Jmenca 9orem osi

100 Pages·2014·9.2 MB·English

MARCH 1924 25 CENTS
:kafures
in this Issue
The Shenandoah
!l Radio's Service to Aeronautics
_A
Colpitts' Push -Pull Circuit
Jmenca The W. cÁ. 3-Tube Set
9orem osi
A good, practical receiver
Easily controlled
4view" rack Barnsley's Story
&adiophonc
How his radio set got the
"Bowdoin"
www.americanradiohistory.com
the
of
indowTrimCon est
held during
National tube Weet
..
September 24ík to October 1r 1923
CUNNINGIIM( TUBES'
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CHaeLsnetsne er'psA inRn gaHedlaeiorsd , wShaoCrpeap leCif..o mpany. . . 51000 -First Prize ainllgTo htteethrdee tbtooe tiatnhlg e aatwm otoi eud netf aolroe fr ss, t,h loeh a prptliaart,enp.sa titnhfrego msio nm 5e5th .0ep 0o0tt ieet. o h ian1sc 5r.eb1ae0es0n-.
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(50 HONORABLE MENTION
DealTerhse fofor rtew ianidee rsp rizoef s Haos nostriapui.l atMede ntiino nt:h e rotes o1 the Contest are awarded to the follow .nd Cunningham Radio Tube
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ISS2He aSo weFwer e0ud1s 1Stawtre*: et Iba WeMst Laatkee Street 30 CNheuwrc hY oSrktr eet
www.americanradiohistory.com
THE WIRELESS AGE
1
i
PHONES
Imported
give you a new radio set!
APAIR of N & K Phones on your old radio set
work a complete transformation. They make
it sound new and different. Never before have high
or low tones, loud or soft tones, come in so clear, so
mellow, so free from distortion.
N & K was designed by one of the world's foremost makers
of telephone and other scientific apparatus. It was designed
especially for telephone reception, whereas most radio phones in use
today were originally designed to receive telegraphic spark signals.
The diaphragm is larger and more sensitive, and is placed at a care- et Tie World
fully measured distance from the poles. Even the sound chamber With N& K"
is differently arranged. The workmanship lives up to the world-
wide reputation of European precision instrument makers.
Last year this head set was submitted to hundreds of American
amateur radio stations. Out of these 90% declared it to be the
best head set they ever used.
Famous for comfort Every user of N & K Phones comments
immediately on their comfort and the way
they exclude outside sounds. This is due to two things -the extra
size of the phones, covering the ear completely, and the leather -
covered head bands, which have an additional sanitary value.
You shall be the sole judgee N & K Phones are sold by
leading radio dealers every-
where. They are sold with the understanding that your money will
be cheerfully refunded if you do not find that N & K
Phones reproduce more naturally, give clearer, mellower
tone, and fit more comfortably than any other head
set you care to compare them with.
Dealersf, read this f Won ea anuyt hNo riz&e Kyo uP htoo nesf urnedt urnedm oaf tenery
the above test. We will exchange or replace any that
come back to you. Pending the announcement of jobber
distributors, we will fill orders direct so that dealers may
be prepared for the increasing demand for N & K Phones. They
come packed ten to the carton, each carton containing an ample sup-
ply of display matter and literature. 'Wire or write your order today.
N & K Head Set, Model D, 4000 ohms.
Nit keled brass sound chamber, 2'/ a in. diaphragms,
hard rubber caps, leather- covered bands, six feet
of cord. Retail price, $8.50.
TH. GOLDSCHMIDT CORPORATION, Distributors, Dept. W3, 15 WILLIAM STREET, NEW YORK
When writing to advertisers please mention THE WIRELESS AGE
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Vol. XI No. 6
MtJ:/^
_,.
