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TODAY Silent: night for: CIKAC, KOA, I.) GW, WDA, WMI, Wi, WOR, Ww Ww Farben, ministen 2:4 p,m, concerts, 4, organ recital, Dn Charles Hein: or 45, vesnen services, Shady- side Eresbyterian chureh, Rev, Hugh. Thomaon Kerr, minister; sre dinner concert, Gragenio, Scalzo's; or chestmas,. 7:45, senvicea, Calvary. Bpiscopal) chuned, Rey. B. I. Van, Ztten, minister, KEL, Los Angeibs,, Cali, actfio, 46%), 1104 a, m, L.A church) feds eration senvice; 4:5. p.m), Vesper ser- Vice; $47. musical appresiation, adi. dress, Paul) Reese; 7:3, Metrepelitan: theater: pnogram;, 8-2, Hotel) sador concert onehestna; 910)” aminer studio, programs. 101d, Theron, Bennett's. dance: orehestna, KGQ, Cakiand, Callf: (Pacific, 212) Isa. mm, chuneh, service; 2:20 p. m,,, KGOQ Little, Symphany onehestra. |, Cari Rhodehamel; conductor, “'Valae ~—-Lentement, ‘Overture— Mimn tana, “Misnen,” orchestra; Jerusalem,” travelogue, Samuel; ballet suite, ° “Scarf Dance, “Da Ctreaasi« “Ave, Mania,” 'Mareh Le Regiment, anchestra; 7:20, chureh, service. ESD, St. Louis,,Mo., (Central, 546) mm, musical, apevinitios,, Grand, nial) theaters KY Chicago, Th. (Central; 526), 7p wm. Imperial Male quartet; “Pls gre Progress; Clifford: We Barges; 7:40."'Sonato in +. Minar, “AllpgNe. Moderato, pha)” “Ade. lagpe, com, Fuceg, heun! ‘‘Mrneh. Meneique;' Martin, onganists “All Men, All Things,” choin of 100; Doxoldgy, and the. Lord's: Prayen: "Bloss Qur Land;"" ehoin;, Seniptar ‘ayer ‘Land, of: Bope and Glo Louis, Isreidler: and) choin;, announcements, CUfford: W: Bannes; “he Lord is My Shep, herd,” M Mabel) Sharm, Merdien, soloist; hymn; address Dr. Lynn Harold: Houghs hymn organ poste Mn i Milita: . AAy Dallas: Tex, (Central, 476) E Tramily, Ford Fant, Wontiy, Dex, (Central; 476}, 10) a m., senvwites, Winst. Mather dist chuneh, Rev.) We Borginy pat ton;, Will) Posten, onganiats 4) p.m Teiaite) «theater; 12 midnight frolics, dance orahestra, WX, Detroit, Mich, (Baatern,. 527))|| 1720) a. Ms, senviorss Can ohureh,, Dr. Lynn, Banelh Hudson, quartets; aital;, Prof: Guy: C. Kilking,, breads ir | "Go, tay] Sea," Fred: Kickbush; “Round! about | singers, |) By i Inductance coils ane, used in. radio, circuits: to, tune the detector to, the: incoming; freanenay, and to maintain sufficient. voltage to operate To, tune to the various wave lengths @ variable, condenser } anos the, coil! to change its, elnctrical constant, while ta: the detector, im conneated: Tatain, the. voltage, certain, types of ersy: in, the colle. ‘The, first. three, coils, from to right; are familian types, wound om, eandbound: or bakelite: eylinders. Tho: others: ana not less: familiar. Nut ane more difficult: to wind, andtane, usuaily-bought ready wound, In. the, finst: sketch: is, shown, the coupler designed: fon the One Knob nets It is wound) on, a three-inci tube, and! consists, of a. primaryand, secondary, wollnd) with twanty-twa- gauge double cattomoovered: coprer wine, Thit: sine, wire: is employed: thronghouf for the other coils, as ft Ip generaily found) ta: be most suit abin for small inductances, The number of turns required is: deter- mined! by the, wave, length desined)) to ba received: For the bnaadoast: bani; oventy turns on the primary, and) fifty tums on. the secondary, on; & thret-inch, tube ane abont: night, Bank-winding: is used) whenever: broadnasi, wavelength, band; In. die! necond sketch, this: tyne off coil) ip, shown, woene the, third) turn, is dou: Died baci andi led) between and over the iirst: and) second; Concen- trated: indnetances. haying, & low east from Central M;. 