Radio age (Jan 1927-Jan 1928)

52 RADIO AGE for January, 1927 The Magazine of the How re Semi For It TO-DAY This 84 Page RADIO BOOH swm The Guide to Radio prices and Radio Quality. Our vast resources and radio experience have been utilized to assemble in one gigantic institution, the best and newest things in radio. The Randolph catalog isthe great radio market place — a masterpiece of merchandising that befits our house — The World's Largest Exclusive Radio Mail Order House CATALOG CONTAINS OVER 1000 ITEMS, from the most beautiful, fully equipped console radio set, down to the smallest part or tool for the set builder— kits, parts and supplies of every type and style. All beautifully illustrated and interestingly described. Also valuable data of today's most fascinating and most wonder* ful achievement — RADIO. 5-TUBE SETS AS LOW AS $24.9® LATEST 1927 MODELS All Randolph sets are sold at amazingly low prices. No matter what kind of Bet you want— no matter how little _ yoa want to pay-yon can select YOUR SET AT YOUR * PRICE from the Randolph catalog. ■ Randolph Radio Corporation WE SAVE YOU MONEY "SffSSi" I 180 N. Union Ave °Dept"2?7 ChTca'go, 111. and s-11 a tremendous volume of everything in Radio, we ■ Send me — free — yOUT 84-page. 1927 Radio can concentrate our buying power for the benefit of our J R00k re. customers. ■ fc SEND FOR BOOK TODAY SUKaSgStS Name this wonderful Radio Book. Simply send letter or postal I and this bargain catalog of guaranteed radio sets and I supplies will come to you absolutely FREE. , Street and No RANDOLPH RADIO CORP.! r.f.d. Box 180 N. Union Ave., Dept.217 Chicago, III. I I City State DOUBLE ADJUSTMENT PRIMARY MIO'-'OIIPLER LIVE DISTRIBUTORS WANTED T5ESULT8 in easier tun ..olfl.r'ty— greater stability Indorsed by leading radio authorities. Model N" A slight turn obtains correct tube oscillation on all tuned radio frequency circuits. Neutrodyne. lioberts two tube, fer's Knockout, etc., ca pafarads. Price $1.00 Brown -Drake, McMurdo £ Model "C With grid clips obtains the proper g oapacity on Cockaday circuits, fil and intermediate frequency tuning heterodyne and positive grid bias in Capacity range: Model G-l .00002 to .0001 MFD. Model G-5 .0001 to 0005 MFD. Model G-10. 0003 to .001 MFD Price $1.50 X-L Pu.h Post Push it down with your thumb, ir wire, remove pressure and wire is fir held. Releases instantly. Price 15c. Also furnished seven to a strip. Nicely marked in with seven standard markings. Price $1.50. Information on ReQuegl X-L RADIO LABORATORIES 2424 N. Lincoln Ave. Chi THE £ t rE^s>eRe. BALL BEARING pAresL <».!£%% MlCMPlt Cives Wonderf nl Results, Selectivity, Volume, Dx. THE MOST EFFICIENT METHOD of Coll Coupling Ever Devised. Positively Controls Oscillation, Eliminates Squeals Write for Full Description SIMPLEX RADIO DEVICE, Inc. 231 Mulberry St. Newark, N. J. as usual CARTER PARTS are specified in the important circuits of the year including Worlds Record Super 8 Hammarlund-Roberts Improved Browning Drake L C— 27 (Popular Radio) and the others In Canada— C Any dealer can supply Radio Co., Limited, T< Scientist Proposes Big Rockets to Attract Lightning AN interesting modification of Benjamin Franklin's celebrated experiment of drawing down lightning on a kite string has been proposed by Dr. C. V. Boys, famous English physicist now living in well-earned retirement after a lifetime of distinguised service as a teacher. Dr. Boys proposes that rockets be sent up into a thunder cloud to see whether a flash of lightning will then follow the track of the rocket, either downward to the earth or upward from the earth to the cloud. Experts on lightning are disagreed about what starts the flashes and about what determines the path of a flash. The track of a rocket contains, Dr. Boys points out, a multitude of electrified atoms, discharged as the explosive burns and drives the rocket upward. Knowledge of whether or not lightning would instantly follow the electrified channel thus created through the air might tell us much, Dr. Boys believes, about the nature of lightning. To touch off such a rocket-borne invitation to a lightning flash might not be, Dr. Boys admits, the safest occupation in the world. He suggests a long string attached to the fuse of the rocket and pulled by a person lying flat on the ground at some distance from the point where the lightning would be likely to strike. FBEfi !» pjtf'BT^% *^ ^a^galD, direct from factory. Coast toCeast range. I.-, ilW, ■,; , Doo't buy unless 30 days trial _ Miraco ' Compact ' * outper , tonni WBtly 6 and 7 tube seta ■ l "i ii ii "'i ■ ' >' > ' i V i'i User-Agents Wanted. MIDWEST RADIO CORPORATION Pioneer Builders of Sets S23-ZMiracoBldg.,Cincinnati,0. ' ■■PATENT YOUR IDEAS Ml Inventions developed. Patents secured in the U. 8. and Foreign countries. Satisfactory Terms. Write, call or phone HANOVER 3662 for confidential advice and InRecording Blank. Please Mention Radio Age When Writing to Advertisers.