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RADIO TOPICS
AN INNOVATION.
WIRELESS WITHOUT
BATTERIES,
HIGH-TENSION UNITS.
BROADCAST CRISIS
NEW FRENCH BILL TO RAISE FUNDS.
RAILWAY RADIO.
CONTROLLING TRAINS BY
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WELL RECEIVED.
TUESDAY, FEBRUARY 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.)
ון
12.
B
14 S
19
12
13
14
[16
18
14.
20
12)
22
23
24
(25
126
28
29
130
32
35
76
58
the
40
41
42
44
45
46
27
48
Parts.There are few of the principal countries in Europe At the present time many people where broadcasting is so backward The Time-Honoured Method of are considering, the possibility of is in France. The trouble is due signalling switching engines by obtaining power for their wireless to the difficulty of reaching a deci- flashes of light from-a-tower may seta from the electricity supply son on the character of broadcast of the radio-telephone, we are told be discarded in the future in favour
maina.
Of the three necessary ing-whether it should be a State by S. R. Winters, writing in "Radio supplies, high tension, low tension, monopoly or whether it should News" (New York). Experimental and grid bias, the last-named is not have a sort of controlled liberty. phone Laboratories
testa conducted by the Bell Tele- at Gibson, very important, since grid bias bat- In order to effect improvements in Indiana, prove successful in con- tertes are comparatively inexpen- the service a clause was inserted in trolling the shifting of long lines sive and need to be renewed only at the Budget imposing new taxes, but of freight-cars, communicating infrequent intervals.
from a central control point to the the Communists tried to force Concerning
debate on the matter, and M. Poin-engine by radio. In a measure, a the remaining two, it will probably care, foaring that a long discussion radio antenna displaced the ordin be admitted that the high-tension would retard the passing of his ary coloured signal lights at supply is the more pressing need, separated from it.
Finance Bill, had the clause tower or the switchboard of the so-called "hump." Mr. Winters since the ordinary low-tension "ac-
The present situation is that the writes further: cumulator is, on the whole, very. Wireless Telephony Act passed in "The tool-box of the locomotive 1926 la nullified by this non-rati-engineer contained a radio receiv- fleation by Parliament. No. re-ing set, but instead of listening to sources are available, and in view Just a Cottage Small by a Water of this precarious situation the fall, he heard such orders as 'Slow Government has decided not to give down to two miles an posts, but to submit to Parliament authority for establishing private a bill for raising the necessary funde. As matters now stand, the tions may disappear before July 1 existing private, broadcasting ata- next.
| satisfactory, especially when the use of low-consumption valves makes frequent charging unneces-
SLTY.
works
were
hour." It A large number of high-tension
nected to a loudspeaker located in was a four-tube set and it was con- battery eliminator have been placed
head of the engineer. It was not the locomotive cab just above the on the market, and many, but by no means all, of them perform ex-
necessary to tune the receiver-the controls were locked and the cover) cellently, bath A.C. and D.C. models
closed" and fastened-and the en- being available. If the eliminator be The situation has been, compli-gine-man merely had to turn on or Green lights in- regarded merely as a more conven-cated by the action of authors and off the outfit.
composers, whose
dicated that it was functioning ient substitute for a dry battery, it broadcast without royalties being properly; red lights warned that Is probable that one of its chief ad- paid. It was in order to provide the vacuum-tubes had burned out, vantages will be lost. Nearly all for such royalties that it was pro- consisted of four vacuum-tubes, de- "Structurally this receiving set wireless sets using dry high-tension posed to increase the tax to 101riving their power supply from bat-f As, however, Parliament has not, batteries are operated with valves passed this tax and as there are no terles. Difficulty was experienced which are incapable of dealing ade-means available for paying royal in finding space for the antenna for quately with the power necessary to ties to authors and composers, it the receiver; it being finally placed, drive aloud-speaker for use in a modern works.
will be impossible to broadcast on the rear of the tender. It con
sisted of 150 feet of rubber-cover- normal sized room, afimply because
ed wire, wound around a form built it would be too expensive to provide
of two-by-four timber. plate current for power valve of sufficiently low alop resistance. With a mains until, on the other hand, the actual cost of the current le almost negligible, being usually less than that used by an ordinary
80-watt lamp.