March, 1924- Contents Your (Authors
Editorial Chat 14
RADIO and the Giant of the Air, By William A. Hurd 17 A It o'R t hIiLsL n-Wu m IbNeNr EwRas asse ac ucroedn tirnib Juatcokr
Pictorial Section 22 BSialernncslee)y. , Tohfi sq aBmPa t(eRuard oiop erBarteoark osf APrricntciec
Radio Breaks Arctic Silence, By Jack Barnsley 26 Rmueprieterdt. faBmrieti sbhy Creoceluivminbgia ,t heh asfi rswt omn esa-
I Am Radio, By V. T. Miller 29 staicg eesx tpoe bdeit icoanu gahnt d frboym MseravciMngi llfaonr 'ss oamrce-
Oh, It Is Too Much Radio! 30 twimithe acsi vtihliez saotiloe nl.i nkH ceo nalnseoc twinogn ththaet pparritzye
A Radio Operator Sees the World, By W. S. Fitzpatrick 32 othf ea C hfiincea gore cReiavdiinog Laapbpoarraattoursy .o ffeHriesd abry-
Colpitts' Push -Pull Circuit Kills Distortion, By Samuel C. Miller - 34 otiwclne ipn atrhti si nn utmhibs evr.a lusianbclee iwt otrekl,l s hoafs hains
What Causes Fading? By Dr. Alfred N. Goldsmith 36 asplmiroatsito rno mtoa anltli cw hfloa vaorer ainntde rwesitlle db ein arna diino-.
Design of Loop Antenna, By Ralph Botcher 38
PWeeilpl sS hinotrot BWroaavdecs aRste vSotalutitoionnsi ze Broadcasting? By W. W. Rodgers 4309 SouArP MruelUal dCEeiLrrsc Cuwi.th )Mo ihsIL awvLeeEl la Rdkmn (oiCwreondl p tohitit ssm 't eaPcnuhysn ohif- -
Humor 43 cFael barrutiacrlye s niun mpbreerv ioheu sc onunmtribbeurtse. d I"nH tohwe
World Wide Wireless 44 tgoa iDneesdi ghnis Ifnidrsut citnasntcrue cCtioonil si.n" rMadrio. Mwiollrekr
Broadcasting Station Directory 47 dDuurriinngg f tohuer yweaarr sh es pwcanst wa itsheDcorn.Dd-e lFieourteenst-.
World Wide Broadcasting, By C. S. Anderson 49 asingtn iend tthoe tAherm tye cShignnicaal lC aonrdp s taensdt wdeaps aarst--
Amateurs Shake Hands Across Atlantic S0 jmoiennetd. thUe porens ealercahv indge patrhtem esnetr viocfe thhee
The Wireless Age 3 -Tube Set, By John R. Meagher 52 cRiaaldizieos CIno rtpheo rdaetsioignn o fo Af ampepraircaat.u s.H e spe-
Make your Own Loud Speaker, By Max Abel 55
Improve Your Set, By Edgar Terraine Johnstone 56
SRoamdieo PErnagcitniceaelr iRnga dio Hook- Ups for the "Build- Your -Own" Fan - 65o8 oiWdf ewnhtSiifcie.he r daFh tewoI Trsit pZhSe PneretaA sdaT iso tRha IefsC iefWaKt e-oe gnro(lA idn y)g eR ahaoradpss,ie o re baiOgteoheprnt.
How to Tune Out Local Stations, By C. W. Horn 61 Irna dhiois porpeesreantot rpso siint iotnh eh ec oinutresrev ioefw as mdoarye
Mount Instruments on Sub -Panel, By Milton Lock 62 ethspaenc aianlyly oftihtteerd p teor sdoisnc. usHs et heis , otpheerraetfoorrse .