3. chunehy WDAT;, Kansas, City. Mos, j@ guanices. of the Kannag Confer Hae oft Siindayy schdoip: of the, GN, Chicago, Ili, (Centrali, 279), 1k & mi, Uncie: Walt nade the fun: _ nis: to, the, childrens. 1546, concent: musital) college, concerts, % concents WGN: singers, Drake. ensemble. WHE; Kansas: Citys, Moy, (Central, 4), 9346r10) a, ms, Senvioces: Linwoed! wiewand Christian ohureh, Dr Burns: Jenking,, pastor; 88h me mi. servives,, Westport: Methosist: Bie copalichurely, Dry, We A. Tetley; naes|) WLS, WMAQ, WO, WRC; WEAR KDICA, H, Pittsburgh, Pam, (Saat time; 12 my. weethery markets, 12th Ds my Rte ny H orchesinal) 6:30) dinner congents, Y Kx Little: Symphony, orchestams, Vio-, tor: Saudeks, conductors. 7:16, Bhee Tar Alo, Khyunetens: ), “Boiticas, every-. bedy's Hrainess; sents Coven, Tee atvoks,, manketss, §, Hadio, Gi i meeting, Lauber. Holland i 21h. ‘Developing: & Pigasing: Faron, ality:'"' 8:30), “HODICA'S: Fourth, Binth day, Panty: %56. times, weather;; 10) anniversary: presram, KEY, Los Angeles, Cal,, (roitte &9) 7. m.,, Byening: Heraid) con: Examiner studio, resitedy 710:11,, Ambassador hotel) Cocomnut ) Grave orehestr KGQ) Qakland, (Pacifto,, 212) 40), Ss b, Studion muy nrosram,, ParantTeachem asso } 45580), Henry, Betty, | his) dance orchestras ipstrerpeovlign in. resi og is Gabon ts + courses: in agriculture, aoa, nomics; American, citlzenshin; views; music at," Serenade, tuo, Danube Wailtm My Love's: Waitingy Oli am ms, Gonry Halsteadts, * jections. pieila,’* BSD, St. Louis, Mo. (Conttal) 566) isi ms Abersh's concert: enrembie: Arie Jnnesen,, Wollnints Fort. Worth, Texaet (Cony ib, 476), 7280-8380, mi. ‘Moments stars, from, the concerts, Mont+ ore Kansas: City, Mo, (Cony $90) Dy any, the, Stan's: stringy, soho) of the airy piano, tun: per lady; -muvic, Hotel Muphiedach ignon, ensembie; S010), popular Osram, the: Stars!’ Radio orchestra: & ™m nighthawk: froite, the erry, Old) Chief and the, Planta 1540 Biaockstone titel) from, Lyon, and, Healy, concert: Drake string and re DB me ensemble anintet:. 2:20 hails, 3, rocking, chain time; 5:30) (Gen;| 20) os ™.. Monning; eer- | Shannon; %45) stocks), men Teng) + Chicaga, TH, (Central 270))| 5 itt. The pancaite, huneycomh, wad Ip necereery, to, reach above, tite): VOVOD 290000 weund sean ga ermanamt, Me, henenctnalame eokk brthe _ ef ian indiieg wantaswtal an idesl Renee coila— Socacineorte Six Types of Coil’ Windings Which May Be Used to Make Radio Frequency Couplers or Transtormers—T he Solenoids Are More Easily Made Than the Others. Inductance Coils Can Be Made in Many Forms . BEST TYPES HAVE LOW LOSSES} rie aoneyzomi collins ape | tvengue tor: tiie: purgome: af/qntadlints PROM DISTRIBUTED CAPACITY IDE. CHANGES? WAVE-LENGTH | OF HIS SET ‘The special’ amateur radin sta | tion, MQ, installed in: Wiscasset, by the Amerivtan, Radio, Reiny Cutside Loop Is a WILL. SEPARATE LOCAL STATIONS WHICH CAUSE INTERFERENCE. With the advent of scores of new broadcasting stations operating threnghont: the country at ono will) came a need for more selective receiving equipment; and) better