Blueprint Section Every Month WD1O GE LeMaga3ine òf the Hour January Blueprints of a "B" Battery- Eliminator `:Taking Care of 25P 1926 your Radio Set fl, New data on the Photo Electric Tubes OOHow Rebroadcasting 6326 is Handled Radio Age Model Receiver Type - H X 7r. íßi ; ? - >i.:e TIDE BIG LITTLE THINGS OF RADIO The DAVEN LEAK - ANDENSER -the new com- THE DAVEN SUPER - bination grid leak and grid con- AMPLIFIER eliminates all hook -up denser all in one For any detec- prefer to assemble, tube circuit. labor. For those who tor the Type 3-K Kit is complete except for sockets. For 50% more volume use the new Daven Tuhes Type MU -20 with the Daven Super -Amplifiers. Daven Power Tube Type MU-6 -for the last stage of any set. Volume and Quality AS an owner of a radio set you should demand two things: (1) Volume on the weakest signal, (2) Tone quality that makes criticism impossible and excuses or qualifications unneces- The biggest of all sary. Why sacrifice one for the other? Demand both. Today it is the little things -THE DAVEN GRID LEAK. Made a simple matter to have both. in 29 standard values from 2500 ohms to 10,000,000 ohms. It is easy to get volume but there is only one way to get both quality and volume. Use Resistance Coupled Amplification in the audio end of your set. We have made this very simple by developing the Daven Super - Amplifier. Or, if you prefer self -assembly, couple up Daven precision -built resistances and mountings as contained in the Clip Mounting No. 50 -suitahle for single 3 -K Kit. Then you will hear radio at its best. ResistororGrid Leak. Three new Daven Products were announced this Fall. The Daven Leakandenser is a Daven grid leak of permanent and constant value, combined with a grid condenser of fixed capacity, correct for all makes of detector tubes. Precision -built, simple, effective, uniform ( esisto- Coupler No. and very handsome. A pair of mounting clips included. 42,with special Daven Type "A" Coupling The new Daven High MU Tube Type MU -20, used with the Daven hidden in Super-Amplifier, is designed to give 50% more volume -6 volt, 1/4 ikkCondenserthehase- the original Tube MU -6 is the and most popular re- ampere. The Daven Power Type for use in last or sistancecouplingunit. output stage of any set regardless of the method of amplification used -6 volt, t2 ampere. The new Daven Special Type "A" Condensers are the latest develop- Daven Ballast Resist- ment of Daven Engineers. Their use in Resistance Coupled Ampli- ors-for use with am- fiers gives you 50% more volume than ordinary plifying tuhes in place condensers. of rheostats. There are five sizes, for one The Resistor Manual is the `rA.B.C." of Resistance Coupled Amplifi- tofivetuhes. Soldwith cation-a complete handbook for designers and builders. Send for it. mounting only. HAVEN PRODUCTS ARE SOLD ONLY BY GOOD DEALERS (, wie Sae f./1tcite" New Daven Spe- cial Type A" Coupling Conden- AVE ADIO CORPORA 10 ser increases vol- ume with Resist- ?esis %t- Specialists ance Coupled Am- Newark Reg. U.S. Pat. 05. New Jersey plification. Sold CLIP TITIS COUPON The Resistor DAVEN RADIO CORPORATION, 157 Summit Street, Newark, New Jersey. separate, and also Manual send included in all Re- Please me the following on Resistance Coupled Amplification: - A practical handbook nn Cheek One sisto- Couplers, Resistance Coupt.d Am- Resistor Manual. 30c is enclosed. Complete Catalog (free). v, Super - Amplifiers plification. At yourdo1d- Name Address and Kits. er's25c. Bymaispoñt , tid 30c. Dealers send for free sample. To Dealer ,.: May we have our nearest distributor communicate with you? * Tested and Approved by RADIO AGE RADIO AGE for January, 1926 The Magazine of the Hour 1 How I Earn $1009.2 aWeek as a Radio Expert A year ago I was mighty blue and It s a new field and there's plenty of a low -paid clerk in a bank. And Marian, discouraged. It seemed to me that I room for wide -awake men." who will soon be my bride, keeps saying, would never be more than a low -paid "But -but I'm not trained!" The "I told you so!" bank clerk. Of course I had a small thought excited me. To be a radio As a radio expert I can tell you that increase in salary every now and then, expert! To find my future in this there is a tremendous demand for men but I knew that pretty soon I would fascinating new field! "1 don't know who can build, sell and install radio reach my limit and there would