Newspaper Page Text
The Tribune Radio?News* of the Air Routes?By Jack Binns
Aerial Fqual iu Lenglh to
One Full Wave Length
Sueeesafully Ueed to
O vri'f o m e Interference
Is Dirrctional in Effecl
Test Sureepj>ful on Less*
Than One Horoepower
A -very rrmarkable neiial 1ns been
devis^d ^hich has greatly insvensed tho
efieifpey of trans-Atlantic wireless
telegraphy. It is known as the Bever
xc-p ?ntenna, and its use has mate
rially- reduced static interference, in
fact so much so that engincers art
perimenting with it for use in the re
ception of broadcast radiophone en
The. most notable achievement of thr
Beverage antenno wa = in December of
last year, when Paul Godley, the famous
American amateur, used it in Scotland
on the oecasion of the amateur trans
Atlarftfc radio tests. With this type of
neriaf/iodlcv succeeded in receiving no
/cwer than twenty-seven different
American amateur stations. overy one
of which was using less than one kilo
watt.of power in their transmitters. In
his report of the test Godley wrote:
"On Wednesday the 7th the 1.300 foot
strcteh of line was completed. the wire
being - supnorted by 2x4 inch nosts
twelve feet high and Isid out to point
Hirectly toward Chicago. The wire wa->
groufided at the distant end through a
non-induct;ve resistancc 1 2.",0 to 400
ohms) and at the home end through a
variaUe inductance of the order of 0.
1 microhenry in value. This consti
tutes the Beverage antenna.
Aerial Equals One Wavelength
"For any given wavelength the wire
should be one or two even wavelengths
long. Arrangements were made to
changie the length of the wire, it being
necessary in each case to sbift the
non-induot lve resistance nnd ground
connection from one suporting pole to
"Signal potentials built up in such a
wire are approximately equivalent to
those which would be built up in a ver
tical wtre one-tenth 1 at most; of its
total length. When working at 200
meters and having a wire length of au
proximate'y 660 feet 1 one wavelength).
signal potentials produced in the wire
would be equivalent fo those produced
jn a vertical nire 60 feet in height, or,
if the full wire were used, 1$0 feet in
height; at that wavelength. Furfchefr
moie, the system is highly directional,
and eliminates a great poi tion of the
atmospherics and interference" comihg
from directions other than those from
which one wishes to receive.
"That this condition did exis; wns
rroved by eomparison with a *mal! ver
tical wire ,,upporif(l by a nearbv tree.
Static to <Agcal ratio in all cases was
tiecidedly better 011 the Beverage wire.*'
Of course. it will be seen at the 0111
set that such nn a'-rial cannct be used
by every radio fan, because of i;;
great length, and the fact that only a
few persons, comparatively speaking,
can erect such a long wire.
Aerial N'in* Miles Long.
Terhaps the best way to explain the
operation of- this type of antenna will
be by describing its use in connection
with tbe giganfic station at Radio Cen?
tral. Riverhead, L. I. This station re
ceives from tbe long distance European
stations which are using wave?
lengths ranging around 15,000 meters
in length, or. in other words, each elec
tro-magnetic wave sent out from these
stations is approximately nine miles
Xow jn order to fui fi 1! all of lhe re
quiiements of the thcory covering thn
eperation of the Beverage antenna, it
i? necessary to have a receiving aerial
one fqll wave length long. or. in othrr
?words, a receiving aeria! nine miles in
length'. This is exactly what has heeu
installed at Riverhead. The aerial is
rune miles long, and is sunported on
poles thirty feet above thc ground. one
end being grounded through a non-in
Hnctive resistance. and the other
through a variable inductance. With
fthis wire tbe Riverhead station is dailv
receiving five different European sta?
tions simultancously without interfer?
In flesigning this aerial advantage
?w-as taken of the fact that static is to
a certain extont greatly loeali/.cd. and
also rvf the fact that certain tvnes of
ner:al*sre very directional in" effect.
The non-inductive resistance at one of
tbe antenna goaks up thc interference
and passes it to ground.
