'Y ;~* ·a~ I . ... t. I -"·· ..•.~ . • •·. ·· .......•.· ...... · ·e . t ·••. -· / "· UNITED TRANSFORMER CO. 150 VARICK STREET • NEW YORK 13, EXPORT DIVISION: 13 EAST 40th STREtt, NEW YORK 16, N. Y., CAB!,[$: "A 7!JNTEJr1c...... ... - FOR RADIO MEN IN THE SERVICE! As you know, the Hallicrafters make SCR-299 Communications tru~ks. We are proud of our handiwork and proud of the job you men have been doing with them on every battle front. RULES FOR THE CONTEST We want letters telling of actual experiences wi:h SCR-299 units. We will give $100.00 for the best such letter received during each of the five months of November, December, January, February and March! We will send $1.00 for every serious letter received so even if you should not win a big prize your time will not be in vain. Your 'fetter will be our property, of course, and we have the right to reproduce it in a Hallicrafters advertisement. Good luck and write as many letters as you wish. V-Mail letters will do. r;:;lli~~r~; ;f\5lT fN l5{A NA AV EN l)t, C q; U,.Si.A. ltx~f,t; •.J}ii~1 ;.:,_~~811;··•ibtlit;'b b 1 -SCR-_Jt-9 VANGUARD THE SCR-299 Mobile Radio Communications unit played a great part in the invasion of Africa and Sicily ... these units were used as mobile radio stations, transmitting voice commands to fast moving armored units while in action, or as permanent radio stations ... even under the most difficult operating conditions. THE WORLD'S LARGEST A leading military authority said, "My obser­ EXCLUSIVE MANUFACTURER OF vations in the theatres of war make it possible to SHORT WAVE RADIO COMMUNICATIONS EQUIPMENT say that the SCR-299 hit the jack pot in the mobile radio field as has the jeep in transportation." BUY (~~~·••.·. MORE~· BONDS! -~-- .. ~ 1-ha l.allicrafters CHICAGO, U.S.A. 2 th!voted entlrelr, to NUMBER 10 D!ii STAF1''* Editorial AMATEUR RADIO KENNE'Fll'. B. WARNlilR, Wll!!R l"UBLISHED, MONTHLY, AS ITS OFFICIAL ORGAN; BY THE AMERICAN General Manaqer of A.R.R.L. RADIO RELAY LEAGUE. INC., AT WEST HARTFORD, CONN., U. S. A.• Publications O:!'FICTAL ORGAN OF THE INTERNATIONAL AMATEUR RADIO UNION C!,INTON B. DESoTO, WlClll> Edit<>r 01tono1n OIU.1.0&.EB, wll>.v• Technical Edit.or DONALi) H. Mix, wlTS Acting Technical Editor HoLr,IS M. F'Rl':NCH, wlJLK CONTENTS BYRON GOODMAN, WlJPE* .1hsi•tant Technical Editor, l!iDWARI> P. TILTON, WlJiDQ It Seems to Us Cotuributinq Editor, V.H.P. 7 Splatter 8 wALTER E. BRADLEY, wlJr~•a VERNON CHAMBlllRS, w lJEQ. Supersonics for Communication S. Jonathan 1Veitzer,e.-t;-W2FSP 9 1',chnicallnformalion Sen,ice WERS for Seven Million People Frederick A. Long, ex-W8BSL, LOUISA B. DRESSER and Vincent T. Kenney, W2BGO 14 Editorial Aa.;atant U.S.A. Calling! . , . 19 JAMES J'. LA/d.lJ, WlAL.• Meet Mister j! Edward M. Noll, ex-W8FQ.l 21 Reaearch Engineer, A.R.R.L. In the Services , . 26 ,ldvertWng The Japanese l\forse Radiotelegraph Code . Charles E. Holden 30 1". CHEYNEY BmEKLEY, wJGs On the Very Highs . KP. Tilton, U:'JllfJ(> 3-1 Advertising M anauer "Handy Andy" . , . Paul./. Palmer, ll'llUGR 35 Circulation Happenings of the Month . 