i -i -w ;,. v/ , . '-i!`` / 1_ *I, .;,¡ s''4 .1 _. o 4 PR' This Issue Contains Up -to -Date List of All Godley, L. M. Cockaday Broadcasting Stations and Others. American showing Schedules, New Radio Relay League Sec- Wave Length and Kilo- tion, American, Cana- cycles, 4 Large Radio dian, English, French and Maps, Distance Chart, Australian Amateur Log Sheets, "Hook up" Transmitting Stations, Section with Construction Complete List of All and Operating Data' on Government Radio Sta- Neutrodyne Four Circuit tions, Kilocycle Meter Tuner, Reflexes and Table accompanied by others. Articles by Paul Explanatory Article V V 50 Cents in U.S.A. FOREIGN 65 CENTS COMPILED FROM OFFICIAL SOURCES CITIZENS RADIO SERVICE 'BUREAU, INCORPORATED 508 SOUTH DEARBORN STREET CHICAGO, ILLINOIS s U. S. A. r.,. L *moor Tubes fqr Every Requirement Vacuum tubes are used for two distinct individual purposes in a re- ceiving set -as DETECTORS and as AMPLIFIERS. The qualifica- tions of a tube for these two uses are so different that for maximum efficiency tubes of entirely different design must be used. This point was one of the chief considerations of the research engi- neers who designed Cunningham tubes in the great laboratories of the General Electric Company. After years of research and experimental work, the Cunningham C -300, a SUPER -SENSITIVE DETECTOR, the Cunningham C -301, a DISTORTIONLESS AMPLIFIER, and the Cunningham C -301A, a LOW FILAMENT CURRENT AMPLI- FIER, were developed. These three tubes, now nationally recognized as standards for all types of receiving sets, are responsible for the highly perfected results obtainable in radio phone reception. TYPE C -300 TYPE C -301A T1sh et hter adgeu armanatreke GoEf Saper- Sansttiva % Amp. Fil -Chunt tEhaecshe tuqbuea liisty butuilbt esto. DETECTOR Amplifier and Detector most rloid specifica- tions. Patent Notice_ tubes Cuanrnei ngchoavmer ed by poathteenrsts issduaetde d and1 1 -p7e -0n5d,i ng.1 .15L -0ic7e, ns2e -d1 8 -f0o8r aamnad- teur, experimental and entertainment use in radio communication. Any other use will be an infringement. Home Office: Eastern Representative: 248 First Street 154 West Lake St. San Francisco, Calli. Chicago, Illinois 7. r iliwcn.c Radio Call /fuul, ¡ I ' HOWARD New 25 and 40 Ohm Rheostat Micrometer Rheostat i,,, July in, Multi- Terminal Plug 6v2 Ohm Rheostat $P1r.i1c0e The most simple, smooth and efficient Single 2450 OOhhmm RRhheeoossttaatt 11..1100 KAnuotobm Catoicn t-rionl stVanertnaineer oRuhs eostaadtj uins tmexeinstt encoef. either main or micrometer portion. Price Power Tube Rheostat 7 Ohm Micrometer Rheostat $1.50 25 Ohm Micrometer Rheostat 1.50 Ohm Micrometer Rheostat 1.50 Potentiometer Patd. August 28, 1923. Makes Posi-tiv e contact for 6 pairs standard Phone Tip : Series and Parallel, operates with Maximum Electrical Efficiency. Price $2.00 fIrs:: The above rheostat may be used to control th+e filament voltage of one 5 watt tube or tvfo amplifier tubes. Rating 1.6 ohms 2.5 a pores. Price PrI ice $1.50 200 Ohm Potentiometer $1.50 400 Ohm Potentiometer 2.00 A4EsvLkeWr yyA opYuirSe c Dew eiactlaher ret fhuteol lysGh UoiwnAs RpyeAocutN edTth EiasE nd deo pfm eSnaAddaeTb ItlSoeF pAPrLCoEdTuAOcSRt EYm tahpdeee r bfoouf rymtehrae nhlcoiego.hk einstg gfroard ere mliaabtleer iamlse rbcyh asknidlliesed. laSboolrd. 