Static Is Immature Lightning
For^ instance, static is lightning in
the making. and a congested center
*uch as N'ew York. with its hcated air
Tising from th.e big buildings, pro
duces?a great quantity of local static.
This would be n very serious situa?
tion -for Riverhead but for the loca
tior. of Xew Vork, which makes a
Beverage antenna very effective in
<>liniir(Bting this local static, as thc
fignal-s are coming from the opposite
clirectioti to the static.
In vrdcr to illustrate thc operation
rf the Beverage antenna G. H. Clarke,
an cngineer of the Radio Corporation!
has drawn th.e following analogy for
"If?we look upon the Beverage an?
tenna- as a large lake,'-' he *-:ay.s, "and
the wifffc as the static. wc ran get an
idea how it works. Now, suppose the
Wind ir blowing ncross thc lake from
east te-west. At thc eastern end there
?will b*e "little or no ripples. but as we
get to the western end the ripples
will gradually increase in size to full
Waves. If the shore at the we?tern
<nd is a gentlc siope of sand? gravei
tho waves will bc dissipatod "^nd wJU
not '?>?? reflectcd.
"If, on the other hand. the hore 01
tne iake is prceipitou.-; and rockv thc
?waves will be rcflocted and wii!
flisturb tbe rnstorn end of the lake.
Kow the Beverage antenna. ha'-'mg a
ron-induetive resistance at its non
recciviri.e end. eorrc-aponds to a sancly
nA.?n , i.?5u.<o it absorbs thc static
end intcrfering waves and does not
Auaiogy Ehtplain-a System.
"Carryit-.g tbe analogy further. if we
place?a itationary padole wheei at \he '
?western end of the lake, which is rr-1
volving uniformiy and producing;
wave4 ?r a uniform character. these I
wave* will travel steadily forward to-i
ward 'the onstern end and will not he ;
H.terrujited by or stopped by the wind.
lhis*paddic wheei correinonds with I
the transmitt.irig station ar.d the!
vaveg it sends out are equivalent to
Making Moves in Aneient Game Via Ether
? .. y.-,.: -.:.:'
. ? photogrxptur Faid, "Photo shoics Miss Rosalind Kendall. of i\etc
\nrh. calling her move, while her fricnd in Chicago sends bach by
radiophonc." In the excilcment of the tnomenl she forgot to put thc
trattsmltting tttbes in thrir sockets
Britain to Let Down Barriers
Against Home Radiophone Sets
Marcohi Head Dcclares England Will Give America
Good Race for Supremacy When She Starts;
Claims Snperiority in Tube Sels
By Warre B. Wclla
I rot.i Thi rriVunc* Europea ? Bvrea i
LONDON, April 21.- England, which
to-day can claim no more than a few
thousand radio fans against the million
of the United States, plans to start in
on the business right away and show
America just how the radio game
should be played.
The authority for this statement is
no less a perr.on than Godfre'y Isaacs,
managing director of .'larcjni's vVire
less Telegraph Company, who has ju3t
arrived in London after a vis.it to tbe
Contiiicnl. i-.-u>:cs Ipoks forwriV'd lo lhe
time when thfer'd is jrolng t<> be a radlo
reeeiving set in "very Englijlj home. .
and this time is coming soon, he says.
^ !i;;' '-' the matter with radio it:
England? Why is this country 50 far
in -x;c',i an inferior nosition to the
united .state-- in wireless development?
Godfrey Isaacs answers these questions
in two worda- "government control."
lhe Use of reeeiving apparatus by
private persons has been made almost
impossible up to the present bv the
cont nuance of the licensihg system bv
the Postoffice. .
British Well Aheud ls Claim
Thd position in this country. it must
.)?? allowed, ha.i been a little different
Irom that \rt the United States; wnr
time eomiitions have necessarily given
a point of view that tiie American au?
thorities have nol had to take. lt is
not due. it is claimed, to anv lack of
technical skill 01 knowledge that wire?
less telephon.y ha? not made anv cbm
paiable strides over here. British ex
perts are not one bit behind American
and in the handling of valve rec^ption
and transmission are possiblv fn ad?
vance, it is said. Tbe one difficulty
has been the ofticial restrictions.
