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Blueprint Section Every Month How to Make A Tube-Tester A Power_ Supply Receiver An Improved Reinartz A Six -Tube Portable Set Other Up -to -the- Minute Articles MA ENT FAVORIT 55__ They Cost More But They Do More The complete Zenith line ranges in price from $100 to $475. Zenith With either Zenith 3R or Zenith 4R, sat- isfactory reception over distances of the exclusive choice 2,000 to 3,000 miles is readily accom- plished, using any ordinary loud of MacMillan for his speaker. Models 3R and 4R licensed un- North Polar der Armstrong U. S. Pat. No. 1,113,149. Expedition They are NON -RADIATING. Zenith 4R - - $100 Zenith 3R - - $175 Super - Zenith X- The new Super -Zenith is a six -tube set the ideal radio set with a new, unique, and really different for the fine home patented circuit, controlled exclusively by the Zenith Radio Corporation. It is NOT regenerative. SUPER -ZENITH VII - Six tubes -2 stages tuned frequency amplification - detector and 3 stages audio frequency amplification. Installed in a beautifully Zenith Supremacy finished cabinet of solid mahogany - 44rs inches long, 16ii inches wide, 10': inches high. Compartments at either end for dry batteries. Price (ex- will be Maintained elusive of tubes and batteries) $24O SUPER -ZENITH VIII- Same as VII ex- This message brings to radio en- for the makers of that product a cept- console type. Price (ex- elusive of tubes and batteries) $260 thusiasts the announcement of an standard of supremacy which, in advance in Zenith prices on all duty to the public, they are obligated SUPER -ZENITH IX - Console model The new prices are shown to maintain. with additional compartments contain - models. ingbuilt-in Zenith loud speaker and gen- in the panel at the right. Throughout the radio world the erous storage battery space. Price (ex- clusive of tubes and bat- Radio sets -like motor cars and name ZENITH has come to be the teries) pianos -gravitate to their correct very symbol of results -in quality of price level. There is more to a radio tone, in simplicity, in selectivity, in SUPER -ZENITH X- Contains built -in, patented,Super -Zenith Duo-Loud Speak- receiving set than merely a beauti- volume without distortion, and in ers (harmonically synchronized twin ful cabinet backed by extravagant long -distance reception. The artistry speakers and horns), designed to repro- meet exacting re- of design for it is too duce both high and low pitch tones claims. It must which stands otherwise impossible with single -unit quirements. The novelty has worn well known for comment. speakers. Price (exclusive of 71 off. The public is becoming edu- The fact that ZENITH has ad- tubes and batteries) $4 ( 5 cated. It knows what to expect and vanced its prices is of more than Prices F.O. B. Factory. can now distinguish merit in radio. passing moment. For it registers the All An imposing name and an intensive determination on the part of the advertising campaign -when they builders of ZENITH to maintain back a radio product which does not the acknowledged supremacy of deliver equally impressive results - ZENITH receiving sets -both in soon lose their fictitious values. beauty and performance. ZENITH RADIO CORPORATION Dept. C-5 By that same token, performance All present models are guaranteed 332 S. Michigan Ave., Chicago, Ill. which is literally outstanding fixes against price reduction. Gentlemen: Please send me illustrated liter- ature about Zenith radio. Dealers and Jobbers: Write or wire for our exclusive territorial franchise. Name Zenith Radio Corporation Address 332 S. Michigan Ave. Chicago, Ill. J 2 Tested and Approved by RADIO AGE ' RADIO AGE for May, 1925 The Magazine of the Hour 1 O Else Wants $5 t PROOF! $405 In One Month I cleared up $405 in one month recently. Do short hours, big money and easy Not so bad-is it -for a fellow who just com- pleted your course a work appeal to you? short time ago. I sure have been coining the dough, I never will IGHT now thousands of men are best obtainable at any price. The whole regret the money I "cleaning up" in Radio. Right on success of the Institute is based on its paid for your course. this page you can read the signed state- advanced methods. This is the ab- Emmet Welch, Peculiar, Mo. ments of men who have made big money solutely complete course now being in this "wonder- field." Men, who, a few offered which will qualify you for a govern- months ago, knew nothing about electricity ment first -class commercial license and From $15 to $80 a Week or Radio now hold fine positions and earn really get you one of the bigger paying Before I enrolled