Radio Broadcast (Nov 1926-Apr 1927)

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RADIO BROADCAST ADVERTISER 103 JEFFERSON (~bn ce ri o ne, (al-2 seai,ed)aidio frequency transformers THE Jefferson "Concertone" is one of the few transformers built with core and windings that are sufficiently large as well as heavily insulated for safe and continuous use with the new power tubes. $6.00 each at your dealer's. Similarly, Jefferson No. 358 Chokes are particularly adapted for use in the output circuit by reason of their extremely low D C resistance and their ample current carrying capacity. $5.00 each. Make any set a 1927 model in quality of tone, merely by replacing present transformers with "Concertones." WRITE FOR LATEST LITERATURE on these and other Jefferson Guaranteed Radio Products. Mthoufremovingyour „ tubesjromtheset — ~**=^B&^ KEEP TUBES LIKE NEW-CHARGE THEM MONTHLYWALLATONCE Tubes gradually weaken with use, as do batteries. Once a month attach Jefferson Tube Charger to light socket and connect with set for 10 minutes. Keep 201-A or 199 type tubes like new — at full efficiency. Rejuvenates run-down tubes. Improved reception with longer life of tubes and batteries will be worth many times the price to you. Guaranteed, and made only by Jefferson. JEFFERSON TUBE CHARGER $3.50 Makes it easy to ;regularly charge tubes, all at once, in your set, at home. Enjoy top-notch reception every night. Get one from dealer. Jefferson Ete^ric Mfg. Co. ly^y|) of small transformers ' CHICAGO, ILL. U.S.A. fgrgest manufacturers 507 SO. GREEN ST.' RADIO FANS, a one-year's subscription to Radio Broadcast will cost you four dollars, two years six dollars. Consider this expenditure as being a necessary investment on your part for the future development of your own knowledge of Radio. BRING IN EVERY STATION ON THE AIR WITH A \jQriaenstnq ANTENNA An aerial that can be erected on wall, chimney or roof, anywhere 5 foot square is available. Provides sharper tuning, increases selectivity and is non-directional. Twelve highly conductive feelers reaching out in all directions have the capacity of long single wire. Perfect insulation prevents losses. Can be Erected and dismantled quickly. A single upright to erect, hammer and screwdriver the only tools needed. No. 2, 8 foot pole ready to install, full instructions $12.50. Get a Wave-X now. A strong hand turned rock maple pole 5 or S foot lengths. Fits any roof. Will carry heaviest sleet covered single or multiple wire antennas in strong wind. Complete, guy rods, neb irons, roof sockets, anchor pins ana full instructions. 5 foot mast $3.50 each. 8 foot $4.25. Ask your dealer. DEALERS Wave-X and Redi-Mast are quick sellers. Write today for our dealer offer. THE THE ZINKE CO. PRESSED METAL 1 1323 S. MICH. MFG. CO. CHICAGO WAUKESHA, WIS. GROUND ?5HE <DIAL With The Mii'Rdd Super Six Receiver Long winter evenings, a log on the hearth, a companion at your side — full contentment, quiet romance — into this picture fits Mu-Rad. Its beautiful tonal qualities, its faithful reproduc tion, the simplicity of operation and its perfect performance will thrill you to your fingertips. Operated by just one dial this remarkable receiver presents a simple solution to your radio problems. Ask your nearest dealer for a MuRad demonstration. The Mu-Rad plan for exchanging old sets for new yearly models will make efficient radio a permanency in your home. MU-RAD B. Asbury Park New Jersey ACROSS 15HE CONTINENT Why not subscribe to Radio Broadcast? By the year only $4.00; or two years $6.00, saving $2.40. Send direct to Doubleday, Page & Company, Garden City, New York. L C. A. PANELS for RADIO BROADCAST and All Popular Circuits No matter what Radio Broadcast circuit you plan to build — Universal, Aristocrat, L. C. Cockaday 27 or "R. B. Lab." — use an I. C. A. Panel for artistic effect and insulating efficiency. In Insuline and Bakelite, black and wood finishes, for the above and all popular circuits. Drilled and decorated ready for you to sei up. Write ^ for Free Booklet B 11, describing I. C. A. Panels, Sub-Panels, Mounting Brackets, etc. for all popular circuits. Don't ta\e substitutes. If your dealer can't supply you wnte us direct. INSULATING COMPANY OF AMERICA, INC. 59 Warren St.. New York City ■jf Examined and approved by Radio Broadcast