problems, as in his article in this issue,
New Appliances and Devices 64 and also give us an insight on the doings
of the operators, as reported by him in cur
Industrial Inklings 70 Wmoitnht hthlye Ofepaetruarteo, r,"" Awflhoiacth tahnrdo ugAhs hlaocrek
Information De ',k 74 of space is omitted from this issue. ì
Amateur Radio Stations of the United States
96
1
PUBLISHED MONTHLY AT WIRELESS PRESS, INC., 326 BROADWAY, NEW YORK
uLYnOdeSearr lyAt hNes GubAEsrLctC rEiopoSfte, i noM Cna PAruciLnbh I lFl3xl.,', h. e1nS91. 75 59l. A' oS..,o C. 1o2Sp.p5yr0rii n-gOgh tu,S ti1s.9 i2d4e. CUWH. iIrSCe.lA esGAWs O.,Ph , ree$eIs3Llse.L,0r 0.,;AI n cM.NS iaenrrWgotlhuehre estnptCe o supBibelsdscg, r.i p25ti ocne netxs.p 12iEr -en1s3t e yroeGIudlR e wEnaArisll lTr slI tenacdB o nRSadI I. T r.c eAlnaLeIsNwos na dmlo bnel nanekr Oenctc.l o9s,e 9d71. 91C3R.l eatruPernoncs et wOASifttfhU.i, c Ser,TeS mRyNdAietntwLeay nI,AYc eo Nrkp.. roSNm.. ptWYly....
MJaamjoers JOe.r omRee sWto. n'H. owPere, s.E ditor L. MacConnach, Seei. JohnG eRo. rgMe eSag. heDr,. SToaec,ah,n icTarle aEtd itor H. L. Welker, Adv. Mgr. C. S. AnIdI.e rsIoLn , RAebsesor.c iaRteu s.E Mdigtor.r
Bomfofe er cscalatousnns yter oofvs ceteaarrstpteyapm ianIern an tstusiss ice olmef tnoetuionptpil sykceiidanr nc dlieon sr exawppniardrree tsliessiisnaos nn sth seiexgo pfnm raeolusipsrntiigoan,,ni osn et hiIetfhf reosormu wc nhno cewor ssrh rooearus nplddIo n n dpatetuh nbetla .in syhfua entrustdi rm e eoo ftah anepdtrph sei stao ar p np sheoaeagmrreoeiinntniigm.s ee .I.n t roItnehvletoslrleve elyc o qluaumnedsn tsio efmnrosp mh oaftU icmpalreli yo troit dyit simcloeaf i mmI navyae nnybte io pnrf oieuaPlnntrdydi n ttooet rdh b ee rI necs otphUmoe.pn sasuSirbba.l tieilvtiA-te{y.
THE WIRELESS AGE is member sf the Audit Bureau of Clreulatlons.
Japrz-"I
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MARCH, 1924 THE WIRELESS AGE 3
Amrad Radio Unit, removed from Console
Cabinet, to show Bradleystat and Bradleyleak
mounted in front of detector tube
Amrad Adopts Both `Bradleystat and `Bradleyleak!
The Amrad Jewel- Italian Renaissance Period Art Model
Is Now Equipped With Ultra -Fine Tuning Control
ALLin colfu dthine gm thoere beexapuetnifsuivl eJ eAwmelr aCd ornescoeliev inmgo dseeltss,, YbOilUitiRes raanddio nreewc etihvrinilgls sief t eqwuililp paeffdo rwd itnhe wB rapdolsesyi- -
altehraeek snn!oo wisTe hleeesq su niBopirpsayed dle wywsirtieatt h.r hTeBohrseatd aoltesldy hsttayavptsee agofni vdge rniB dw rlaeadaylk e ytios- stathnaedt s w thaireneyd r hinBevoraasrtdailatesby lloyef a rrkeesac.d oymM -mbaueninlytd s retathsde iwmo i tdhtoe aBslreeart dsb lerueyiplsdltaaectrses,
replaced by the stepless Bradleyleak. The perfect fila- who seek the best in radio.
ment control of the Bradleystat means greater range The Bradleyleak has the endorsement of Amrad, Flew -
and louder reception. The stepless grid leak adjust- elling, Kennedy ,Crosley,Clarkson,Cockaday, and other
ment of the Bradleyleak, from 14 radio engineers. It is pronounced
to 10 megohms, means higher tube "the perfect grid leak" by all users.
efficiency. Get the benefit of the graphite disc
The Console models, with self -con- design by avoiding all substitutes.
tained loud speaker, battery com- Carbon or metallic powder was
partment,and highly perfected tuner, abandoned, years ago, as impractical
are made more selective with the and unreliable. Insist that your dealer
ultra -fine filament and grid control, supply you with the genuine Brad -
so essential for long range reception. leystat and Bradleyleak.