antenna design, The greater, part af| |(tning: difttoultiam: comes, from: the primary, ar aerini) airauit, and) if \ it ig made more efficient, the rest: of the tuning becomes, easy, The beat: way of tackling: the: preiiem is by using a loop, For reception: an) muitituhe, sete the, Inside, loop warks well, but the one-tube set must retain, the aut jel oak reo pon a ot wate ling communication — with eNineetficloncy far radio cirouits, |>otoanen, “Bowdoin, which and hed found) its most popular use |brought Captain Donald B, Mac: in. the, three: honeycomb agil, cit) Milian home, from, the Aretio, had cult, primary, secondary and: ck) op heen im operation more than lor, Another type, te apiderwel twenty-four houra: before, myntarl: alpo, vantage af Ite: (Sang A any distributed) capac: | ous changes: became, naticeabia. in the wayelongt: af) the transmitter, ity: This coil) produces a ‘concentrated elactramagnatio field.) wnen. the sending set was tuned to, a wayelongtipy off 165 meters, and) may be, used! in: the same cir there, would be & variation of eight) cuits; as the henapanraty coils, an the Inet: three types: the honaycam )|meaters inv® few hours; when it was at the, most: ed to. te short, wave. of 30/ Mae wire for auffici¢nt vaiume.. >| coil) seema: to, have, foun fava: ete a by orate! whe maters, tiene woulil: be, a variation | obtain the sejectivity of the loop) fy about: three metara: in, approxt:+| and the: algnal delivery strength. of the) MAHER, \ windings: are, used) which prevent spider-web coils. are, designed: ta, ab> taim a concentrated) siectramag: netia: feild) and) to, eliminate, losses: due, to disinibuted: capacity which acours in the simple solenoid) types, In, the pancaite, coil. the. wire ip wound in a spirall shape, using & Srooved) pinte off insulating: mer ‘The, loop in one contmuons: nieow of wire, and may be any length between, one and two hundred! feat or even, more lt it im about one hundred feet, {t may be tuned with ® primary coil of twenty turns, bur Help in Tuni PAGE ELEVEN. Ma pricerwe>d ecilia prectical enc easy to males Great. ng Set Used) fewer m urns needed primary: ‘Tuning: lin ympitaliwd with: & pint varia rondenser, ronnectad: buliween ane aide of tite oop and) the: coil. This, type aff loop sinetions siightlyy ae an, antenna also, wiicn ih an advantage, because if it worked! solniy ax a lvop tt wont have, an) unidiractional effect operates: with gre Hecause the resittar aillating: cinenit: is decnsased tuning is caused by the | sistance of the andinary aerial. three z wars are, highly, eet eapniny tly the same spane. af; time:| ihe aerial) a combination af the he recom: mended; aepeciaily, where economy " This, phenomenon continued despite | of space im am important: ail, efforts, to, keep, the. onaillntor, {7% cam Ye made im an autnide con: sideration: fehacoly, tient, and amateurs, win} loop, whom: the station was in. communi:| ‘po, agsomplish: this cation persistently asked) why the sounding: Waye was being changed, | 287% 8m outside loop mounted om | He decided to, take. hin readings) te roof between short pojem at+ with the waremetanr at the ebb and) tached to the chimneys. The leads are kept away fram the sitiem of flow, oft the: tide and) compare them, He discovered’ that im every case the: house by poles: with: inaulators: ‘The design, off the