more money in one week than they used jobs in Radio. with you I was mak- to get in a month! ing $15 a week on a farm. Now. I earn Every day thousands of Radio sets Free Instruments from $2,080 to $4.420 are being sold; broadcasting stations are a year and the work The Institute furnishes free of charge all is a hundred times being established; Radio stores are spring- instruments necessary for practical in- easier than before. ing up everywhere. People all around Since graduating a struction at home -you "learn by doing." little over a year ago. you are getting rich in this splendid - That is one reason why National Radio I have earned almost paying profession -Why Not You? $4.000 and I believe the course will be Institute graduates get ahead so quickly, worth at least $100,000 to me. You can train for this "big-money" and obtain the Government License easily. (Signed) George A. Adams. field in your own home -in a little spare Tamaqua, Pa. time. No electrical experience is neces- Send for "Rich Rewards sary. Men and boys of all ages-14 to 60, Triples Salary have mastered this famous course in a few in Radio" and Special months. What others have done, you can Short -Time Offer I am earning three do. times as much as be- book will tell you the fore enrolling and I Radio has come to stay. It is the fastest This interesting have clean interesting growing industry in the world today. But full story about the wonderful opportuni- work that takes me to in Radio. You will see for yourself all parts of the globe. remember -the "cream" will go to the ties I tell you, boys, it's just how much you can expect to earn in Radio for me. shrewd fellows who get in on the "ground Arthur Berke, floor." Employers are constantly writing this great profession. It will tell you of the Vancouver. B. C. to the National Radio Institute asking for adventure and big money that awaits the Radio Operators, Salesmen, Radio Engi- ambitious man in this fascinating field. at once will be Earns College Education neers, Radio Mechanics, Broadcasters, etc. Those who mail the coupon Many of our students, even before com- offered a special reduced I entered the mari- pleting their course have received offers of rate, Act promptly and time service of the save money! Send Radio Corporation of fine positions at twice their former salary. to- and served day for this free book America In fact, most students make so much Rl several months on and our special short P +ca;s board ship. I not money in their spare time on Radio work .n only had the advan- Becomes Practically Free. time offer. no, tages of visiting foreign that this Course countries at no cost to me, but I was also Secret of this NATIONAL RADIO able to save enough What Is the money to pay for my tuition to college. INSTITUTE G. E. Rogers, Amazing Method? Troy. N. \ The National Radio Institute Course is Dept. 53GB l acknowledged by Radio executives to be the Washington, D. C. ! National Radio Institute, Dept. 53 GB, FREE Instruments Washington, D. C. I Send me the book, "Rich Rewards in Radio," whica I tells all about the opportunities in Radio, how spare time impractical trainingathome I study at home will qualify me quickly as a Certified - I Radio- trician so I can get one of these splendid positions. I and how your free Employment Service helps me to I secure a good position. Also, details of your Special I Short Time offer. Name-. - ......___ These parts with instruc- This is the world- famous Natrom- t mis are given for experi- These parts with com- eter of the three instruments -one ence and practical training plete instructions are Address"_._.._.... »_ ___......_.._.._._ given for scientific and practices in making and operating given for practice in home training in mastering the regenerative receiving ap- building a receiving code. paratus. set of the more simple kind. -F Tested and Approved by RADIO AGE © C1B657753 3 RADIO AGE for May, 1925 The Magazine of the Hour A Chat With a IC) OZ the Editor The Magazine of the Hour Corporation of America, Established March, 1922 it appears, is not at all in a WITH WHICH IS COMBINED RADIO TOPICS RADIOhurry to submit proof that this magazine is not entitled to the use of the name which we have been using Volume 4 _flay, 1925 Number 5 for more than three years. Radio Cor- poration, with great show of moral in- dignation, went into the United CONTENTS States Patent Office at Washington Cover Design by Fred I. Good last Fall and made formal protest against the registration of the title Radio Editorials 4 "Radio Age," which name we had Where the Howls Come from 7 sought to have officially enrolled as By Frank D.