Newspapers / The Roxboro Courier (Roxboro, … / Aug. 23, 1922, edition 1 / Page 2
Part of The Roxboro Courier (Roxboro, N.C.) / About this page
This page has errors
The date, title, or page description is wrong
This page has harmful content
This page contains sensitive or offensive material
. ,f ' 'V PAQE ywo USE OF CHOKE COIL 1 " AND TRANSFORKEHS ; Latter Provide the Most Prac- ? tical Method of Coupling * ' for the Amateur. . t . * * _I Q FIgun? XXVIII shows* the actual v circuit of a three-stag* i. resistance * coupled n mj JI flee, The output of such 1 a circuit Is K times R times K the input v - oir assuming the limplitlcatlon" fiictor t of each tube to be 10, the output would A be 1.000 times the Inptif. The resist- v 4?nce K IM the 'coupling resistance '11 whose function it Is to transform the plate current variation to potential ( ' drops to "be applied to the grid.of the next tube. * F The capacity C Is s'mpiy a means r of allowing the* potential variations ? Vr across fhc'eoujfllng resistance K to h -* be-applied tar-the grid of the next tube. yet not nlidwing the *T?" battery Up- ? ' ' piled to the plate circuit of-si tube to t l>e appllbd to the grid of the next, c Because of . using the condenser to, r what one might say. Insulate the grid r froifi the "11" battery potentlftl, it is | c necessary to uSe a grid leak, to keep | t ? the charge which collects on, the gjrid J 1 frotp becoming rstH ^sfve nnd reducing ' i . >** ? jiijtii- I'unrm ID ifiu. Ofce of the chief ?15stt<lvant?ges of * the. resistance coupled ampllller is t v that very Uiph plate h-iuery potcn?> V Tf+MnlrrKar >< s. J_iE?E I Trnrrt-x/vr-mar ~t - . ' ' . ; jT^-nTrr-nt - i v V# 2. ^.V/ * ? ?w . . ' >' lYl ?il'l-'l'l? 7 7.. - jr/sy&tcc . Covf. | U tiuls arc nft^aaiir^ TlW arapllflcnamplifier is not "na high as It Is for i some other methods- hut !t i? amble , and dors nht distort the input as I uiu'eh as do some other methods used which -glve greater amplification per tube. Hesistiinre-couplpd amplifying may f he used to simplify either radio or nudlo frequency. A method of transforming ihe i' change in plate current of a vacuum tube to differences *'n potential is by means of a choke coil. A choke coll consists of a number of tarns of wire wound up in a, multilayer coll and may or may not have an Iron core. A coll of this kind offers a high Impedance to the flow of alternating current. hut bus a relatively low direct i current resistance. ' The choke coil mi account of hnv- ) lng a low oh rale resistance, .will have /* a smaller method of coupling, so that lower "IV* battery potential can he used on choice coll coupled ampltflers and the batteries can be of smaller capacity. 1 The choke coll not only has Inductance hut a pertain nmount of distributed Capacity. The distributed capacity of the coil plus the capacity of j the plate with respect to the filament. | together with the inductance of the ! coll, give to the ,plate circuit* n^'oer- i tain definite period. That Is, the plnte i circuit Is an oscillating circuit whose : . * resor freotHipcy is determined byY tht :<> ?j 'udty find indberrmre In : thr Ii t. ' lL_ v?."f 1 l>e mode variable. ; It V- iI not only rarve to trnM'Tn the j plut:.?jcurfen* sail tiuti .with Maximum j P '" iioieniwii arinrinni*, :?:-t ]j will i ftH' serve*to iimp. 0111 unwanted -frequwHw. When the plate cirdflt of the unipl'fh r N Juned, the resonant ffe'ipje* Ts amplified Vv_ times. |?ut ull ' other-tfraipionrtefi are amplified to n k less degree. * ~Aiipther end hy far the most ' , -widely used method of coupling hucCMt?e tubes In a cascade amplifier is I by menpg of transformers.. The trana-fnrtner method of coupling amplifier tubes may lie considered a development and a refinement of the simpler choke coil method. Coupling tubes by means of property desiimefl tfans1_ formers will glve^ a greater amplification per tube than any of the orTier , . ~?lugUiuila. ==?r?rifore XXXI shows the diagram of n tnree-fltngo transformer cbnpled. amplifier, where P and S ara reapeetively the primaries and secondaries 1 j the roupHng' t rnuafonner*. The ~T* traoaforrnern* a whole U so designed M to convert the ptfrta current vttrto=** jntn niavlmnm notpntlnl varjh-7 '. turn*. The plnte circuit of each tube which Includes the primary winding e! ^U^qnpttng trnngformor n. .ai?h?? .