Broadcasting in France requires, in fact, to be completely overhaul ed, and curiosity is felt as to the ultimate decisions of Parliament.
the cost of the eliminator will de- one is dealing with A.C., however, pand largely on its current output, and it may be necessary to effect A compromise by using a power valve, which will only require about 7 milliamperes plate current, at the cost of a certain amount of dis- An eliminator should also be test
The restriction as to the valves to be used in the wireless set la thus removed. This will, in gen- eral, only affect the power valve. For ordinary loudspeaker use this tortion.
to
On Control Point. "The transmitting set used. In these novel tests could be plugged into a lamp socket. In these ex-
the current you might expect periments the source of power was and in any house-lighting circuit The outfit closely resembled broadcast transmitter, except that, low power was used and it operat ed at shortwave-lengths.
velve should be of the power tyFeed for absence of hum. Since this master maintains his base of operaț}
120
having an amplification factor of 3-4 and a slope resistance of about 9,000 ohms. About
volts should
be applied to it. Under these conditions, and with the ap- propriate grid bias, its plate cur- rent will be about 25 milliamperes, so that we may say that the overall plate current consumption of the set will not exceed 80 milliamperes, In choosing an eliminator, then, it
re
"The transmitting set was in-: stalled at the so-called 'hump' orj the control point, where the yard-
hum depends to some extent on the installed in the house at the tions. The transmitter itself wAS electrical apparatus in the vicinity. hump. The operation was the test can only be carried out duced to utmost simplicity-relays the eliminator is to be used: Since set could be placed in action by satisfactorily at the place where one wire of the electric mains is
being provided so that the sending; usually earthed when an eliminator pushing a button on the micro- is used, the wireless set must have a condenser in the earth lead, or receiving set, tells us: short circuits may occur. Such a
"F. H. Betts, who designed the condenser is usually provided on
phone handle.
:
freight-trains from all directions. is first of all necessary to ensure the eliminator Itself. In the case It is the purpose of the yard to nort ""To the Gibson yard come that the voltages across its output of a D.C. three-wire system, how out the cars for each destination. terminals are up to their rated ever, a further precaution is neces- The incoming train is shoved up
HORIZONTAL 1-What is ona
thousand and two In Roman numerals?
-Marked by severity B-To proclaim 11-During some past
tim
15-Bingle
14-An antrance 15-What is the giganticj
fosell reptile, the "fah-lizard." called?
16-Consumed 17-Sooner than 19-What Indian chief
was called the "Feland of the Wilto Man"7
24-0 what firth la
Dundae, S. E. Scotland?
26-What Grock
combining form
• means "cerpent 1 27-Conjunction 29-elect 30-Bullen $1-What is the nick. name of Henryt 32-What is the first
aign of the zodiac7 34-What is a hedgerow called in England?
©THE INTERNATIONAL SYNDICATE,
VERTICAL 100t|--
HORIZONTAL (Cont.) { 36-What is a lovel
sandy region unit for farming called In 8. W. France? 36-Past
-What le another
French word for "debauchoo"?
10-A time-parlod
(pl. abbr.)
38-A boll on the eyelld 12-Old way of spoiling 40-in surveying what le
the laying out and 14-Appropriate measurement of a 16-Affected with Itch network of
19-Pertaining to place
In general 20-What is a musical
drama? 21-Purpened 22-Wh21 is a slip-int? 23-Worries 26-Interjection-
triangles called? 44-Hush! Hark! 48-To urgs to action 40-A food bird 47-To feed 48-A tay 49-Which one of
Napoleon's
marshale hot S
by the restoration government? VERTICAL
1-Me (French) 2-What was in
ancient Peruvian chief called?
3-What lone versad in the branch of zoology that trests of fishes?
B-A plaything B-An ample supply 7-What is the Latin
for "thing"7 Confirmation
en Alaskan Cekinis called?
30-What le en ale or
molody? 37-A cereal grass 38-City thoroughfaren
(abbr.) 39-In
time 40-Article
past
41-What is an olt mada
from claridad
butter called In
India?
42-Permit 43-No
(The solution of the above cross-word puzzle will appear in to-morrow's issue along with a new cross-word puzzle.)
ESTERDAY'S SOLUTION.
DRAM
MOTH BOILER TOURED. OR MERELANYO OF GAP
CAULK CUR LIFEYPREG ABC ENSUE DIN FAULT STRAND THINLY
INCI
IC9: BLENDS, DEALE PRODS ELE LEGAL YES, SCANT ANE RAT · WAGTE DEN
EC
SEEN ANTS 90- HAMLET LOWEST
· BELT AOTL
THE INTERNATIONAL SYNDICATE,
values when the eliminator la acsary, since if the negative side of \ to the top of a hill called the the yardmaster for practical opera- |
correct the system is being used to drive "hump; a car or a group of cars
tually delivering the amount of plate current (say, milliamperes) to a wireless set.
The Eliminator.
RADIO IN 1928.
PROSPECTS FOR THE NEW YEAR
་་་
What will wireless bring us in 19287 Prophecy of this kind is, I realise, perilous (writes a Wireless Correspondent), but I think there are one or two directions in which our feet can safely trend.