1 WRITE DEPT. K FOR OUR FOLDER, MAILED FREE OF CHARGE. HOWARD RADIO COMPANY Inc 4248 N. Western Ave. CHICAGO, U. S. A. sip LIBERAL DISCOUNTS TO JOBBING AND ELECTRICAL TRADE. WRITE US. Tell 'Ein You .Vas' ll ihr Cilis u.c Pon!in Cull Honk . .x .511Paía.,2:'41: 2 Citizens Radio Call Book i( r .,/¡sR vfi-i.+,..J-..----;..-- -J i. c.. f.'-1..-i F..w= ^r. `C,_.! r.r.r-.-O. .-..r .,. i-S ri--f:<.J,1 -,, - RO5T-ftADlO ON this page are shown six new items that will interest every radio fan. All are of the same high quality which always has distinguished FROST- RADIO. We wish to call particular attention to our No. 607 Tube Control Unit -the only combination on the market of rheostat, with vernier, and potentiometer, in a high grade bakelite assembly. - FROST -RADIO Bakelite No. 620 FROST -RADIO No. 630 -FROST -RADIO Spider Dials Potentiometer Switch Resistance Unit MtbsptoBS6soy1ohvtlep oep5rteasiu lhaebddrft3c e ss tee1 ) ti.rae dn8i i ion6nnp D0gA0ncfa pd rcich.maloee. i c dnlgmaSe ueeSrr(lp ersa p bpa5ienmadliwrtadsc,ere a,cetieorrlutykrre h rkr aeat b5iydDndán aapi igdivnklaiefsln ig erdl .oc lomeifihmstrudeoN e rs maco ihn ah.aa 6atnrapllo1oalefd npt4 rdf)1 i ta dc0 ie5crt20ea1ooa xa'4sl2cp t ilri.us go iciigstnnanioiNn nhccnentiohhgtddns-.. MchpSiaosoaoan uanvntedtdee.t dla enissm c Ntbttifboieiornulaom l af mt6ftakete2ee e0ndtrde ed.iFPe pr ows onAtr,octh mie ci sernbnkiicnnceeteui ac wolcpi e tmp uo sldttwaeahe rvtotenraeeaiuetinrdinitt ol k, Sa o mmolbwefwn etl,eieh ttitecte ebah!hr fnal co atip5rtbIr bes0car eulraurici.snte suisetgss,t,. WdtvlrCohrsouaaaeariabws nhdssrpntegii eeiaanr poseebnrr br , etdeo clhvfoe a tveoehm6f en a l ifUtd wssloeasvw o nuaogiioncmhhni tetkuldota tt.meeo r i2 nnetd b5eAb.dg, e ua nuboryA..s tmsns a te eqelr aR tpuelurhmynsyaesa ecep nisosl ediieoivttnsss aylapt,e i a n tbuutw.bpnhc llseaarc eeeos dreN do decwr,u,ov ,yuu e3n.i cr art5brrihht6 nt e a,3we deo ne0tow hnht vties mtitReifcit rtorraiehshyseyr.t- NMlrwctniehtoiaoeciremtdi.k hoa ceeps 6lo stlaot w0na cpfut 7ttolmsr nao -we TetakFldes irnut dkosRhotbn ho bovakeOnr obennc bsurudoSCna.g rn eTilokheetCfrenford o-io,cl uRt llmab.tirte eoA.nibnn T,dliwcFdDnh yUpieiientt.Istoh Ogen lt a edbiFi nstpn lBi a ntowt ocieawsonkiksttmeos hteb . re udlamfitik Antevaeieinerlt-- l, NAicNacoonousupnegovsrte a . eeee rsitslrxam6 yee stt t3rtdbiswhane l1 eetmgiwttt- da ocheFi w chrIoilgeyhnRan ihw t eldhlhOe wpdiu aston ohStctnpleo.iu dtsrTw snaehyuEi d-cnxe wnnRui dcspiaan tioeAo.obbvin tnliae enUDfF kobstisnoer Inla e nlsiOuiikants tes eneght nes dtlB eph ii ttnnwahseas o.nart k owoedwetpSu ulala,sngibsipl vtkoeehitees -t-.-- NAmbrlbApheeoaai vnoahslnkeefr.daieee o rs6nia allnoti da5ttatgnmetusn4an orbpde c-kecm oathnF kheskeomnoot RePsb odfwlep, .oib O t tnonieht.ro tteieW icSe fsfHan,r kn anTomatewtmdiupisloo o -i onepltumRtmohtdh lneaaceAr tneneatiwstentdetDetmiedigi r onbt Ir o,khmwag lO.oann witetcubd thithkpBrie et-l eppshwrtagot ood k oe ll iseingmisrsbsilk runhrihaaieatiegnehnidlsndlgpdeeees.