~:T > ~C?-- ?:: * - ^ ' " signed for maximum powei* nnqrii* cotlouy while at the <nwoe titic theatio of the transformer. miift. ht-suclv s to deliver inux ujoin yofoniiiil to he grid circuit or the ncxt'tubei The greatest advantages of the rnngforrqer method -of eoupilnjr trt.Hd rgffifcrcy amplifiers" are the high de* xee of amplification. the relative implfdty of operation, and the low Igje . v olt \g h reqoiretL Chief unrfMiiC tfTe: disadvantages of he transfbrmer fcoqpled frequent-y mplifier is noise. Alsf? the transom; ers amplify different frequencies o different 4 degrees, which means hat when this type of coupling is ised for radiophone reception. the dice-is distorted by the amplifying ransfnrmers. However, from o pruo icnl standpoint, the uveynge amateur gflt have better re sulfa using t ran sorraer coupled audio frequency aniplilers than from nnj other method that an be .used with Hie tubes and equipment now availably, 3BEAT BRITAIN VS. AMERICA .' * i 3adio Amateurs of Those Countries Pursuing Distinct Courses in * Development of ^Receivers. Two separate and distinct courses ire being followed by the radio amneurs of this country and Great Britiln in the development of receivingipparatus for. continuous-wave telegaphy and wireless . telephony. -Both ourses are of the. utmost importance o the art, atid each will exert a great nfiuence .on the future of^radia communication and entertainment. The American amateurs* bqve gone ilong the lines of regeneration and implincatton or flucnnre signals, as .veil as development Pf long-distance i -HIIe, 11 H jl 1 I ' ' ' .. ? . t/fer /7ssy>//)5'e*' zzm reception on short waves by the super?-T?V"" I r;'^ ;| On the other side ef the.Atlantic the Rrirlsh an;nienrs. restricted In . their liobby by ultra-conservative government regulations, have turned their attention ??>1 ely to radio-frequency amplification. This has given excellent results n ail long nnd medium wave lengthssbut Its suci. ss on shorter wave lengths has depended solely, upon rfte expert handling of the operator, who has hce?. compelled to use tuned loupllng^ircults between each ofv the radlo'frequency vacuum tubes. It t?vb early yet to tell which of the two systems will ultimately triumph. but there 1b no doubt that the laurels at the present moment rest upon the American amateurs through the latest achievement of their lender. Anrietrong. In the production of the super-regenerative system. ft I - - - V SHORT FLASHES The enormous popularity of radio has started out a new crop of solicitors, offering the stfrck of fake companies. with allowed glittering prospects. A general warning Is being broadcast for fans t to be" on the lookout for these smooth gentlemen. A young radio sharp at Ogdensburg; N. V., recently heard I through his set: "Come home \j Uh the ^ar,^-Howard; I have I to. go t<? the store." Who can > | say that u Met In the .pasture | j will not soon call ^ the eovVs at I milking time:. "Come bog!" In making a regenerative set j employing two variometers and ! a variocnupler be careful not to | 1 get the Instruments too close i together. If they are,' the set j will how). A Set of this type ! j should be mounted in a box ] not less than sixteen Inches j long. Dr. John J. Carry, often re| ferred to a* "the wizard of the i telephone," has had added to ids j |~" many complimentary college de- S gfees1 that of doctor of science. ?4 | Yale university. Doctor Carty, ' . I who rmiks us ?i . nngaoier gen- j [ eral In the aitmai corps reserve, I . V. 8. A.", whs given this last ' honor* for holng ? radio- oxperf. Sir Arthur Conan Doyle .pre M.+n .himmnni.-ntlnii n tf h ~tlndead by radio within four year*. Sir Arthur Is firm In the. belief that wHbln .that time "we will have the direct commnnlcation that Edison hoped for" and that those' who have passed beyond will 4,have transmitter* in the line of ^ther-and all tha* wo -j wllJi need will lie* the receiver." ] jg? . . V ICr 7 . ' ?