Now. according 10 Godfrev Isaacs
the postoffice is going to change its
policy and to hUo.v every facilitv for
the extension of wireless telephony.
Ai. important announcement is ex?
pected when Parliament reassemblcs
And when thc restrictions have i,e.'n
removed or modified there will be noth?
ing; to prevent a very b;.; advance
Godfwy is:,;h:^ thinks that govern
' ment control in the earlv stages of
( radio 111 this country may turn out in
I tbe enn to have heen a cnou thing He
' hoped. he said, that England would
take the new extension in a more seri
| ous and sobor way than it had bee;l
. taken across the Atlantic. "I don't
; want to see 'radio fiV here." remarked
| MarcOni s managing director. "fn
, the waves from the European station.
"The tcsts t'nat have been con
j ducted at Riverhead completely con
j linn this theory. When we placo our
j reeeiving apparatus nt thc- end which
; is ?Tounded through the non-inductive
i resmance it is impossible to hear
anything hut a terrific roar of con
| tmuous static discharge. Using thc
wire properly as r. Beverage antenna
tve are able to conduct trans-Atlantic
| wire!,.*:.-, communication without any
! difficulty whalsoever, despite the static
, 'These facts nre so significant that
J we arc carrying out a series of c
penments with short waves. These so
, far are very promising, but as Vet arc
: r.ot completc. and until thev are we
. do not mtend making any announce
1 ment concerning them.
, ?'Of course. rye reaii=e that neoolo
dwelling ir, cities cannot erect Hev
;erage antenns, nnd coPsequentlv we
are seeking some other means to "over
' come tiie.st-.tic situation so far as they
nre concerned. The Beverage antenna
suggests several promising methods
wh cn wc hope will^olve the probkni."
jUnion Collar Radio Set
Increased in Range
Trajif?mjtjin?r Ae.paratus of tbe
Student Bcdy Now t acs
By Lewis B. Sebririg Jr, 73
Radio bfoaJca3ting 'na- i'ntftfduced
? ti ie people or ea.'tc-.-, v(.,v york
[-state by thq Union College RaqMo Clulv
| 011 the nighi of October 14, 1920, when
. phonograp,, music was sent throvtffh
: the i.ir to p -onio within a 100-tnilc
! tadius of Schenectady, -N V? home pf
the coitege. For th" next two month*
1 this station, conducted entirely by
I college studen*s. v.-.is the first oiie -iii
the Uuitod States to regularly bioad
ca?-ii .Tiusieal programs. Soon After
the s?.*r.t of the first commerctn*}brrnul- *
casting station tbe Union radio oper
ators add^d to their Weekly coiic'erts
complote Sunday tiijrb.t church serv?
ices, with college pro?ossora giving
Although radio work is entirely out
sidi" the regular curriculum fbflowed
at Union College. it bas grown in im
portartce until at present it is consid
ered on,? of the foremost activities nt
the institution. Since they sent out
the first program in 1920 the students
America the boom is niAier premature.
The equipment in use is rather primi
tive and not such as we should like to
s?r employed here. 1 think that
America is going ahead too fast in this
dircction. and I can focesce chaotic
conditions if iPdiseriminalo and vast
use 0f wirelcss telephony comes,"' he
Marconi "Lying Lo?"