- controls work with extreme smoothness. lengthsto tune sharply. Every set owner tain in desired position. No. 654 Bakelite AB avkaelluitaeb Tleu baed dCiotinotnr otlo U annity $ 1s.e75t.. No. 607 stahnocuel dU hnaivt e$ 2o.5n0e.. No.631 Bakelite Induc- PBaokteenlittieo mPoetteenr -t4io0m0e otehrm,2s0 -08- 410.02 5oh. mNs o$.1 .62555. 154 WEST LAKE STREET, CHICAGO 30 CHURCH STREET, NEW YORK CITY Tell 'Em You Saw It in the Citizens Radio Call Book Citizens Radio Call Book : .`.v 1 '..6?=..:i 4.'Mva`!.:v=-s.=- .íi: :%.`....3`: :.1.F= _ FROST FONES No. 161 -2000 ohm -$4.00 No. 172- Maroon Bakelite Shells No. 171 -3000 ohm -$5.00 and Caps No. 162 -2000 ohm Aluminum Shell Type 3200 ohm -$6.00 Composition Shells and Capa $5.00 111 The FROST- FONS Line Is Complete IT is a pleasure to call the attention of America's millions of radio fans to the complete theF nRaOtioSnT's - FmOoNstE p olipnue,l aar sh eilaldussetrtas teind thabreoev eg. reHaet rtey piens ,o neea ccho tmhep rbehesetn soifv iets l icnlea sws.i ll be found The new No.172 -3200 ohm genuine Bakelite FROST -FONE, in rich maroon color, is destined to be the greatest head fone value in America. Shells and caps are highly polished genuine imn,a aronodn th bea eknetliirtee. hIena dth sies t froenper ethseen utss uhailg h"elesat dq"u awliitrye so af rceo enlsitmruincatitoend ,a tnedrm eixntarle mbelo cske niss itmivoeunledsesd. Ftioonr , tohuors e Nwo.h o1 6w1 -is2h0 0th0e oehcmon, oamnide sN mo.a d1e7 1 p-3os0s0ib0le ohbmy thfoen easl uamrei niudmea l.s hHeallv ety pheig hofly c opnoslitsrhuecd- drawn aluminum shells and composition caps. No. 162 -2000 ohm fone has composition shells and caps, reinforced V cord and rugged ter- minals, as well as new type terminal blocks of sturdy construction. These three types of FROST -FONES represent greatest value for the price paid, give you highest quality and utmost sensitiveness for radio reception. Your dealer will show you these fones and explain how their high quality is guaranteed by the name of the maker. JERBERT WT KEET, -- H. FROST, Inc., 154 LA E CHICAGG O > 30 CHUESRCH STREET,S TNR EW YORK CITY b Tell 'Ein You Saw It in the Citizens Radio Call Book 4 Citizens Radio Call Book 0 fr RA 1 D FROS IIQJp, AI i A O .11 111 11 11f p0 VE0R 14 ,,. 'IiIttV V 1 RASES Tr, rbj/ i. 'MIL V y/ e '1, 'I I J o t'' No. 600 -FROST- i ' ' ij I ki RADIO Metal Frame , PoRtheneotisotmat eoter r , !i l' I 11 Equal in operation to the best molded No. 601 -FROST -RADIO Metal t tmypoevi,n wg itDha rptsr eacnisdio gnu aorpaenrtaeteiodn reosf isatl-l The dawn of a new Frame Vernier Rheostat (,tsnriAf )i CCttppmassaieaohnneedo nnegct nnalhedeee osttelt err ltnes aati wdp ob llp o rikragpafmmne nsirov.evseoo eb,avluu .F e rnaannyr nWnittaciriitdnnnsmikag aggg netsienul idhc dtr ptkehic nhsletori iiahmscnlnmt e kpegbsp nadl tlcarderew oouteas ehnvcw nsdeitt.ddoai in otpf ec h fnomFtdho il ernltoubaoomatutorc eemvneeftridyhd--t.. eOrNa Eci hnfoa renrvadedri IsiiSno1i imn nnaggni ye rci-ti es, wwSNpakfl neraooiestocm.rhi ctbknse 6i.igs n 0sqild0poegu eAe n saM c wvipligiaeeitinrelyrt e can.tt yya eli ebppn Fryeeod r fvvaa cmaeermomeprrnnnaepo siin aeevrtsorreRrr ua,,tr aho tcwtutefhte hisoaeod is cn rstthha abma natygg,sog t ii oevvobthtree uuheess-rt. r10 No.6 06e0 0 Metal Frame Rheostat 6ohms and going fast in others, is No.s t6e0t1 6 Mohemta l7 5Fc rame Vernier Rheo- `á1 NNoo64.. 