- ?.. - ?: . * \ THE.ROXBORO GOURIEU 4 jrrr i rtT ~r i mi v ~?~r- ^ j iifumiiimiiumtuniumiitmiiiiiiimK: The > j Home-Coming j | By JUSTIN WENTWOOIJ : nlUIUlfilllllHIItllllllllllllllllilllHlilllli; Copyright. l?|t. W'eetera Newspaper fa.?! Amy was coming home. Adeh Mprch was standing at. tUa fnhnhous door%- waiting tor her. It- was twelvj years since the sisters had onet, am both were elderly women. > Amy had married Tom Leecraft, ar< he had taken her West. He had dont well. He had died. Amy was comln; home. ! B As Adela waited for her, her mlnj went far back Into the past. She wa n girl of twentytfour again. Amy wa two years younger. That had beei thirty years ago, when tlielr fathei the old -squire, was living. They hat ...been the principal family of the vil Iagfr?now a town?inhabited by a mis cell any of foreigners who worked It the ninis. Everything had change* and that night had changed the whol future of each of the sisters. They h&d both been in love wit Tom Leecraft, and. us was the wa In those dim times, which we no> call the Victorian Era, each of that would rather have died than have ad mitted the fact of loving before boin asked. Tom had a good practice ns lawyer In the vHinge; he was n sail able match for either. At first h had seemed to prefer Adela ; hut thei Amy came home, and everything wa different. .. Jusr as AyIpIm >flfnon,l . ?? 1 Tom know tlint el>?? oared, when h \vns hot on the ch::<e of hcr,:so no> she refused by anr Vc.net sign-to nh-o how much, she suffered. She wntvhe Tom and Amy sitting together a nlghls upon the porch. _t$hpL wo?il show no bitterness, hut- she withdrew Into herself. She tried her hardest hot to 1r Tom know that she felt the chiaige I hlm..but he knew. He acted diOlden*I toward her: They were emhurrasac In each other's presence. Amy, .to< who had at first confided her lov In Adela. now grew strangely rTiotv It was like a lowering thunderstorm t the house. Thunderstorms break. Only the old squire knew norhln of .lt. absorbed as he was in his fart and crops, and local politics. There came n certain night -a ho thunderous summer night wheo -th atmospheric conditions seemed refieci ed In their souls. The storm woul break soon. Jt was plt'dh dark, so thn Adela. from .the lighted dining ruou could hardly mnke out Tom's an Amy's forms as thoy sat on the pore together. Adela went out. Amy had left Tom side. Adela strolled In the gaVdei thinking bitterly that It was Impoi slble to bear It "'much longer. Ellin Tom rnust ask Amy to be ills wife < she must go^ away. The scent of"tfc roses* was heartbreaking. , Suddenly she saw Tom's dinv ftgm In the way. He drew her into hi . >T lr< vnwf 11 n i.llt I was whispering. "Darling, will yo marry me?"' She gathered all her strength an fled. She fled to Amy. She to!71 he "Torn asked me." she said. "II thought I was you. T run away. Yo miiist* go to him and tell him 'yes But first, swear to me that never, a long as you live, shall Tom know h asked me by mistake In the dark." Amy sobbed on her sister's shau 'der. She promised readily. Adel wear fo he<! T? rho tv* " ? ..f.UIII* XUI went into the squire's room find aake for Amy's hand. f And .so?they were married. They went away West, Two o three times since then tbey had ba* home. They had prospered. Tom ha died. It was a simple little story. The fly was crawling up the hil A debt waited. It drew up at the rtooi Amy stepped out?a n.!dU*-*if*< wrinkled woman. The sister* ciaspe each other in their arms. Over the cooking .Adeia iatd: "Yo must stay here for always. Amy. Tou money and mine wUl keep nicely. And you're all I'r# gal, want you for the rest of ray }10 We've seen so little of each other." Amy turned and faced her. a Hfh of resolution ori her face. "Ado!*, must tell you something.'" she sa'.d 1 a choked voice. "After I've told yot you can decide whether you wan me." "Yes?" asked A de-la calmly, Inontf her heart wus pulsing furlouaU. "ItIt's about Tom?" she qdde-1. Amy nodded. "I 'never knew, sr.d was not.