Radio Broadcast (May 1928-Apr 1929)

04 RADIO BROADCAST ADVERTISER The New Victoreen A, C. Circuit Is the Outstanding Success of the Year Vital improvements in Victoreen R. F. Transformers, together with changes in the circuit itself, have still further perfected and simplified a "Super" which for years has had no superior. The New Victoreen is simply marvelous. Here you have A. C. operation at its best. Tone quality such as you have never heard before — selectivity such as you never dreamed to be possible — simplicity of assembly developed to the point where anyone can construct a set which is as nearly perfect as human ingenuity has been able to devise. The heart of this new Victoreen circuit is of course the world famous Victoreen R. F. Transformer— greatly improved in efficiency, with binding posts located for maximum convenience in wiring. Each transformer is individually tuned to a precision of less than J/3 of one per cent, by the Victoreen patented method. These new Transformers, together with the other Victoreen components which are used in this remarkable set, are literally years ahead of their time. To get the results which only Victoreen gives, either build, or have built for you, a Victoreen Super. Blue Print Free, together with full constructional details. Write for it to-day. For the iMosl 'Perfect Results from the Victoreen "Super" use the Victoreen "B" Power Supply Supplies 45, 90, 180, .and 450 volts, using a UX 210 or 250 in the last stage. Contains two voltage regulator tubes so that the 90 and 180 volt taps are supplied with a constant volt potential. It is the last word in "B" supply. For the most satisfactory results you must have it. Free Blue Print, with list of parts and complete assembly instructions, will be sent upon request. The Geo. W. Walker Company ^Merchandisers of Victoreen 'Radio Parts 2825 Chester Ave., Cleveland, Ohio Vtctoteen Q u a I t y 1{a d i o 'Tarts TROUBLE? If your receiver or power pack refuses It to function as it should our Service Department will repair it for you for the nominal charge of from §5 to $10 depending upon time consumed. Set Building Economy Why not have your dealer send us your kit so that we may wire it for you. The amount you have probably already saved on the purchase of your kit coupled with our moderate charge for wiring will appeal to you as a sensible and economical proposition. Write us for rates, etc. And remember, we guarantee either the repair or wiring service. We are equipped to build and repair the SM Screen Grid Six, Sargent-Rayment Seven, Hi Q, LC-27, 28, Universal, etc., etc., etc. Our experience with Television also enables us to offer our workshop to build any Television Kit you desire. For further details address SILVER RADIO LABORATORIES 2114 Mapes Ave. New York, N. Y. nee A Vitrohm 507-109 Unit installed on your radio set lengthens the life of the a.c. tubes by automatically lowering the filament voltage. This unit costs only $2.00 — a small investment if one set of a. c. tubes is saved. Write for free information on the complete line of Ward Leonard Radio Products. WARD LEONARD yg&ol ELECTRIC CO. new york 71 HOOK-UP WIRE "The Braid Slides Back" EXCELLENT FOR ALL A-C WORK Can Be Easily Twisted For Filament Leads BRAIDITE is as safe as insulated wire and as convenient as bare wire. BRAIDITE twists easily and holds its shape permanently after bending. It's quick and easy to work with, cutting wiring time in half. To make a connection, simply shove back the insulation. After soldering, the insulation slides right back into place, leaving no exposed sections of bare wire and making the neatest and most workmanlike looking job. At All Dealers 25 Feet Stranded 35c 25 Feet Solid 30c Red, Green, Yellow, Blue, Black FRFF Send us the name and address of your dealer * * and we will send you a sample package of Braidite FREE. Include ioc for postage. CORNISH WIRE CO. 38 Church Street New York City -wflJ2J3.fi g.CLgJLf Jenkins & Adair Condenser Transmitter For Broadcasting, Phonograph Recording, and Power Speaker Systems H^HIS transmitter is a small condenser which J varies its capacity at voice frequency, and is coupled direct into a single stage of amplification, contained in the cast aluminum case. The output, reduced to 200 ohms, couples to the usual input amplifier. The complete transmitter may be mounted on the regulation microphone stand. It operates on 180 v. B and 6 or 12 v. A battery. This transmitter contains no carbon, and is entirely free from background noise. Its yearly upkeep is practically nothing. It is extremely rugged, and will withstand hard usage. Price, complete with 20 ft. shielded cable, $225.00 F.O.B. Chicago. J. E. JENKINS & S. E. ADAIR, Engineers 1500 N. Dearborn Parkway, Chicago, U. S. A. Send for our bulletins on Broadcasting Equipment