00660c00 2o3 hMmMestea t6la 0Flc r Farmaem eR hPeoostetantt i3o5m ohemtesr tNhoe sRigenf uwnhdisc ho sr taEtexdc h`Panogsietsiv e'o lny No.s t6a0t4 35M oehtmal 7F5rca me Vernier Rheo- v, , No.Z o6o0 -54 00M oehtaml s F60rac me Potentiometer Radio Purchases." You now buy ti _ /. " ; ,<,,, radio with the same certainty ,'_ ki of "satisfaction or your money 1 back" as you do any other staple merchandise. oft, y The broad guarantee placed on FROST - - h1 RADIO by the manufacturer has been - ' in large measure responsible for this 10 1 improvement in the sale of radio. Every t1V Frost Dealer knows that FROST - ` RADIO is sold under this positive - guarantee. It must be right, or it could No. 651- FROST -RADIO 11t No. 6B5a0k-eFliRteO RShTe-oRstAatD IO not be guaranteed so strongly! OneB oafk teheli theig hVeestr ngireadr eR rhheeoosstatatst on ' is, UbTisahn sseiite m,od eirIlnfsar airgt mhntoa eo tf o, autithnr idshNb aholsai.g c6mhk0 7apg rorToaluiodsbnehe e rbhdCaebokboaneasktlktiretaeoe-t-l .O. OrdUerr defraolmer hhiamnd lteosd aFyR, OanSdT -l eRaArnD ItOhe. lkleitnveoefbrrma,. maHprekoael,siwst histemhMd ob aoldantehci c k-ko wepnlo o mlrikpsailhnareotgedo dbnv aekbbrearnakliiseetes-r "' lmiteo unkntionbg. wAitrhra nlogceadt infgo rt ipsi ntog lein -shuorlee depPe ndabilityY of this apPpP aratus. pkonluisrhleedd . poOsntse, oafn dth en icrkheeleods taptos inwteirl,l position on panel. Smooth -working improve the operation of any radio set. i lever and moving parts. Fluted knob: ` C nickel plated pointer and knurled bind- No. 651 Bakelite Vernier Rheostat 6 inn posts. `/ ohm $1.25 No.650 Bakelite Rheostat 6 ohm, $1.00 No 653 Bakelite Vernier Rheostat 35 i i No. 652 Bakelite Rheostat 35 ohm $1.00 ohm $1.25 `t 1 HERBERT H. FROST, Inc. 154 WEST LAKE STREET, CHICA-w l' ) , 30 CHURCH STREET, NEW YOes'K CITY I1l 1lA F, 7'c /l 'Ent Voti Solt, It in the (-iti.'7ons Radio Call Book 4: Citizens Radio Call Rook 5 `lî::.r: 'sf:: í(c::...:.=s+'s+.-'` -..- FROST-RADIO diASOLOP On this and the following pages you will find a complete showing of the entire FROST- RADIO line. These quality products, because of production in huge quantities by mod- ern precision methods, offer you greatest value for the price you pay. Note particularly the new vacuum tube sockets shown on this page, adapted for panel or table mounting, and supplied with non -microphonic shock- absorber mountings for no more than others charge for plain sockets. No. 611 FROST -RADIO Bakelite Adapter for C -299 Tubes 50e No. 124 FROST- RADIO No. 139 FROST -RADIO Neutrodyne Jack 90e Cord Tip Plug 50c 311E14' IO1=1P -11111 No. 137 FROST -RADIO NNo.e 1u2tr5o dFyRnOe SJTa -cRk A9D0eIO NRSooA.c Dk6eI1Ot2 5 CF0 6-R2 O99S T - Cord Tip Plug $1.25 No. 617 FROST. No. 126 FROST-RADIO RADIO C299 Neutrodyne Jack 90e Shock- Absorber