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Amateur Radio Licenses f'r. he New 1941 Super Skyrider Model V SX-28 delivers precision performance! 15 tubes. 2 stages ~re-selection. Calibrated bandspread inertia controlled. Micrometer scale tuning inertia controlled. Tone and AC on-off. Beat frequency oscillator. AF gain. RF gain. Crystal phasing. Adjustable noise limiter. Send-receive switch. AVC-BFO switch. Bass boost switch. Phono jack. 80/­ '40/20/10 meter amateur bands calibrated. Wide angle "S" meter. Band pass audio fil­ ter. Improved signal to image and noise ratio. Push-pull high fidelity audio output. 6 step wide range variable selectivity. Im­ proved headphone output. Super Skyrider, Model SX-28 with crystal and tubes,$179.50. Adjust phasing Retune ltecelver to :'~~~:~ ir:t~ ;11r eontrolca.refully sharp position iden• until this weak• :~:. ·:~-:."8'~n ~r:rJ!t tit_r the weaker am­ er amplitude i• pitch control until phtude -Tune If•• reduced to a you get not• most c~iver to the weaker. minimum. pleasing to copy. 1 'fhe Sky Champion represents one of the best values ever offered in the communications field-has all the essential controls for good amateur reception. 9 tubes, 4 bands, tunes from 545 kc. to 44 me. Band one 545 kc. to 1720 kc. Band two 1760 me. to 5.2 me. Band three 5.3 me. to 15.6 me. Band four 15.3 me. to 44 me. Automatic noise limiter. AVC switch. Standby switch. Inertia handspread tun­ ing. Separate electrical bandspread. Beat frequency oscillator. Battery-Vibrapack, DC operation sockef. Cabinet dimensions 18½" long, 8½" high, 9%" deep. The Sky Champion (Model S-20R) $5,.t.50. Tube line-up, 6SK7 RF amplifier,, 6K8 first detector-mixer H.F. Os­ scillator, 6SK7 first IF amplifier, 6SK7 second IF amplifier, 6SQ7 second detector, AVC first stage of audio, 6F6G second audio output stage, 6H6 automatic noise limiter, 6JSGT beat frequency oscillator, 80 rectifier. OCTOBER 1941 VOLUME XXV devoted entirely to NUMBER 10 D!ii STAFF'* AMATEUR RADIO Bditori<tl PUBLISHED, MONTHLY, AS ITS OFFICIAL ORGAN, BY THE AMERICAN RADIO RELAY LEAGUE, INC., AT WEST HARTFORD, CONN., U. 8. A.; KENNET a B. w ARNER, Wll'l!l <WFICIAL ORGAN OF' THE INTERNATIONAL AMATEUR RADIO UNION Editor and Bu,iness Manager CLA.RX C . .RODIMON, WlSZ Manag,'ng Editor GEORGE (}RAMMERt- wl'DF Technical Editor DONALD H. Mix. w.!Ts BYRON GOODMAN, WIJPE A,,iatant Technical Editor• CONTENTS EDWARD P. TILTON, WlHDQ Editorials 7 Contributing Ed1'/or, [1.JI.F. Midwest Division Convention 8 V;:RNON CHAMBERS, w!JEQ New England Division Convention . 8 Technical Information Seri/ice Around the World with the Yankee. Oakes A. Spalding, WlFTR 9 An 80-Watt AH-Hand Transmitter or Exciter · Jurns J. LAMB, WlAL B,rTon Goodman, Wl.TPE 15 _Re,earch Engineer, ,LFl,.ll.L. For the Junior Constructor A Lecher Wire System for U.II.F. Measurement 18 .. Adt•ertislng What the League ls Doing . 20 l<'. CHEYNEY BEPl'KLFll.', wlos The Decade Calibrator. R. B. .Te.D're0y, fl"BGDC 23 Advertfainq M anaqer An Inexpensive Automatic Line-Voltage Regulator S. Gordon Taylor, W2.TCR 26 Cir','ulation New Acting Chief Signal Officer . 