loon | (ae, wavelength: increased: with, the jrise. of the tide and’ decreased) witn) attached: ithe, Fail, bv in| order to keep |may, depart from the conventional) the transmitter at nm constant wave. without affecting the efficiency, he makes! reguinn adjustmente, 2) ovided the, wire: in wall! instiated Deat:| Cormespond) as ‘Ar as, possible, with the de ‘* movements. aud) kept clear of ohatmations, Receiver Popular for Selectivity terial to, hold) the turns: in, Dinae Callodion: may: be: used) as a binder if the: pinte in. noe grooved, BROADCASTING HAS CREATED MANY NEW JOBS The. phenomenal! advances: madeftfarraaching innovations in the recently: by; the. Tadio art: ane: re | radio art, says: Dr. Goidnmith. Dis. suiting: in, the creation: of: new: pre ieee one more on Lome differentinted)| {ts aoe the. pasate aera By fk te ) engineering, aoaard: » Prats || Alfred: N. Goldsmith, of. C..C,. Ny. | every ‘he, specialization, anising: aut, ay the, complex. technical) prablame radio, has alnaady estabiisied) radia.) engineering: as @ new and portant. profession, Dr. Goidemith)! points, out, and) farther davelom | creases, the amount af radiation. of son increases the amonnt of radiation resonance, however, {m undesirabie, the amount: af! radiated! energy uni frequencies: used, shouiti: he, siight lpse fram, Gistmibuted) capacity, mayy ne. y off between, turnsvand: the: cylinder are neers extent, in the) geen afintn! y bakelite ar hand) rubbers) Basis indi coils and! variometens: ane, this: reason; mors. efficient than, those: wound! om, tubes, ‘There, have, heen, enough tuber: Blown, ont in. experimental) work, than, can, he used: in all, the, super- heterndynes: in, this country, A alight’ carelessness here; another there, and) pooff| Three mone’ per im; @ constant: danger: arrangements, If it in: ahange ® wire, om to: fi (ere Bibattery:, Merely, shutting: off: the: 4& battery does not heip, The tubes. gan, he blown: out just as, easily, with the: A battery: of ‘The B batters, in what: must be watohed: It: is: simpie, matter to, arrange, & aingle pole, single, throw, Bhaeaix: time); 6. Lyam andi Healy, ae pan, recital; 6:30, ko. convert: ony yembio, and Blackstone. strong: anuiny a tet: a the cinssi@: hour; vooal) andy in: mrumental: musis;, 10; Jack, Chapr HOW YOU CAN AVOID QUT YOUR TUBES | switeh-—~after it: if tom late, ff. as with it on. | p ae: primary, giving: a correct(he same tube, separating, the twowphones: with, », Mxed-condenrer:, ae) : forthe ‘varionn! wave lorgths| coils not lesw than one-quarter: of/|ahown;, aff .002 mitrofaradn: capac: ‘dnained; and: ease of construction, | an inci, ity: "The grideenit has: a, resistance | ite heing: so simple that: even the|) The other features aff the cireuit:| of tyra) megohms,, and! the: grid-con: naving, can, make, it, are, standard: The aerial! coupler in| denser has & capacity of .00025) ‘The: primary, coil! hae: forty: turns made aft same size, wire on primary, microfarads, that: are! af? number twenty gauge doubiecot-! and secondary, but: with only twenr! The coils should be: mounted: weil) entvalong these lines, appears nob “The exnenimentalt ‘being: done. tn American, Inbara: |) tories: by Inading engineers, prem ines sweeping: impnevemente, and Isnife, switch somewhere, om the table sa, that the cireuit. aan he opened! while: making; changes, i