No. 312 FROST -RADIO Socket $1.00 Extension Cord ( 30 ft.) $2.50 NNo.e 1u3tr0o dFyRnOeS JTa cRk A90DeI O l No. 618 FROST- RADIO Standard Base Shock- No. 410 FROST -RADIO Absorber Socket Tuning Coil $3.00 $1.00 I 11 No. 131 FROST -RADIO Double Circuit Jack 80c -74 ( No. 501 FROST RADIO No. 133 FROST -RADIO arashr Idac-Boa (c omplete) $3.00 Open Circuit Jack 60e No. 619 FROASbTs -oRrbAeDr IGOa Sngta n$d2a.7rd5 Base Shock - IÌ a ) No. 134 FROST -RADIO artlt.,,a Closed Circuit Jack 70e No. 616 FROST-RADIO C-299 Shock- No. 400 FROST-RADIO Absorber Gang $2.75 Receiving Transformer $9.50 No. 135 FROST -RADIO Filament Control Jack 85c 0 0 0 0 0 0 0 0 No. 138 FROST -RADIO 136 FROST -RADIO No. 608 FROST -RADIO Push -Pull panel Multiphone Plug $2.50 Filament Control Jack 90e mounting battery switch 30e 111 HERBERT H. FROST, Inc., 154 WEST LAKE STREET, CHICAGO 30 CHURCH STREET, NEW YORK CPTY i/'/átag.^' - Tell 'Ell) You Sait' It in the Citizens Radio Call Book - 1 Citizens Radio Call B -1? The Receiver famous thru Performance TELMACO Type Receiver B -R :9F=!, tt) fully meets the requirements of the discriminating pur- chaser because of the following features: #110 110 EFFICIENCY OF OPERATION: Securing volume, distance (1 500 miles with single tube is not unusual), selectivity: broadcasting stations one -half mile distant are tuned out by a slight turn of condenser dial. EASE OF OPERATION enabling the novice to secure satisfactory results. HIGHEST QUALITY OF WORKMANSHIP AND MATERIALS. PRICE within the reach of everybody. Manufactured exclusively for us by Tri -City Radio Electric Supply Co., licensed under Armstrong U. S. Patent No. 3149, Oct. 6, 1914. 1 I 1 Specifications: Q2500 Panel- Formica, grained and machine en- JOBBERS graved. Vario- Coupler -Telmaco special silk wound wit-hS l oading inductanc-e. The We have an at- Condenser p e c is I 13 -pla-te ultimate tractive proposi- with Bakelite ends. Rheostat tion for a few Single knob control. Socket in value more bona -fide Highly nickeled shell, Bakelite Jobbers. -are base. Dials polished, pre- senting pleasing contrast with DEALERS dull panel. Telmaco Adjustable Vernier Handle-secures ex- if your Jobber tremely fine tuning and entirely cannot supply you eliminates body capacity effects. order direct. Workmanship- manufactured ac- cording to Telmaco's rigid speci- fications. This Guarantees Your SI a%tzi svfaocltt iotnu.b e Emiatyh erb e 6u sevd.o lt or Teplmlifaiceor BfoAr 2th -Se taAgbeo vAem - $20°° 20 Circuits in Blue in Catalog Our New Radio Guide Book Sent at Your Request Our new 64 -page Catalog No. TCR contains twenty of the most popular radio circuits printed in blue. These include the Hazeltine Neutrodyne, Grimes Inverted, Colpitts, Flewelling, Reinartz, Diode Electrad, Hetero- dyne, Super- Regenerative and many others. Each ar- ticle used in circuit is attractively pictured instead of appearing in straight schematic form. Besides con- taining blue prints, the best in radio is also illustrated and described. Catalog sent postpaid for ten cents. Each circuit worth double. Send for your copy today! TELEPHONE MAINTENANCE COMPANY Radio Division 