29 D,w:m II. JfouoPITON U.S. A. Calling . 30 CtrC-Ulation; Matla(lei In QST 25 Years Ago this Month 31 WWV Schedules . 31 RALPH T. BEAUDI1'., WlB.A.W YLRL, QRV! . Anita Bien, IFBTA Y 32 ,isst. Cireulati'on .M a.naaer In the Services . 38 Navy Day Receiving Competition . 40 Predictions of Useful Distances for Amateur Radio Communica- * tion ............ 41 OFFICES Get Your Code Proficiency Award . .. .... 42 :-18 La Salle Road The Secrets of Good Sending. Part II E. L. Battey, IVJ UE ,i3 West Hartford, Connecticut ARRL Battery-Powered Equipment Test Subscription rate In United States and Possessions, ~.50 per yesr, post- F. E. Handy, WlBDI 4,6 1>aid; all other countries, $3.0\l per Oklahoma State Convention ..... 47 .Ye/11'. post.paid. S'lngJeeoples, :Z5cent.,. Foreign remittances ahou!<j he b;v tn­ Automatic Direction Finding ffolph Gibbons. W7KV 48 ternatlonal llOStal or express money A 56-Mc. Transmitter for Mobile Work order or bank dralt negotiable in the U.S. and tor an eqnivaJent a.mo1ipt Byron Goodman, Wl.TPE cmd lial Bubb, Wl.TTD 50 ln U. 8. lunds. Army-Amateur Radio System Activities . 53 Entered a., second•claS>l matter Ma;v On the illtra Highs E. P. Tilton, WIHDQ 54 w. l.9lll, at the po,;t otnce r<t H~ The ARRL-Red.Cross Preparednes~ Test- · ford, ConneetictU, under the .ACt o! March 3. l871l. Acceptance tor mall­ J . .A. 1\-foske_y, WJJMl" 57 Ing at special rate of posW,ge pro­ Hints and Kinks for the Experimenter vided for In ae<itlon 1103, Act i:,f October 3. 1917._autho_rlze<I Septj,ms F'eeder Tuning- S. A. or Modulator as Audio Oscillator for ber 9, 1922, Addltlonal entry ai Concord, N. R .. authorized. F'ebru-. J'. C. W. --- F'requency Equalizer for Crystal Mikes- 40- ary 21. 1929, u_nder the· Act .ol Meter Zepp on 160 - Interference .from A.C.-D.C. Receivers 58 F'ebruary 28. 1925. Addltlonltf se,jC ond-ct11Ss entries to cover sectional Correspondence . 61 edltloµs autl)ortzed Marcil 20, 1935, Operating News . 62 Copyright Hf4! by tile Alhermii.n: Trainee Traffic Stations 64 Radio Uela;v League, Inc.. TIile B.P. L. registered at United States P"ient 65 Office. Code Practice Stations . 66 0. R. S./O. P. S. Activities 72 Silent Keys . 86 Hamads .. 107 QST's Index of Advertisers uo Section Communications Managers of the A.R.R.L. Communications Department All appointments in the League's field organization are made by the proper S.C.M., elected by members in each Section listed. Mail your S.C.M. /on the 16th of each month) a postal covering your radio activities for the previous 30 days. Tell him your DX. plans for experimenting, results in 'phone and traffic. He is interested, whether you are an A.R.R.L. member or i;:et your QST at the newsstands; he wants a report from every active ham. If interested and qualified for O.R.S., O.P.S. or other appointments he can tell you about them, too. TLANTIC DIVISION Eastern Pennsylvania W3BES Jerry ?i.Iathia 6042 Ma.ster St. Philadelphia M aryland-Delaware-Distrlct 9701 Monroe St. of Columbia W.lCIZ Hermann E. Hobbs Silver Spring P. 0. Linden, Maryland Southern New Jersey W3CCO Lester H. Allen 704 Quinton Ave. Trenton Western New York WSPLA Fred Chichester Sonyea Western Pennsylvania W8CKO KA. Krall 703 Broadway E,ast McKeesport CENTRAL DIVISION Illinois W9ILH Mrs. Carrie Jone!!I 2407 Central Ave. Alton lndiana W9AB HarrY B. Miller 72Q E. Lowell Ave. Mishawaka Kr.