Some experienced radio fanm | clnim: they, can: watch all) their con: nections and) thereby prevent: trouble, Sometimes, they, can, bub they inevitably do, lose: @ set af tues, and) them they, install: the ‘trloian, knows: hy; the: saund) afy L unnatural! noise just what is needed) wide range) by this: method\. If a horn ip: not to disto: be nomvibrating: and) ite: alt column: resonances, wit! ) jaf aumpent: in) the: wind: vm me | FLOW a Loud Speaker | | Helps Radiation | 4& horm resonates at certain frequencies, and for that ne reason ha ‘orm of Ago . a those frequencies; and) for mof those frequencies, Any because it is impossibie to: inc formiy at all) frequencies, within wali) shoul oe Danse 2 & hor eannot amp it cannot suppiy eners: londis & harm merely pliragm, in sue: vay ag t more sound energy to Je {nto the surrounding: sx the diaphragm, A. simpie analogy: tt found! im the electric. motor. When, the motor has no lord) connected) te it; alll the energy supplied: if used up ax losses in the machine: [fa load: ls coupled to the: motor it draws: mone, power fram) the: line. in. order to supply energy to.the load), Wien, the load { Might: thd: afficionoy: is. low; av the load! if Increased the. officiency || 1 inereased; So it im with the diaphragm; jwithout: a horn the affiniency is | low, and! with a horm the efftoiency ia increased, The horm may be | Chonght: of an: analogoun to. a. lever Lwhich gives: the diaphragm a better arly on) the; aurraunding: airy An¢ 80) the, term; “radiator” mone ac curately describes: the action af # horm & goot horn, therefore, which, causes: the dinpi diate, almost: ynifermiy |auencios, within, thy, desired This: condition, is, mare ennily \teined: {n: a vinonogranit. than louds apenker. In theephonograpiy the daphrage im forced) to follow: the: vibrations o the record except. for thie silghtow spring: off the, needle; while: in: thy loud: speaker the diaphragm is no impelled) ta, foilaw they variationt Deorune there is no nigidd conneotion be tween) the twa, In the nlonograph | it: {t neoesanny’ only that: the hore }ahall radiate, unifarmiy at differen freqnencina: for a given. root mon my in: @ to, overnome it The only squeal) prions, sannok tim elinainagegs equinned: with, neutralining opm: | tom (wine, wound'on: a threa) ty tums, on: the, primers: In, both/apart, not) luam than, alx: inches, to send, ait: Into, neigit fer ‘After: m great: deal! of ‘and: renagesy cardboard on) ofroultay the variatle condanaer Hae, nravent. any induelioa: effects. be whon, the: detector: tube, fe: hurnt - radlo: | akeltte. tune, Tt hae three tans of), cannoity: af: .0008) mioraiarads,, ar tween, the primary of the, coupler | so brightly, that: the: set ascillates:| ; developed: that: lengthy range: from: twa, hundred to! Oventy-thiree plates, and! the other: coils and produces: a whistle, ‘The: nuite| has anes: i five. hundred and Mfty meters; the| Im seleoting a variometer for the | ‘Thin: aireuit’ may be connected | ance) of squealing, receivers; 1b -al+/them: anai maxinum: transfer of| maximum: broadeast tand, | pinte cirowits, It 1s, necessary to, get to the, alnndnrd) Uwoatage audio | most: eliminated; a listeners: are! eneray to the detector alranit, nan) After complnting the: primary) ono that “Has enough induative | crequency amplifier {orloud speaiter y | learning: Low: to, tine: ao: tint: they | resonant’ ~aliminating. un;| coil; wind the secondary: of sixty! vaiue to reach: the higher waves |operation, Its. range. is consider will not: he unfaln to, their nejgh-’ desirable hack: actions: frem)| turns using: number Cwenty-two) atiove five hundred meters, It is| ably greater than that of the ar) the secondary ta. ine primary; gauge-doubir agtton:covered wire-on) also necessary to. shunt: the tele | dinary: three-tube set: & A ONIN) Hou. SAO) TT WAS Cons square, valocity of the diaphragm Im the, loud) apeaiter his condition, and!» cause the diapiins ta nearly uniform y urrent: at diff {p. paased) through. hie hors |muat tmiffil , help brate, when ¢ quencies ‘windings: man's dance. orehestry and) latest WMAQ, Chicage, 1) (Cantral, keies 10558, time; cather |) stocks; 1:40) weather 245-1 presi number on the DuoArt: founth, af « ine popular songs. ’ 0, 40mm. Silent. night, for KIMAB, WCAR) markets; 12 Senlno's, orchestra; | dential elpetion, returns ndio pinno loswons, Mud: | WH) Kansas: City, Mo,,. (Central Frances: M WGK, WME, WNT, WoO, WOK: Od nes: tea Ahead IR: eedtay orenny]|. (Beare 4 5 Ore, fold; the, ‘Dell Me-ast ve 2M, Indios, Hour pragma, | shy ae She TH Spolk CKAC;, Montreail nada. (Bante | aang eePy lip : x bobabiadl 15 hi Ts vic, Motel) Mushiebach | pom r Radio. trios +} @arHole, Tonkins; 6, Chica 425); 4in, Ti, weather and atook. mary) (ett: 7155. Radio. Godmother: 7:80) aloo-| 4, ohidren avembie 4601 || tac r ne pregrams, of outoftttown, site| orgmn, recital; 0:20), Hotel) Dasalle. ar- |/iet reportes Mlddiss, stories, ini} fom retunnm, mac ines: 73165 the: “Mor tal 3 tions; address: member: of" the-facnity: | chestra, Frenohiandgngiieh; 7:30) Rox: Battle) MIN, os Angeles, Califs (noific.) weather, neice reports; & elvetion) and: the Mantutton payers | twils ing of; the. Sweeney, School; music: Swee- |) WiWal Detnalt, Mich. (Banterns.517))! and: hiss Mount: Royal: Hotel) concert 1), GHGS mm Aeolian: angen, recit: | returns: Ws orth: Wonth,, Texan: (Con: | Skoez 1 nes: Rudio; trigy. musicy, Dean Hones: Cownery. dines: |lopehestray 880), Canadian: Induetriat %&%, Hotel) Ambassadon Covoanut| \WwyAtt; Kansas, City, Mo, feociizes Dy T0880) Dp» mm, musicale, | san rai 1 WHO) Det Moines Lows, (Central) 8 a. mi, setting: au oxercigess It dé |iGoalr entertainerss, 10:80) Joseph Cr]\Grove: Orehontna;: 20) Texaminem) tral, 411), 880400 D,, m, the Stan'e) Baptict Thoojpxioal! seminary, Brac: |/vembie ' . S26) 773010 p. mi, Sally, Myers, pian: | Morto: 20, talks wore editosy |ismith and: his Mount: Royal) Hote})| Studio convert; 10:11, popular ballard) string trig: 20, weekly child tals) Chee Aireetor; %) 046, program, | et: 9). the 1) and Sst; talent, Drake Conservatory, off] Detroit: News; 12 m., musi Dy ™ | dance. orchestra, hour. }ent program, nunile off the Gertrude) If; Clyde Whitlock, viailnist, lutrumental) musi have tory; 131618), Ll. Carlos: Meier, organ:|Detpoit: News, artiiestrn: KDA, % Pittsburgh Ira... (Savt- KGO, Gakland; Califi. (acifie,, 312)| Concannon, Sethe}, off Music; a WHAA, Dallas, Texas, ‘coment nen's dance, ondiiesira and latest tote. f twoit, News, archostrns erm, 926)>~0146) a. m,,, atooke; mit 1:90 Dy mm, Ni. Wy, stooke; 1:40, I. sehoo), off the air: piane tuningdim | 476), 12:80 py) my music, Rod) head] popular songs.