39 DAvm H. Houmi:TON Transmission-Line Matching Simplified <Jirculation Manauer. Thomas Armstrong Garretson, W2ASB 42 RALPH T. BEAUDIN, WlBAW ,hat. Circulation Manauer VWOA Awards Marconi Memorial Scholarships . ,t9 The Wail of the Kee Bird . •Major J. IF. Hunt, u;rsTG-W.SCCU 50 •on kav~ of aba,nu Experimenter•s Section . 52 New Standard-Jfrequency Service of the Bureau of Standards . 53 OF.FICES* The Traffic Cop of the Air Clinton B. Dt>Sntn, WU-:BD ;,4 38 La Salle Road Gold Stars . 57 W eat llatttord 7, Connecticut Strays ..... , . 58 Subaorlptlon rate In United Statea and Possessions, $2.50peryea):', l)Mt­ Hints and Kinks pald; nil other countrlea, $.1,00 per Cooling the Peterson "Pot" -- Some JletroJil Snags nnd Their year, Jl08t1>a!d. Slnglee,0p!es, 2Scents. Foreign remittances Should be by In• Solution - Combination 11-:lodulation ttnd Field-Strength ternatlonal 1>oatal or express mon(l)' Indicator and External S Meter - Headphone Connections in order or bank draft negotiable In the 0, S. and tor an equivalent amount B.C. Receivers·-· Graphical JUethod for Parallel RPsistances In U. S. funds. ------- Ganging Volume Controls . 59 Bntered as second-class matter May Correspondence from Members 62 29, 1919, at the 1mst office at Hart­ ford, Connootlcut, under the Act of Operating News . 65 March a. 1879. Acceptance tor mall­ Ing at sl)Oclal rate ot postage pro­ Honor Roll 66 vided tor In section 1103, Act or October 3, 1917, authorized Septem­ Amateur Activities 69 ber ll, 1922. Additional entry at Concord, N. H., authorized Feb.ru­ The Month in Canada 76 ary 21, 1920, under the Act ot F'ebruary 28, 1925. Addltlon,.i seo­ Prisoners of War 82 ond-clasa entries to cover seotlonal lldltlons authorized March 20. 1935. Missing in Action 82 Copyright 1943 by the American Silent Keys . , 82 Radio Relay League, Inc. 'l'ltle registered at United States Patent Ham-Ads . 108 Office. QST's Index of Advertisers UO Section Communications Managers of the A.R.R.L. Communications Department Reports Invited, All amateurs, especially League rnembers, are invited to report communirations activities, training plans, code cls8Ses, theory-cliacullSlon groups, cfrilian-defense buildin! or planning each mid-month (16th of the month for the IIIBt 30 days) direct to the SOM. the administrative official of AR L elected b;Y members in each Section whose address is given below. Radio Club reports and Emergency Coordinator re.Jlorts reeesentmg community organized work and hlans and progress are especially desired by SCMs for inclusion in QS • ARR Fi.-ld Organization appointments, wit the P.Xception of the Emerp;ency CoOrdinator and Emergency Corps ~sts, are suapended for the pre.sent and no new appoint- men ts or cancellations, with the exception named, will be made. T · is to permit full efforts of .all in Emergen~y Corps plane. ATLANTIC DIVISION ,_ .. E'.aetern Pennsylvania W3BES Jerry Math!• 6108 Ma."lter St. Philadelphia Jl .Maryland-Delaware-District 97011\lonroe St. of Columbia W.3ClZ Hermann E. Hobbs SilYer Spring P. O. Linden, Maryland Southern New Jersey W.3GCU Ray Tomlinson 62J E. Brown St. 