-ntucky W9ARU Darrell A. Downard 116 N. Longworth Ave. Louisville Michigan W8DPE Harold C. Bird R.F.D, 2 Pontiac Ohio W8AQ K H. Gibbs 40.5 Broad St. Wadsworth 'Wisconsin W9UIT Aldrich C. Krones 2702 So. 46th St. Milwaukee DAKOTA DIVISIO"' North Dakota W9RPJ Don Beaudine 512 14th St., S, Fargo South Dakota E,C.Mohler Box 149 Rapid City Northern Minnesota ~iPm Armond D. Brattland Birchmont Rd. Bemidji Southern Minnesota W9YNQ Millard L. Bender 608 N. Huron Ave. Spring Valley DELTA DIVISIO"' .',,,rkansas WSGNV lohn R. Sanders P. 0. Box 1563 Little Rock Louistana WSDWW \\', J. Wilkinson, Jr. Room 313, Jefferson Hotel Shreveport Mississippi WSEGE S. Henton Cain 221 E. Monticello .Brookhavt>..n Tennessee W4DDJ M,G.Hooper 4908 Georgia Ave. Nashville HUDSON DIVISION Eastern New York \V2LU Robert E. Hai1<ht .511 Sou.th Holmes St. Scotia W2AZV E. L. Baunach 102 Central Ave. Massapequa. L.. I. ~Oith~n il-:n!el~;nd W2LMN Edward Gursky, Jr. 367 Van Winkle Ave. Hawthorne "IDWEST DIVISIOU Iowa Ray L. Martin 209 Leffi('.r St. ~f~fu~trlington Kansas ~05JH, A. B. Unruh 1617 S. Seneca St.. Missouri W9OUD Miss Letha Allendorf IOI;; West :lrd St, {fPli~ Nebraska W9WKP Garold Bennett 914 Wrst 7th St. astmgs '"'EW ENGLAND DIVISION Connecticut W!CTI Fre.derick Ells. Jr~ 1Q Merrill Rd. Norwalk Maine WlBAV Ames R. h-Iillett 37 Morning St. Po1-Uand F..astern Massachusetts WIALP Frank L. Baker, Jr. 91 Atlantic St. North Quincy We!'ltern Massachusetts WlJAH \Villiam J. :Barrett 239 Columbia St. Adams New Hampshire WlFTJ Mrs. Dorothy Vi.'. Evans 163 South Main St. Concord Rhode Island Clayton C. Gordon 70 Columbia Ave-.• Gaspec Plateau. \Varwick Vermont Wl~f{Wl G Clifton G. Parker Box 537 Morrisville NORTHWESTERN DIVISION Alaska KIGNN James G. Sherry Cl.uchagot Idaho W7CRL Clitfo_rd A. Jessup Post Office Dept. MoscoW Montana W7CPY Re" R.obcrts Box 1088 Glendive Oregon C.art An~tin 1137 Federal Bend Washington ~rn~J Carl F. Hofmann 4413 East E St. Tacoma 0 ACIFIC DIVISIO"' Hawaii K@:TF Francis T. Blatt 837 16th Ave. Honolulu Nevada W6BIC Edward W. Heim 509 Claremont St. Reno Santa Clara Valley W6!UZ Earl F. Sanderson 101 Claremont Ave. San Jose Eao:;t. Bay W6TI Horace R. Greer 414 Fairmount Ave. Oakland San Francisco W6C!S Kenneth E. Hughes 209 Lincoln \Vay San Francisco Sacramento Valley W6MDI Vmcent N. Fcldhausen I 13 South Quincy St. M,cCloud Philippines KAlGR George I~. Rickard Box 849 Manila San Joaquin Valley * W6PPO H. S. Walling Box 929 'Fresno ROANOKE DIVISION North Carolina W4CYB \V. J. Wortman P. 0. Box 566 Morganton South Carolina W4BQFo'ANGTed Feriiuson 1213 Co11e,ze St. Columbia Virgin.Iii \V.3G\V Frank 8. Anderson. Jr. 470.1 New Kent Ave. Richmond \Vest Virginia W8OXO W. D. Tabler 1004 So. Davis Ave. Elkins ~ocKY MOUNTAIN DIVISION Colorado W9EHC Cart C.
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