Outlining his company's plans as
soon as the Postmnster General gives
faciliti.es, Godfrey fs:<ucs said: "We
have been lying low for a long time,
spending many thousands of pounds in
research and improvement, and no
country in lhe world is better cquipped
than ,we are to-day to put wirefess
eommunicat ion into general use. This
is not merely a seheme. We can do it
as soon as we get the word 'Go' from
Tiie Marconi company's plan is to
have broadcasiing stations, say two or
three. in differont parts of the country,
and to bav? a program foi- diffcrerit
hours of the day. lt wil! transmit by
particular wave lengths, which will be
so confined as to reach only those who
use particular receivers. This, in
lsaae's view. will avoid the danger of
cacophony, which mny hc experienced
Ile propose s thai receiving sets
should not be sold outright, but hired
out at a charge which will not bc more
Aian the cosl of present telephone in
stnllations. The American practice of
selling the apparaius i?. he thinks, a
groat mistake. Modifications, he points
out, will he inlroduced in the apparatus
from time to time, and once a man hsd
boughl his set he would not feel happy
:''. soon after. he had to buy something
better. Experts here agiee emphatical
!y with his statement that scie.ntifically
Epgland is able to do everything ths;t
is done in America, and to do it on
F.ngllsh Press Backs Plan
The British press is rapidly lining
up behind tiie drive. "America," says
?-?ne paper. "has already embraced this
new era with both srms. Just ns it
seized the idea of the film with eager
ha.nds, so it has gripped the idea of
a wireless telephone in every home.
American imagination, American in
itiative, American eniJi'gy are driving
the new era along at-u gallop."
What does t'no wirelcss telephone in
the home mean? asks another. "lt
means n great. new industry, astound
ing extension of knowledge, immeasur
able sources of entertainment, better
business facilitics, new political melh
ods, an end fo homc isolation and
"Step into the homc telephone era."
That is the new English slogan,
have succeeded in reaching, via the
radiophone route, practieallv every
state in the Union east of the Missis'
sippi River and north of thc Carolinas,
to say nothing of. .many provincos ln
Canada, and ships far out on the At?
The old license. 2XQ. which becamc
famiuar to hundred-, in the vicinity of
Schonectady, has been supplaiUed by
license W KL, under which the college
is now broadeesting regular Sunday
night educational programs. The week?
ly programs are now such n ? might be
expected from an ?educational inatitu
ln the matter of apparatus the Union
Radio Club is particularly well i
equipped. The latest addition to the
sendmg station. and the sei which is \
ttcix being used to broadcast under
WRL. is a I-kilowatt phone set, u<;ing i
four 250-wa'.t trapsmitting tubes. Thc
principal item of fche set is a 2.000-volt
direct current gencrator, installed in
the electrical engineering building of i
the college. This give.-, the set nearly
four times the capacity of the one :
formerly used and about twice the '
sending radius. The antenna is of lhe j
fan type, 60 feet bigb and 70 feet long,
with -adial count?rpoiso and buried I
What the ftji.ure' holds for the st.u
denl organisr.tlon i? ns much u matter
of conjeclurc as \* is v. ith thc iarger
commercial' broadensting stations. It I
is tho wish of thc nien now to continue :
as far as possible a nrogram of Instruc
fciyc ts'lis. Tbe work is gladly dor.e by :
the college men as a pnrt'of their!
'te.-]tra-curriculuni activity and is wholly '
without compnsation. The apprecia-.
tion of vndio amateurs within a hun
dred-mtie radius was appu'-ont in Jan-'
U&ry of this year. when at the invits
rion of the Union Co'leirc wireless men l
about 300 radio fans gathered .from the i
ea'pitel di-rricl io stand the first1
cwlio convention ever held in eastern
Nev,- Vork State. ... |
Bariio Taughl Schools Now!
An innovotion in tbe Chicago public j
sfbool system will be the 'inslructor- ;
loiJ-" einssroom. according to Peter A. !
Mortenson, superinte.ndent of the pub- |
11c schools1 of that city. Inotructors will
lecture into transmitting stations at ,'
central points. making it possible for
one instructor to serve a number |
of classes. The classrooms will be
equipped with radio receiving sets and
loud talkere. Many subjects will be in
cluded in the new plan. Mothers at
home may tune in on the lectures and
get a pretty good idea of what their
children are being taught.
