Broadcasting (July - Dec 1941)

MONOTUBE VERTICAL RADIATORS Plus F-M High Gain Arrays (4 Section Turnstile with Approved Power gain of 2.14) OFFER YOU THESE ADVANTAGES: LONGER LIFE V UNIFORM REACTANCE V SIMPLE TO DISMANTLE AND MOVE V GREATER STRENGTH WITH LESS WEIGHT V 65 TO 100 FEET BETWEEN GUY LEVELS V FAST DELIVERY AND ERECTION V LOW MAINTENANCE COSTS V THE IDEAL UNIFORM CROSS SECTION V V ★ ★ ★ # All Monotube Radiators are constructed of a series of guyed double-tapered hollow steel tubes designed and guaranteed to withstand pressures developed during a HURRICANE with wind velocities of 100 mph., a one-half inch ice load, and a temperature change of plus and minus SO degrees Fahrenheit To this is added a safety factor of 3.6 on the steel and 5.0 on the guy assemblies. The articulated joint used between the sections prevents the transference ol bending moments (introduced by wind) from secfion to section, thus placing the point of maximum stress in the center of each isolated section; the stress curve falling off to each end. The taper used in the MONOTUBE sections follows this stress curve, placing the greatest diameter and most material in the center at the point of maximum stress and lessening the diameter and amount of material at the ends at the points of minimum stress. Each MONOTUBE RADIATOR is individually engineered against power and frequency to properly sectionalize the guy cable assemblies against the eighth harmonic thus eliminating absorption, reflection, and directivity in the cables which would otherwise introduce serious distortion in the theoretical field pattern. Insulation in all cases is designed to maintain nonresonance in the guy cables during adverse weather conditions. Our attention to these details in the guycable design makes the MC^OTUBE RADIATORS the ideal units for Directional Antenna Systems. Write for quotation on your antenna system completely erected, painted, and lighted. En-lose frequency, power, and height. Eastern Colleges Plan Training for Technician A HALF-DOZEN New England schools, including Massachuseftts Institute of Technology and Worcester Polytechnic Institute, have indicated they will institute radio technician courses as part of their curricula, according to word received by the NAB from E. E. Hill, general manager of WTAG, Worcester, Mass. At MIT, the courses were instigated by Prof. E. L. Moreland with the support of Mr. Hill and others. At Ohio State U, Prof. Harry E. Nold, director of engineering science and management defense training, has already arranged for a defense training course in applied electronics to begin Sept. 29. The course, of 12 weeks duration, will be open only to college graduates who have majored in engineering and physics and advanced undergraduates who have completed three years of college work in these subjects. The NAB further reports J. Frank Jarman Jr., manager of WDNC, Durham, N. C, has recruited 71 prospective students for a radio training course at North Carolina State. In accordance with the plan suggested by A. J. Fletcher, manager of WRAL, Raleigh, the North Carolina stations are forwarding names of prospects to college officials. Radio Defense Position To Get IRE Attention RADIO'S place in the defense picture, along with discussions of individual engineering advances, will receive prime attention at the annual fall meeting of the Institute of Radio Engineers, to be held Nov. 10-12 in Rochester, N. Y. A highlight of the meeting, according to the program announced recently, will be demonstration of the newly developed RCA "alert receiver". Papers to be presented cover the use of plastics in radio, 1942 civilian radio design, new aspects of radio engineering economics, the research accomplishments of the electron microscope, a method of introducing good synthetic bass response into small receivers, design of solid dielectric flexible R-F transmission line, design of an FM signal generator, new magnetic materials, new advances in iron cores, alternate carrier synchronization in television. Dr. W. R. G. Baker, RMA director of engineering, will present his annual message on Nov. 11. ASSOCIATED Broadcast Technicians Unit of the IBEW has negotiated a contract with KMM.J, Grand Island, Neb., the fifth Nebraska station to obtain a coHtract. Others are KOWH and KOIL, Omaha, KFAB and KFOR. Lincohi. WITH. Baltimore, has announced the appointment of Headley-Reed Co. as its national advertising representative, effective Sept. 15. CONTROlM ROOM A. B. CHAMBERLAIN. CBS ch » engineer, spoke on "Internatior,: Broadcast Facilities" before the C< i necticut Valley section of the Institm of Radio Engineers in Hartfoi Sept. 19. ED ZSCHAU and Congor Reynold formerly of WHIP, Hammond, Ind. Bernard Neher, formerly of WDZ Tuscola. lU. ; Anthony Kowalewski formerly of WEDC, Duluth ; an. William Scharlach, from the De !Moines police department, have joinfi the engineering staff of KSO-KRXT Des Moines. WALLT WHITMAN, engineer o WTRY, Troy. N. Y., is the fattf ,of a baby girl. A. ELLSWORTH COVELL. for merly assistant chief engineer o WKZO, Kalamazoo. Mich., has beci named chief engineer. George Ludtki and Kenneth Moore have been addci to the WKZO engineering staff. GENE ENGLISH, CBS Hollywooi engineer, has been transferred to th' production department. RALPH HICKMAN, chief engmee: of KGNO, Dodge City, Kan., on Au; 1 married Grace Marie Sullivan. GORDON SHERMAN, recording engineer of KMOX, St. Louis, recently married Marie Samelson. FRANK CASTANI, engineer o KMOX, St. Louis, is the father of ; recently-born baby boy, his fifth child HAROLD KNUTE BERGMAN, for merly of WCAD. Canton, N. Y., ha joined WGY, Schenectady. BILL OVERSTREET, technician o KYA, San Francisco, was first mem ber of the staff to bag a buck -wfafi deer season opened in Northern Call fornia. BILL REUTER has been namn transmitter engineer of KIRO, Seat tie. James Upthegrove has been namec studio engineer in charge of mdSnten nance and special events and Orva Steele has been added to the staff o j operating engineers. GLENN R. COLVIN has joined thi' engineering staff of WTAR. Norfolk Ya. EDWARD FRANKLIN, operatioi: director of KJBS, San Francisco, ant Elizabeth Edwards were married recently in San Francisco. ROBERT R. SNOW has been addec? to the engineering department ot WMBD, Peoria. CHARLES K. CHRISTMON, studic engineer of WAIR, Winston-Salem' N. C, leaves Nov. 1 to join the Britist Civilian Technical Corps in London. L. G. WOODFORD has been ap' pointed chief engineer of AT&T. Fori merly an assistant vice-president, ht has been in charge of operation am engineering since .July. 1940 in tb( absence of AY. H. Harrison, vice president, now in Washington as dij rector of the OPM production divisionL, TOM HANLON, CBS Hollywood an nouncer. is cast in a similar role ii the MGM film. "Babes of Broadway,' now in production. Washtitgtt^n's Own Station lirfN WA&HJNGT'&Jf W^TH\W^ WINX BUILDING • WASHINGTON, D. C. '^^ RA^S CONSTRUCTION CO. MM *» MIp CLEVELAND. OHIO DISTRIBUTORS AND ERECTORS ptember 22, 1941 Broadcast Advertising • BROADCASTING