20 So. Wells St., Dept. J, Chicago, Ill. Tell 'Em You Saw It in the Citizens Radio Call Book Citicens Radio Call Book 7 AND EVERY PART GUARANTEED When you purchase radio equipment, you do not act differently than when making other purchases. You are in the habit of demanding the most for your money. The reputation of the seller is yòur guide. You cannot Type 231A use a better rule in radio. AMPLIFYING TRANSFORMER PRICE $5.00 The next time you are making radio purchases con- sider the fact that for nearly a decade the General Radio Company has maintained a research laboratory for the study of radio problems. For years such discriminating laboratories as those of the General Electric, Westing- Type 156 house, Western Electric, Bureau of Standards, Naval VACUUM TUBE SOCKET PRICE $1.00 Radio, Signal Corps, Harvard and Yale Universities, Mass. Inst. of Tech., and a host of others have been using our instruments in ever increasing quantities. Historically, the General Radio Company has also been active. It was the first company to have available for general use the closed core audio frequency ampli- Type 300D fying transformer, it was the first to have low loss lab- AMPLIFIER UNIT oratory condensers for experimental use, it was instru- PRICE $8.25 mental in the standardization of the four prong tube socket. We h we a reputation in the electrical and radio in- dustry to maintain. We cannot afford to release inferior equipment. It will cost you no more to obtain quality Type 247 instruments that are guaranteed. We solicit your pat- VARIABLE AIR CONDENSERS PRICE $3.00 to $8.50 ronage. BULLETIN 916 -CB SENT FREE ON REQUEST GENERAL RADIO CO. MASSACHUSETTS AVENUE AND WINDSOR STREET CAMBRIDGE 39 MASSACHUSETTS Tell 'Em You Saw It in the Citiwens Radio Call Book 't Cilt:ens Radio Call Hook CLARITY of speech and music can only be accomplished thru TUBE SOCKETS the use of well designed SWITCH LEVERS R730 Standard Tube Socket RADIO PARTS. Absolutely de- GRe7n3u2in Ue VB-a1k9e9lit,e C B-2as9e9. fuSroncikaehte d pendable insulation i3 a requisite of RR777743 11%'.' iinn . LLeevveerr either In Black or Mahogany. first importance. R775 1 in. Lever Black or Mahogany Bakelite knob; Highly polished ftinb. Radio, a science of high frequencies and electrical stresses, requires perfect insulating materials to eliminate the leaks and losses solely responsible for noisy circuits. GENUINE BAKELITE parts insure an efficiency resulting in perfect, SILENT CIRCUITS. PLAIN RHEOSTATS RHEOSTAT DIALS R630 6.5 ohms R294 White Dial R.632 25 ohms R295 Black Dial R634 40 ohms Knobs of genuine Bakelite; Furnished either in Black Black or White Face Dials. or Mahogany Bakelite. INDUCTANCE VERNIER RHEOSTATS SWITCHES R631 6.5 ohms R750 White Dial R633 25 ohms a R751 Black Dial Genuine Bakelite; vernier control Made of Moulded Bakelite; Beauti- gives micrometer adjustment fully designed knobs and dials. of resistance. ALTI NING ALL THE UNAME IMPLIES RADIO APPARATUS Radio Apparatus Division KING SEWING MACHINE CO., Buffalo, N.Y. Tell 'Ent You Saw It in. the Citisens Radio Call Book
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