Pogftibility of Developing
Earlier Experimentg Ie j
Suggcstcd as Means to
Would Need Less Power I
Such System Would Increase
Secrecy of Publie Radio
What are we going to do when every
available wnvelength in the ether is
occupied? That is the question which
is causing the United States quite a
lot of concern in tha endeavor to bring
order out of the present chaos which
eharacterizes ratiio communlcation. ln
fact. the problem i< univeraal, and it
will undoubtedly be the chief topic to
br discussed at the next meeting of the
International Radio Convention.
To thc novice perhaps the situation
does not ap,tear to be so difficult, but
it must be reali'/.cd that. the number
of wave-lengtha which are theoretically
at our disposal are not actually avail?
able in practice, "due to the fact. that
tuning is r.ot 100 per cent efficient..
Theoretically there should be 300,
000,000 different wave lengths avail?
able. but in practice at the present time
there are considerably less than 20.000,
but. even these are badly congestec.
and with the advent of broadcast
radio-phone entertainment the r.onges
tion is becom'.ng worse daily.
Engineers Will Sotv* Problem
The problem is not merely one for
t'r.e lejrislators. Their efforts can only
end in regulation, which of course will
only ameliorate the situation and not
solve tbe problem. The solution lies
in the hands of the radio engineers,
who will have to devise apparatu*
Which will eliminate a great deal of
the present Interference, and at the
same time give us a greater number of
available wave lengths ?o operate on
by making tuning more sharp both in
lhe transmitting and receh-lng stations.
In theory it. is possible to operate!
for instance, on every individual wave.
length between 860 meters and J'.TO
meters, but in actual practice this is
just a wave b?nd. and uil stations op?
erating on wave lengths within those
two hmits will interfeve with each
'I h" advent of continuous wave tel
egraphy ar.d telephony has done a great
deal toward maklnR tuning shnrper, s0 '
that Wave lengths fairly close together
can operate without interfering with ;
oach other. but the condition is by no
The situation offers a wonderful
opportunity for -the inventor, partic?
ularly in view of the tremendous pub?
lie interest. in radio, nnd eonsequentiy
the reward will be rieh for success.
ln this respeet it might be pointcd
out that one of the solutions could pox
sibly be reached by cxpcrimenlation
along abandoncd lines. Why would it
not he possible to inve?,figat"e the pos
sibilittes of the reflecton of elpciro
magnetie waves'.' It seems to me there
is an opportunity there, especially for
wireless telegraphic work and radio
telephone inlevcommunication between
two fixed stations.
Waven Can Be Reflecled
What I mean by reflection can be ex-,
p'ained by giving an outline of some of
?the early work in the development of
wireless. lt was discovcred early by
the origmal experimenters that ele'etro
magnetie. waves were practically identi
cal with light waves, with tho execption
that they were very much longer and,
consequentiy, -cvare not vlsible. to the
human eye. In every other respect.
however, they were the same. ns light
waves. It was found that they could
be reflectod, rcfracted and po'larired,
just the same as light waves could, al?
though, of course, the methods for ac
complishng this were different.
When Marconi lirst began his experi
rr.enls he used two huge reflectors on
his transmitting apparatus to "reflect"
the waves in a certain direction. The
development of wireless naturally took
place on the sea, and reflection wns
quickly abandoned, because of the bet?
ter results obtained on moving ships
with the system of sending the waves
out simultaneously in every direction.
Now that radio is so highly de?
veloped, a great deal of congestion
could be eliminated by the use of re
flected waves. By this I mean the de?
velopment of apparatus which will
focus the waves and send them out in
one direction only, just in the same I
manner as a beam of light ls focused
in a searchlight and sent out in a
straigbt line. ? -
With such a system as this for
trans-Atlantic communieation. for in- ,
stance, all the cnergy of the transmit
ting station would be utilir.ed where it
was most needed. and tbe present loss
from radiation in all other directions
would be eliminated. Thus less power
would be requircd to bridge the dis- j
tance over which it was desired to com- I
municate, and furthermore the station }
in question would not intcrfere with ;
others in the area in which it was not
requircd to operate.