Ita progress in the year Just end- ed has been equal to that made in its earlier stages, and I see no rea son why even greater strides should not be made in the coming months. I feel quite certain that we.can safely wager upon.
A reliable service of Empire broadcasting.
native programmes for all.
The consummation of the re- gional station scheme with alter
simple "switch on to stations re- in the direction of quality-the A great improvement in receivers
towers.
quired", being predominant. "It was apparent how much Better programmes, with
useful the radio system hitherto recalcitrant elite of the
coloured signal-lights set from a "The asual railroad method uses switchboard. But it is obvious or
the
30 the eliminator the serial of the is "cut" from the train and consts him to do was to push the button on tion. All that was necessary for wireless set will be alive. This down the other side of the hill into the microphone and talk, practical- difficulty can be overcome by place the appropriate track. This Having chosen an eliminator ing a .001mid condenser of good quires frequent signals to the en- have been used to talk to any of the re-ly the same procedure as would which will give ita rated voltage on make in the aerial lead. load, it is advisable to ascertain A difficulty frequently encounter-
gineman.' whether the voltage rises very ed when using high-tension elimin- greatly when the load is removed. ators in the production in the wire portance, and will only be of im-frequency of the order of 20 dicated, or if individual orders when the yardmaster told the en- ranks of broadcasters, and, maybe, portance if at any time the power periods per second. This is cause could be given to it every specifle ginoman to come ahead with his even-- valve of the wireless set censea to ed by the fact that, from the point case, the control would be take its normal plate current of view of the high-tension supply, efficient. Then, too, mist
train at a good speed until the first (owing, for example, to loss of the set has a negative resistance. obliterates the signals. At best
almost car had reached the hump. As the emission), when the rise in voltage In other words, a transient increase they are only dimly visible in good the yardmaster made a wild grab for train was approaching at a speed of the eliminator might be sufficient in high-tension voltage will cause, daylight; and in the afternoon the
very close to ten miles per hour, to damage the remaining valves, a transient decrease in plats cur sur back of the signal and the microphone and shouted "Slow given to make no one think is not, Most wireless dealers employ tech-rent. nical assistants who will readily will be set up in the eliminator the engineman. When the signal some such order, and immediately in the fare so far provided. What It follows that oscillations makes Its light, almost invisible to down to two miles an hour.". The I believe, in the best interests of carry out the above tests for the smoothing circuit. Where trant lights are totally obscured, the slowed the train down as directed. can give the fillip needed? Not engineman had been expecting broadcasting. Stimulus is lacking prospective purchaser.
As already mentioned, distortion ble can be overcome by reversing of course, le cumbersome, and
former coupling is used the trou- roundhouse whistla is used. This, The radio system met with enthu- novelty that, I aver, is played
This precaution is of secondary tm-less set of an oscillation of very low that if more orders could be in-would be than that of signal lights/entertaining world joining the
more
4
The admission of controversial. matter into the material available
east, acceptable to the majority and for programmes.
The settled polfey type of broad-
las loud-speaker reproduction the leads to one side of the last better way of communicating with slastic recognition by all who were out except for the small minority:
the engineer was sought.
Results Described.
in touch with its operation. The of new listeners who would natur allway engineers who were preally treat all things wireless na slastic, and it may very well be. sent during the tests were enthu
novel:
No, I believe the "programme for that this small beginning may mean listeners who think has yet to the introduction of radio-telephony come and will arrive even if a over to to the railway field.";
atation has to be reserved for it!
cannot be obtained with valves tak transformer. With
resistance ing less than about 25-30 milliam coupled sets there is no such simple peres total plate current, and in the remedy. However, the substitution Caso of a D.O eliminator it would of high inductance chokes (asy 100The results are described as fol- be bad policy to select one which henries) in place of grid leaks in lowe was not capable of giving such a the low-frequency amplifier will current at its rated voltage. When usually prove effective.
After the preliminary testing the system was turned
BRINGING UP, FATHER.............!
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In SETS, SINGLE PACKETS, BAGS and in APPROVAL SHEETS.
GRACA & CO. Dealers in Postage Stamps, Philatelic Goods, Picture:
Postcards, Toys,
"No. 10, WYNDHAM STREET, P. O, Box No. 620, HONG KONG
50?
ARE YOU CALLING
·ME-DADDY?
·NO-TM
HOLLERIN.
AT YOU COME". DOWN HERE - S THEN I'LL CALL.
YOU:
WHO WUZ KERE:
THIS AFTERNOON "WITH YOUIN
THE PARLOR?
WHY- MYRTLE AND 1- DADDY-
WELL-PHONE-
MYRTLE, AN TELL" HER TO COME AN GIT HER PIPE SHE LEFT IT ON THE
„PIANO"
1920, by Tatt Fondun