'Trenton 10 Western New York \V8MC William Bellor 186 Dorsey Rd. Roche~tt•r Vl/e8tern Pennsylvania WSCKO E. A. Krall 703 Broadway East McKeesport CENTRAL DIVISION Illinois* W9QLZ G-e.)1-ge Kd th, Jr. Box 12--A, 1<..f'.D. 2 lTtica Indiana W9EGQ Herbert S. Brier ,335 John~on St, Gary Kentucky W9ARU Darrell A. Downard 116 N. Longworth Ave. Lowaville 12 Michigan W8DPE Harold C. Bird R.F.D. 2 :Pontiac Ohio WBCBI D. C.McCoy Normandy Lane, k. R. 7 Uayt.on \Visco.min W9RH Emil Fdher, Jr. 1625 N. 18th SL .Milwaukee 5 1 ~rtfi--l>akota W9YVF John~1k?c'ti~tle' VISION_4iUWest 12th St. :Sioux Falls, South Dakota :South Dakota W9QVV P.H. Schultz 118 N. Yankton Ave. Pierre Northern Minnesota W9FUZ 1\rmond D. Brattland \V;u Pro<'fuction Training Cilenwood School Southern Minnesota W9YNQ Millard L. Bender 608 N. Huron Ave. >iprlng Valley r>ELTA DIVISION ArkaJlsaa WSGED ,l;:d Beck 250J Bishop St. Little kock Louisiana WSDWW Room 313. J~ersoo Hotel Shreveport Missis~ippi \VSHAV P~\i: r;~1:rn· Jr. $24 Santini St. Biloxi Tennessee W4SP Jam.es B. \Vitt R.F.D. 6. Shady D~ll Trail Knoxville HUDSON DIVISION..._ Eastern New !r.rork W2LU :?.S Crane AYe. \Vhl te .Plai n11 N. Y. C. & Long Island W2AZY ~~t:'1!~:~ht 102 Central •Ave. Massape,J ua, L. I. Northern New Jersey* WlIIN J<>hn J. Vitale 106 Orchard St. I<:tizabt'th MIDWEST DIVISION Iowa WYAED- Arthur E. Rydberg M1tcilellviJle Kansas W9AWP Ai B. Unruh 1617 S. Seneca St~ Wichita '.Missouri* W90UD L~tha E. Allendorf 101 S \Ve!lt Third St. Joplin Nehmska W9PO.B Roy E. Olm•ted 101 -\rikari Av~. \Vauneta NEW ENGLAND DIVISION Connectlcut WIKQY Edmund R. Fraser 48 wdlow St. \\'estHav(!IlT6-.---- Maine* WIAQL (.T. C. Brown 379 No. Main St. Brewer E.:astern Maseachu11ett1 WIALP Frank L. Baker, Jr. 91 Atlantic St. North Quincy 7 I Western Massachusett• William J. Barrett 239 Columbia St. Adame New Hampshire ~fW1 'Mrs. Dorothy W. Evan• P. 0. Box.312 Concord Rhode lsland wrnrlc (:'layton C. Gordon 70 C:'olumbia Ave., Gaapee :f>lateau, Providencf'.' 5 Vermont W!Nl..O Burtis \V. Dean P, 0. Box 81 Burlington __ NORTHWESTERN DIVISION Alaska K7GNN James c;.• Sherry Homer !<laho W7AVP Don D. Oberbillig P.O. Box 486 Hoise Montana W7CPY Rex Roberts Bnx 1088 Gfondh·e Oregon Carl Austin 1137 Federal Bend \Vashington tt~i% O.U.Tatro 513 N. Central Olympia P ...CIFIC DIVISION l{awaii K6ETF Francia TA Blatt 837 16th AYe, Honolulu ;-~~vada W6BIC Edward W. Heim 509 Claremont St. Reno Santa Clara Valley W6!lJZ Earl F. Sanderson 600 Acacia Ave. Ran Bruno East Bay W6T! Horace R. Greer 414 Fairmount Ave. Oakland San f.trancisco W6CIS l(enneth .E. Hughe• 590 35th Ave. San Francisco Sacramento Valley W6MD! Vfncent N. F'eldhausen 113 South Quincy .St. McCtoud fhilippinea KAIG'R George L. Rickard Box 849 Manila San .I oaquin Valley• W6MJW Ralph C. Lowry $15 Santa Barbara Modesto ROANOKE DIVISION______ North Carolina W4CY B W. J. Wortman P. 0. Box .566 ·Morganton South Carolina \V4BQE/ANG Ted Feriuson 1213 Collea:e St. Columbia \'lrginia WJAKN Walter C.