As we are about to have trans-Atlantic '
wireles telephony, such a directive sys?
tem would be of material advantage,
not only in cutting down the amount
of poiver requircd and eliminating un
necessRry interference, but also in the
matter of secrecy, because it would
nnrrcw down the number of stations
w.hich could listen in on the eonversa?
tion that waa passing between the two
Women Form Radio League
Th* Women's Radio League of
America, Ine., held ils flrst annual
meeting on Tuesday evening, May 2, in
room 907, Y. W. C. A. Building, Fifly
thicd Street nnd Lexington. Avenue.
The followinjr officers were elected:
P/esident, Miss Abbio Morrison; vice
president, Mrs. Elenhor G. Regan; sec?
retary. Mrs. J. Koch; treasurer, Miss
The regular meetings of the league
are held on the first ar.d third Tuesday
?M'enings of every month at the abova
address. Code practice for thdse who
wish it is at 8 p. m? busineis meet?
ing at 8:80 and the speaker of th* eve?
ning at 9.
At th* next meeting, on May 16, A.
H. Hebert. ah offlcial of the American
Radio Relay League and member of
the second district executive council,
will speak on "Co-operation and Or
All. women interested in radio are
invited to attend these meetings, and
if desired eoursea in radlo telegraphy
er telephony ean be arranged for.
They Call lt "Radio Flu9i in England
$&f.KgW%&mX%?SS$&i-7/7:. ?? -My-.. !.. .,... ,7-7.;-:.-!. ? 7 r? ? -.-..-. Wf.'' . :. . %
The picture shows Frank Walsh. n young British amateur, playing a
game of chess by radio. in liis home at Brighton. England. He has just
tcirelessed a more to his brother in Paris. Radio is being rapidly
popularized in Europe
The Night Silence Reigned
In the Ether About New York
An Amateur Describcs Historic Occasion When thc
Nightly Jargon of Amateur Conversation Was
Stillcfl in the Facc of Disaster
By Charles William Taussig
Ten or tifteen years ago were the
pioneering days of th- radio amateur?
in New Tork. That was tbe time when
John Grinan ("J. G."). Walter I.cm
rnon f-'W. I.."), Vermilya ("V. ':?'.." f
"W. X.." "J. X.." "A. F." and many
others held nightly conversations over
the ether unconfrollcd By the strong
arm of the law. Waves were as broad
ns they were long in those days, with
no limits to length.
All night long you could henr the
Xew York amateurs talking to one an?
other. The air was full of pleasantrics,
foolishness, bnntering, squabbling,
qunrreling, fanuning, in both the Moise
and Continental codes for at that
time both of these codes were in use
on thc wircless. Thc Tower of Babe!
ran a poor second to thc ether ten or
tifteen years ago.
But there was one time. when disas
ter oveitook the steamship Titanic,
that the ether was clear. It was nn the
night of April 15. 101". Xew York'
little world of ethcY waves the day be?
fore was in its usual turbulence. It
was impossible to get a message
khrough the babel of amateur chatter.
The usual flippancies went on among
old radio friends. as was the custom
every evening, wkh no one hearing th?
fp.r cry from the vast space of th.e
Atlantic Ocean nor the answering call
of the succoring ship, the Carpathia,
which came to the rescue of the sur
vivors of thc sinking Titanic.
Static Held Up List
Xew York's little radio population
was aghast tbe following morning when
reading of the cata-strophe. Each
thought unto himself, "How can 1 be of
some assist.ance'.'" Little by iittlc
news was avriving in Xew York giving
tiome of the details. The newspapers
told us that the nnmes of the survivors
were being held up due to the severe
static difiturbanees. and when night,
came only a partial list. of the sur?
vivors bnd reached Xew York.