Send for the latest bulletins There is no substitute for
on closer tuning and per- Electric Controlling Apparatus the scientifically- treated
fect grid leak control graphite discs
283 Greenfield Milwaukee,
Ave. Wis.
THE ALLENBRADLEY CO. HAS BUILT GRAPHITE DISC RHEOSTATS FOR OVER TWENTY YEARS
When writing to advertisers please mention THE WIRELESS AGE
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4 THE WIRELESS AGE
MARCH, 1924
3_. 71
($127.50 west of Rockies)
New Kennedy Radi® Receiver, Model V
Simple to Operate-Selective-Mechanically Excellent!
This new Model V Kennedy Radio Receiver has estab- Mechanically, Model V bears the same high stamp of
lished a high standard of tuning simplicity- combined excellence that has characterized Kennedy Receivers
with the same precision and selectivity formerly during the past twelve years. In every detail of con-
associated only with the more complicated Kennedy struction the highest standards of precision and
models. Added to this are all the characteristics of accuracy are rigidly adhered to.
mechanical perfection that have made Kennedy "The
Royalty of Radio." Model V is an exquisite piece of furniture. The cab-
inet is of mahogany, hand rubbed to a beautiful satin
Anyone can operate this new product of the Kennedy finish. Its proportions are pleasing. The highly pol-
Engineering Staff. After a preliminary setting has i-sihtesd black Formica panel lends an elegance of finish
been made, tuning is controlled by a single dial. height and angle have been established, after
Dial settings are always the same for a given station, much thought and study, to provide comfort and ease
regardless of where the receiver may be operated or in tuning.
the kind of antenna that may be used. The price of Model V, completely equipped with all
tubes, dry batteries and individual Kennedy 3,000 -ohm
Model V is particularly free from "re- radiation." It phones, with plug, is only $125.00 ($127.50 west of
reproduces music and voice with unsurpassed purity Rockies)- marking it as a feature value in radio equip-
and operates on any ordinary antenna -outside type ment. Other Kennedy models range from $285.00 to
preferred. Embraces the entire broadcast wave range. $825.00 (slightly higher west of Rockies), completely
equipped, including built -in loud speaker.
Selectivity is one of the outstanding features of this See the new Kennedy Model V at your dealer or write
new Kennedy model. It will clearly differentiate be- us direct for fully illustrated literature on this and
tween distant and nearby stations only a few meters other Kennedy Radio Receivers.
apart -local interference can in most cases be elim-
inated as satisfactorily as with older Kennedy models. LieeneeAd! !u Knednenr eAdrym rsetrcoenivgi ngU s.Set., aPraet erengt eNnear.a t1iv,1e1. 5.149.
KETHE NCOLIN B.N KENNEDEY COMPDANY Y
SAINT LOUIS SAN FRANCISCO
When writing to advertisers please mention THE WIRELESS AGE
www.americanradiohistory.com
THE WIRELESS AGE
5
E men who developed
Ti-I
radio used the Navy
Type headset for their
delicate experiments.
Its fine construction, snatched
tone and shielded cord caused
them to single it out as the
one headset for truly accurate
work.
- -an
The shielded cord ex-
clusive feature eliminates
"cord capacity howls." The
leads are encased in a metal
dlatched ?one braid that is continued to a
third terminal -grounding all
metal parts of the receivers
and assuring purest tone.
