tuning coil, and hence the lack of selectivity.
era that if there
are songs like this one, in their repertoires they should forget them.
By way of light relief, the an- nouncer made a gloomy weather forecast, and told us the tithits of the news bulletin. After verify ing the first news item from my evening paper, I shut-off the set for a while and rested.
A Simple Care
Is to substitute anode-bend rec-
at about the middle of the rear 3 285 ohm resistances, capable of side of the baseboard, taking a load of 250 milliampares.
1 20 ohm fixed resistance.
Holes are drilled in the base- board, so that the connecting leads 1 10 ohm flament resistance from the transformer, chokes, fil-
ter, condensers, and controlling re-
S variable resistance, 100,000 sistances can be taken underneath.
tification, using a potentiometer, (power type). for the grid-leak system. With anode-bend the grid is several voits, ohms maximum.
1 variable resistance, 2,000 negative, and little or no grid cur-
maximum. rent can flow so there will be no
When I began to Baten-in again, loss of selectivity. Do not think nice, refreshing Talk was in full this is a wholesale condemnation awing. It was "How to Appre-jof grid-leak rectification, which is clate Pictures, Part One," and the indispensable on some occasional. lecturer was a learned Oxford pro- But when you have tried all the fessor.
tips you know to obtain selectiv-
For some minutes the professor Ry and have failed, give anode-
chance. told us the meaning of apprecia bend, rectification tion. He said in order to appre-Queue.
THE HONG KONG OPTICAL CO. ciate a thing one did not neces
'Phone 2282,
58, Queen's Road Central
Printers.
"THE CHINA MAIL,” General
Printers.
Publishers and Bookbinders, Sa, Wyndham Street. Tel. 6. 22.
sarily have to enjoy it. So I ap- preciated his lecture.
1 Raytheon rectifler valve, ma type....
1 valve socket.
8 terminals..
1 tumbler switch.
1 cord and plug.
This makes for a clean looking job, ohms and in addition keeps the wires
away from one another, so that no
YESTERDAY'S SOLUTION.
SCENE TARTS CEO EARLIER AMDİG RAMPAGE" ONICPER O PORES LOOGE I PECS ETHER ORIM SNZER SOD TEENY TREAT 3 FORDS: RLCERTAIN-P 25JÉN L BARGE NETUD PËR LARCH USER BARED GATE 6 LEMUR NOSED A HOLDÉST CONDUIT TRA CHIHEDA ASH ARCHY SPULT
LŪSME IRTENENTIONAL SYNIKŠTĖ.
950 short circuits can occur. The wir HONG KONG HEIGHTS
1 roll spaghetti covered wire.
LAYOUT.
Ing of the circuit is comparatively simple, although most set builders will and it perhaps a little harder to follow than the wiring of a re- ceiving set. Provided that a rea- 1 baseboard 14 in. by 16 in. by sonable amount of care is taken 4 in.
with the initial wiring, no trouble 1 panel 18 In. x7. In. x three-six-should be experienced in getting teenths.
the unit to work properly, and once In action, it is hardly likely to give any trouble at any time.
Briedy then it may be summed The layout is as follows:-The At 9.20 a symphony concert be by the B.B.C.'s Badly Bored Cus gan with some drowsy piano varia-tomers, vaguely hoping that some terminals are mounted on a bake-up as follows: Once the initial' tlons by Cesar Franck, played by thing can be done about it: Other lite strip, which is screwed to the cost and work are over, the build- Miss Myra. Hesa... ́....
readers of the "Evening Stand- left hand side of the baseboard, er should have a job that will tom- The last item was the overture ard" will doubtless have their sug, and arranged so that all the con-pletely do away with batteries, will to "Ivan the
nections to them can be taken un-operate at a cost somewhere in the Terrible," by gestions to make, Rimsky-Korsadkov. After a hasty Unless something can be done, derneath the baseboard. The vicinity of sixpence a week, and thewill supply all the power, that is glance at the title I cut off. you will hear of my wireless set transformer. Is mounted on
I have described, in detall, the next in the "Articles for Sale" right hand side of the baseboard, required without farther bother.
Immediately behind the panel the Truly a deafrable états. sort of "entertainment" endured column,
DINTY 15 RIGHT;ILL GO HOME AN SLEEP ALL AFTER: NOON-THEN I'LL BE AS PU
FRESH AS A DAISŤ
FOR THE PARTY 257 TO-NIGHT":
·HO-HUM! T,NEED THIS
REST "TOO
For the information of visitors the following list of some of the highest points on the Island and Mainland is published:-
Island.
Feet.
Victoria Peak Signal Station
1828
1774
Mt. Parker.
1734
Mountain Lodge
1725
The Eyrle
1725
Penk Hotel
1805
Tafkoo Sanatorium
1000
Mt Davis:
877
Bowen Road (flterbeds)....-297
Cars Mainland.
Feet.
Talmoshan
8124
Kowloon Penk
1971
BRINGING UP FATHER.
MRS JIGGÐ-NOW AJLIST BING THE
SCALES AND WHEN. YOU GET TO HIGH
"C": HOLD ITS
1. WIŚH 1-HAD LET HER GO TO EUROPE TO STUDY WHEN SHE ASKED ME
YEAR AGO-
8. 35:3×14 Faizuri Barvion, Inc. Grant Belikin rights manevad 250