Without being told and witb no oi
ganir.ation to get, them together, tho
amateurs of New York and vicinity dis?
covered thejiart that wns allotted to
them to render assistance in this
trngedy. At 8 o'clock the evening fol?
lowing the sinking of thc Titanic, wh?n
1 picked un my telephone receivers and
tuned in, I wns not greeted by the
usual din and noise. but in its stead
was an oppressive, awfiil silence. Ex?
cept for the mournfu! rumblings and
grumblir.gs of the static not a sound
was to be heard, and yet every ama?
teur was at his post with the self-im
posed task of trying to copv tbe names
of tbe survivors of tbe Titanic that
the U. S. S. Salem was trying to get
through to tbe Xewport (R. I.) naval
station. 'Twi.xt static crashes each of
us was copying tbe names of those who
were fortunate enough to be saved.
Hou;' after hour we copied what lit?
tle we could get. for the static would
at times-completely oblitei-ate the sig
nals from the Salem. Twice during the
long period the silence. was broken ?
once by tho German station TWT. in
the Trinity Building. on Broadway
Hardly had their loud spark been im
pressed upon the ether when the steri
lorian spark of Dr. Hudson warned
them to keep out. Dr, Hudson, an
ardent amateur, was the self-appointed
patrolman that night. nnd his spark
was the law, with no one disputing its
authority. Once again during the night
an amateur sent out a call, but he also
bowed to the renroving sirjnals from
old I) R.
'Throujjb the night we laborcd at ou'r
lask, an*J when morning came our frag
mentary reeord ot" the messages sent
out hy the Salem, pieced together with
the messages copied hy the Newport
naval station. ennbled th.' newspapers
to publish n full list of the survivors.
Govermnenl Will Give Advice
Om Lighining Proteetion
Radio fans should give heed to fire
insurar.ee rules in connection with the
"hooking up'' of radio equipment.
otherwise the rates ,,n their proper?
ties may be raised or the insurance re?
fused entirely. warns the Bureau of
Standards of tbe Department of Com
nVerce in calling attention to the fact
that lire insurance regulations govern
ihg the installation of radio apparatus
ar:- to be revised.
According lo-the Department of Com
ruerce, the rule which has beretofore
covered radio ihstallations is known as
Rule Sti of the National Electrical (rire)
Code, and in connection with a Ren
oral reyision of this code a change in
this rule has been deecided upon. The
matter i* being considered bv a com?
mittee of the National Board of Fire
The Department of Commerce has
prepared a mimeograpbed circular con
taining tentative requirements which
have been suggested tor adoption. It
wiTl probably he a matter of several
months before the definite require
menfs are decided upon. but in the
meantimc any one who has teal use
for the above-mentioned circular may
secure acopy by writing lo the Bureau
of Standards, Department of Commerce,
Washington. D. C, for their letter cir?
cular No. 62, "Proposed Revision of
Rulo Sfj of the National Electrical
(fire) Code on Radio Equipment." Wil
|am S'. Boyd. chairman of the Xationai
Fire Protection Association, 175 W.
Jackson Boulevard, Chicago, 111.. will
also be g'.ad to receive any suggestions
Cojjleges to Exchange News
A wireless news service has been
planned by the Harvard Wireless Club.
An rlfort wil! he made to co-operate
other universities in broadcasting in
tercollegiate news of interest to the
students and nlumnae. The club is
equipped with a set that will transmit
500 miles and receive any station east
of the Mississippi. Schedules of the
service and naipes of those colleges
co-operating will be announced later.
-? . ...
Statr* Police to Get Radio
Tbe supcrintendents of state police
of the ste.tes of, New York. Massachu?
setts. Connectieut. Penn.<?\ Ivania, New
Jersey and Michigan, in conference in
New Vork, seriously discussed tbe ad
VisabiljLty of equipping their stations j
with radio systcms. A system has '
alfeady been installed in Pennsylvania '
which will be officially teste'd this'
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? We carry a complete line which
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Wireiess in the/ Homef .l-6o
ABC of Vaeuum Tubes $1,00
DAVID KILLOCH COMPANY
57 MURRAY ST.
Long Distance Workers
Ship Opp.rator in Chile
Hcar* WJZ 4,000 Miles
While lying in tho harbor of
Iriuiffiie, Chile, on the we%t coast of
South America, !hc operator of the
steamshio Santa I.uina 'of the Grace
Lliie ciearly heard. the entirc concTrt
<>f WJZ. Tbe distance separating New?
ark station from Ibo steamship in an
air line was 4.000 miles.