Radio Headsets All Brandes products are sold
under a money back guarantee by
reliable dealers everywhere.
.....«...
.
Shielded cord opened
to show construction
When writing to advertisers please mention THE WIRELESS AGE
www.americanradiohistory.com
6 THE WIRELESS AGE
MARCH, 1924
San Francisco Hears
Japan and Newark
on the
DICTOGRAND!
Th. Master The "Aristocrat"
MInasdter umtheen t RTechoartd Dictograph
W6i 0 (g0 i e1x. trOa pebraattetesr ies.w ithout Headset
gao r c2o. nAtrdojlus stvaoblluem e. d i a l 1. 3,000 ohms
VVi 3. Handsomely com- 2. 10 ounces (A'one
a° d pact in construction. lighter)
1cre 4e.b oFniyn;i shseedt ionf f a byr icha 3. Head -8t headband
\ YA OV \CC YCatocS`5`aet5'tOec\eea5Se aeT\Ce9ca `a°góIb - y go5.nl i sFtteuhnleli ynbO geg Nllus.L ialrYvae nrteede dr.i m 45.. CFiupanpinies d-chc eeuosdrr av neignde ebalarc k
ao° eeoetm $24.50 6. Guaranteed fully
Coñ ootJJ óJ a yeytea ett <ta aoy Coò..n e0° tton , Ready to Operate
ancd óc0 n¢Q `tbtr°t o9s aa¿ taé er g\Zae° a ea °cQ ° ey et aanda eo° tae tt
9a
$
2.f a tea an°by RaO G abat beet.
t\ ttctcó°Q` \ ea3g me,° tR O tttst tetamJe aat°at°c0° aata tboe\9
n FCbt4o ttics `ate a~° ctn0 a nA cCto°J Chteha° t °botettn t
From the 0tit p Jtot°ab`aACtl a.ea\,tSt\a tott "a` tb°t aa e tabta ontt tóa\tcot a aaaayt\ neçOog etgp <ettt sy aa oy o tt nE avgC[ tb a,q 1t1m\ eoaagae<, at rb as
San oFf raDnecciesmcob eCr h4rtho nicle ó J <`s`` Jgéne 9`n be'*a\atatotA 9en FREE
\Sys Nc stn nn°n`1
' at ton `. at a aa t ar topa
Voo
WsHpeAaTk er!a sTuhpee rb inslotruud- twhea s 4 ulnisdteernsetorso-din ! distinctly by "Applause Cards".
ment that broke all records Why not get many more
bfaruyo dmirb elpe fraolrod uudca winsagpy e afkaJeairnp ta vnos ilguwnmaitelhs! dsgpiesetttaaiknnegtr wpthoiatihnn ts yyoouou nr arepa r elnsoeounwdt "eann-jdo Sytetadetl ilo tnh Ue lKsa tr-eCtir s- tLs '- Xp rosiggrnaimn.g wooffn. 't yIofu yowur iteh avIne
By all meant" Quickly and easily with "Ap-
equipment? Get a Dicto- plause Cards. They're handsomely printed
Clearly! With such clarity grand today. Tune in some mYoauirl incgo mcmarednst.s , Aallslo ,r eaadnyd fdorro py ouIn toth en ilm aInll wboitah.
ttwhaete nt hiths e ceonmdms uonfi cathtieo ne abrteh- ydoisutra ndte apleori.n t tonight. See KYNoeeuey p caarne puFsaRec Ek "EA opfA plTtah uesmYe OCUnRaear rd RsA"y oDulIriOb e rreaDclelEiyvA inLbgeE cRas'uSest.e .