-to blame. I lenmed It u the Inst, when he was delirious. R calico ror you nil rne time.- He neve know he had told me." Adehi stirred the pot. "Go on. j "Ho?he loved you. 'You know the night in the garden? It wait list i mistake. It <vos you all the t'.sna h wanted, not tue at all. "When I went to him next mom log and made lilm think he hail kia*e< ine and asked me. by mistake la :it darkness^ even then he kepi ceetri L of himgelf. I ilhi not gun that! was you. And he was very t+f4' t me all the years of our life It wns only at the hist I knew. * The hammering In her slat eft pGse I sounded lfke toe s>vkig of en* in I fuq-nal mechanism rhar tnrt nragti her up and carried her away. ?4fin ' what might it Hare higflf ?i> thing was clear, and?and 7t ?? peaceful In the decline of Ufa to ha?i that her love-had been answered I "Weil. It cant he helped," ao at r wtnrtl briskly. ^4.et'e jfo and hxv ! supper.1' _____ j The first t inaey fatrs In ftnflen ! were triple lit the reign-of Sdweri nr. . .?- . - ^ AUGUST -'3rd, 1922. _ - - "4 i- , PEGGY: DECEIVING t n ? jr , ' ? ' V?6G>'. MEN APE NEVER SO EA \ * J & r. ... # n t- ' v . d / it * 'a ' ? *f > THE WELFARE OF THES 10 __ . BECAUSE 0 THE PEOPLES BANK, d Oldest and Strongest P Assets over One Milhon Dollars e | BANK OF RO.XBORO. I Safety deposit boxes fot rent.. Your Account Solicied t. _ s * COMMERCIAL PRINTING CO. 4 Pat H. Clay, Manager ? -)= "The Shop That Service Built'' i FIRST NATIONAL BANK. ' i I. Capital 170,000.00 !. Surplus and Profits ?30,000.00 a ROXBORO GROCERY CO. r Roxboro. N. C. j Wholesale Grocers-^ser.d ~us " , your order r CROWELL AUTO COMPANY 1 ' Roxboro, N. C. * *TT n 11 n --i i.: nome oi me rorrc 4 ! h SERGEANT At CLAYTON " The Sanitary Grocery Store j Phone us your wants?prompt' t delivery. r DAVIS DRUG COMPANY Roxboro. N. C. Make our store your headquart| ters V- BRADSHER & GATES Roxboro, N. C. '* Bring your automobile troubles ? to us "t _ MDE .GOODMAN TOiiie Front, Court Street Our prices win?try us 1- _ t - - I Bi J j " B jrf F * Better * . "?? ^Subscribe tod * - ~ 1, - - ^ ^ DECEIVER WITH A BUMP (5 N m 31LY DECEIVED AS WHEN THEY APE E] ETTEi mreye o E MERCHANTS SHOULD BE YOU RISE AND FALL WITI JACKS OX MOTOR COMPANY Studebakers Reos, Maxwell A Overland Gas and Oils. W. L. MOORE Fresh .Meats and Groceries Your trade is solicited?satisfaction guaranteed R. A. SPENCER & SOI^T Undertakers. Superior Service?heat prices S. P. SATT1J6 FIELD ..." - s* : Insurance "OW &. Tried." You know. ! HARRIS & BURJj&_ Roxboro's Best Store Everything for the comfort of the family -? To buy right, buy at the right place WILBURN & SATTERF1ELD Roxboro, N. CGARRETT & WILKERSON Roxboro, N. C. ' General Store?anything and PVArvt h intr - ? ? ? J B ROXB0RO COTTON MILLS v Roxboro, N. C. Fine Yarns THE PRINCESS THEATRE, Ruxboro, N. C. Amusement for the entire family HAMBRICK & AUSTIN Druggest Block's Candies. Fine stationery and Toilet Goods ind better eac ay 1^1.50 yeai .. r? u ? ^ ? IO CRIME. NDCAVBRING TO KdiVE OTHKU ?n Peggy YOUR FIRST THOUGHT i THEM. / X- .. _ HARRY RAIFF'S OPPOSITE COURT HOUSE. T- Purchase The Right Goods at the UIGRTTRlCE. Cotae to ROXBORO LUMBER CO. . Roxboro. N. C. Buy from us and bank the dif -deference i \vATKINS & BULLOCK. Roxboro, N. C. Everything to build with. . A. LIPSHITZ Uoxboro, N. CThe Store of Quality SPOON & LEWIS , ' Consulting Engineers ^ Koxboro & Greensboro, N. C. fl NELLO L. PEER, Road Contractor, Roxboro, N. C. JOHN F. REAMS. General Contractor, Roxhoro, N. C. Figure with me before you build THE COURIER 81.50 a Year All klr.ds of Printing ROXBORO LIGHT 8- POWER CO. Roxboro, N. C. , * "Do it the electrical way."BLANKS & MORRIS. Roxboro, N. C. For-best Groceries, Phone 25. G. W. KANE, Roxborn. N. CContractor ? ' 1 ' I 'v ' 'm. . ~? .? r "> 'ifr'BM h wefck" . ^ i ; and worth it rr- ?
The Roxboro Courier (Roxboro, N.C.)
Standardized title groups preceding, succeeding, and alternate titles together.
Aug. 23, 1922, edition 1
2
Click "Submit" to request a review of this page. NCDHC staff will check .
0 / 75