N'ot, only did lhe operntor hcar the
entire program, but a large number ot
visitors from t.he nitrate works ashore
were on the ship at tho time and th?.y
crowded into lhe wireiess cabin co
listen to thc music. in a statement re?
garding ihe incident a representative
of the line, after reading the operator's
and captain's report-, said:
"The visitors, comfortably gituated
in the four corner- of the room, lis
?tcned with wonder nnd astonishment
Ito tbe various melodiea reproduced by
Irthe operator's instruments, which were
j heard quite distinctly, even to the
exient in some- instanccs of being able
to distinguish the different instruments
comprising the orchestra. Thc visitois
left the stesm-r greatlv irnm-..,. *
this latest wonder of rn-X, "^ *''t>
the employment of .vhieh ,cl?Ti.>(
made posible by th- mj" H'a* Wlly
? *--()uipment of the steamer"'" W*,*1<M
Patenti Cover Cr^
The- followmjr letter ?..,*? r?
: by The Tribune Radio from ,. J1?***
i son, general manager of th "
"Please br advi?eo that th. fn?
nt. cover the use ??$***
the la8t two ^
gn-en being circuit P?..?ntv. .' "
933,263, 1,104,066, 1,104,078 i,?'1'
577,461, 904,222, 1.213.260. I.i^jfc.
"These patents have beer * '?'
to the Radio fJorporation fey th<*f**
lese Speclalty Apparatus rom,,,..1"''""
Bo = ton. Lb*- iatt*
'"r company r,,_.
the right to manufacf ire Bnd<r "*
patenta. [f you so desire ??, ?, .
these patents up at the N?rywJj
Iic Library, Forty-seconil ..r/. Jr
VCTify same. "" '" ?>*
"Ir, order that you may flflt . ,
your reade;., reza-d.ng- patejft.ZT**1
tal detector sets we believe M?*!?fc
give some space to the fact
tal detector receivinsr or* '? ' Cr'r"
ented." Sr* *??
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Short Wave Receiving Sets, Tuners, Detectors
HM-1 Riccirtnc T-.nw
Other bright stars on the firmament of HORNE Products are the:
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HORNE MANUFACTURING COMPANY
30 CHURCH STREET
New York City
Mercer and Colgate Stf
Get reliable wire for best resolts. In?
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NEW YORK OFFICE
50 CHURCH STREET
Radio Bvoadcast Map
FREE With tbe May issue
Iil swlal sQDp-.bnient forro. ahotrlni
al! broaacasUng stations in r. s
RS"? Oraele (Question.. & An<wer?l
FUdiophcnlnc irom SHip to Shore
Chicago Police adept Radiophme
Radio Receiver In Fountaln Pnn
Ooean Danelnq to Radio Musie
Strnpleet Redioptieno Roeclw
Contlnuous Radio Rec?rd?r
Radio Roeeptlon en Aircraft
What Caused tho Slgnv-s
Raelo Conatnictor Hlnts
Radio for tho Beainner
Rolloloa vla tho Ether
Edison a Radio Fon
n? ? j. R*.dl0 on Alrwatt
Z0 Radio Article* for the Beainner
All in the May issue of
Now On All News Stands
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Opi-ri !> a. ni. till ?> p.' jn,
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The Radio Re
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New York Ctt j
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877 7th Ave. at 56th St.
Fboae t irt-ie ;>I4H
\ Seeour ,
in theRrst News Sedion
USE PILOT B BATTERIES
dan be, tappeii at any vollage from
" lo T'JH volts.
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i?ept. 1>. 115 SoutU Fifth Street,
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riONs and- oOmf
tiumi* r?4?nt At
rorm-.vs A KiiK'.ne#r*.
t'atl er wrttu. KKEE