"Applause Card." were originated by this
Company, makers of the popular Dicto-
T"hPeh oDnioct -oUgnraitp"h gDCplraaiacrupdtsohseg " raC Lpahoaru rdeds H. "eDSai dpcsteoeagtk.r earp hT ahneCd o poyntrhliyeg ht"eAAdr pisptolacuraset
My21..o auHkUrea ssesp s h aaon dnoalo opegutxredatr rpsash p t!obe aafktittee rar ineoysf Adawnee a darb lydeisowgr "u 'esr'F. l lR dfhEerOeaElrepl e , rip'tYsp a orcuehk pea agihedg, a,,es o. n fed nritooDrhetue ecsmpy t,te .st u appFwsrp to-aol3yidc.t sdk oeefddy .o "uwAy oraDiuttp el ygsuoiuvauses.r
3. Atmtaackhee do fa npdh odneotgarcahpehd D I CT O G RAP H
in a moment PRODUCTS CORPORATION
4. Calibrated dial on back
controls volume 220 West 42nd Street, New York City
5. Finished in nsckel
6. Fully guaranteed Reg. C. H. l'et. Ort
$10.00
When writing to advertisers please mention THE WIRELESS ACE
www.americanradiohistory.com
THE WIRELESS AGE
MARCH, 1924
F A D A "ONE S I X T Y" N E U T R O D Y N E R A D I O R E C E I V E R
Selectivity
The FADA "One Sixty" radio re- The FADA "One Sixty" is a four -
ceiver is known to thousands as the tube Neutrodyne radio receiver. Our
greatest triumph in radio engineering engineers have found by exhaustive ex-
down to this very moment. It meets periments that the FADA "One Sixty"
all requirements for simplicity of con- with four tubes will produce results at
trol, selectivity, volume, clarity and least equal to those of any five -tube set.
ability to bring in distant stations. - This means economy in tube and bat-
Its selectivity appeals to everyone tery costs.
and to the women folks in particular. In appearance the FADA "One
You can tune out local stations, even Sixty" is an attractive piece of furni-
when several are broadcasting, and ture. Installed in the home, its chaste,
bring in distant programs. Or, you can handsome cabinet harmonizes with any
tune in any local station you wish and interior. It is a quality product through-
not be bothered with interference from out. Made with all the care and skilled
the others. workmanship that have made FADA
After any station is picked up with products noted, the "One Sixty" is a
maximum intensity, notations can be radio receiver that anyone may be
made of the dial settings, and if one proud to own.
desires to listen to the same station
again it is only necessary to reset the Price, exclusiv-ea to f tubes, batteries
dials in the same positions as recorded. and phones, $120 all dealers.
F. A. D. ANDREA, INC., 1581 Jerome Avenue, New York City
1F_A&DA_
Radio
When writing to advertisers please mention THE WIRELESS AGE
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8 THE WIRELESS AGE
MARCH, 1924
Founded 1892 Specialists
HENRY M. SHAW in
President
Moulded
FRANK M. SHAW
Vice Pres. & General Mgr. BAKELITE
and
"Shawlac"
The Guarantee
of Quality
The radio buyer of today is not the same
man who bought last year.
He has had a more intensive education in
this field than he has ever had in any other
line.
HYMAN BESTONE Vario- That's why, when a customer steps up to
coupler Insulation by SHAW
the dealer's counter he asks questions that a
year ago, even the dealer could not answer.
The insulation used in radio apparatus
is one of the most important factors in the
efficiency of operation. More sales are de-
termined on this point than is generally
realized.
To help the manufacturer identify his
apparatus as incorporating the best there is
to be had in insulation we will now mark
each piece with the mark.
PACENT The radio buyer has come to know that
Plug
Insulation Shaw insulation is without a rival.
CARDWELL Transformer by The far -seeing tmhaneufmactuarerr kwi ll appre-
Insulation by SHAW SHAW ciate how much will do
AMSCO to reduce his sales resistance and act as
Rheostat "The Guarantee of Quality" on his products.
Insulation
by Our sales engineers are at your command.
SHAW No obligation is involved, and an interview
will be arranged upon request.
WESTERN ELECTRIC SHAW INSULATOR COMPANY
Socket
t 150 Coit Street
Insulation by
SHAW Irvington- Newark, - - New Jersey
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