be no anything about it, Marian," I said. sets, who can design, test, repair. Men further advancement for me. What "I wish I did, though." are needed as engineers and executives, future had I to look forward to? Where "Well, why don't you find out about all over the world. The opportunities would I be in five years? I became it," she retorted. "You can't learn are limitless, and if you like radio there restless and discouraged and began to about radio just by listening in to the is no reason why you cannot qualify look around for some other opportunity. concerts. Why don't you take a course ?" for one of these positions by studying It was then that I discovered that the But we found out that most courses in your spare time at home as I did. demand is for trained men, that the were expensive or that they would The National Radio Institute offers opportunities are all for men who can interfere with my other work. We an absolutely complete course which do some one thing better than anything were about discouraged when I dis- prepares you for the Government First else. There were wonderful oppor- covered that through the National Class Commercial License and for the tunities for men who were experts or Radio Institute it is possible to become bigger -paying jobs in Radio. The specialists -but I was --a clerk. How a radio expert by studying right at home Director, E. R. Haas, will be glad to I regretted then that I hadn't prepared in spare time. I told Marian about it and send you all details of their marvelous myself for some definite career! she was elated. "Send off for informa- new method of practical instruction, I Wanted to Marry tion, at once -today!" she exclaimed. including information concerning the Advances Quickly to $100 a Week Free Employment Service which secures The thing that made me more restless positions for National Radio Institute at that time than anything else was the I did, and the following day received graduates. Everyone interested should fact that Marian and I were -that is, an important booklet, "Rich Rewards radio op- have this information. Its free, and we wanted to be married. But we both in Radio" telling all about this coupon will bring it to you. I knew that we couldn't possibly get along portunities and how to become an ex- work. advise you to send it off today. Radio on my small salary. I f only there was pert in any particular phase of the is a new and interesting field, and it something I could do that would bring Here was my opportunity at last! offers you more money than you prob- me a larger salary! I began to study in all my spare time. ably ever dreamed possible! It was just about the time that every- It was the most interesting and absorb- one became so interested in radio. Our ing study I had ever made. The secret Important whole town became radio -mad, and of of the radio revealed to me! Day by Those who mail the coupon at once course what was happening in our town day I became more skilled and deft will also receive details of Special Short was happening all over the country - until I was able to take apart receiving Time Reduced Rate. Do it now. all over the world. I managed to save sets and put them together again as up enough to buy a receiving set I though I were playing with a toy. It and 1 National Radio Institute, Dept. AÚ3 was never quite so happy as when I was fun! In a month I was able to I Washington, D. C. was trying to tune in on stations. take a position as lineman at a bigger I am interested in radio and would like to Ifind out whether or not I am suited for a radio The thing fascinated me. Playing salary than I was getting at the bank. career. Please send me, without the slightest with air waves! Bringing melodies and This was wonderful experience for me, obligation, your interesting free book called "Rich messages out of the sky! I was never and I kept right on with my studies. Rewards in Radio." Also full details concerning I special Short Time offer. so interested in anything before. It wasn't long before I qualified for a your Marian was the first to sense the great position as radio engineer at a salary of Name opportunity. "Why don't you become $100.00 a week! That is what I am a radio expert ?" she said. "You like earning now, though I expect to make Address _.. it, and I am sure there must be a big more soon. It seems to me almost too demand for men who understand it.