Radio Broadcast (May 1928-Apr 1929)

Record Details:

Title:
Radio Broadcast
Date:
May 1928-Apr 1929
Publisher:
Garden City, N.Y., Doubleday, Page & company [etc.]
Volume:
Radio broadcast ..
Leaf #:
000191
Language:
English
Subjects:
radio periodical, Radio -- Periodicals
Contributor:
Library of Congress, MBRS, Recorded Sound Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Description:
Radio Broadcast supported home listeners of the new technology of radio – for building or buying a receiving set to explaining the technology used by the new radio stations. Throughout the magazine shows the cultural influence of radio as it evolved from hobbyist to mainstream. -- David Pierce, 2011
Date Added:
July 18, 2024
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RADIO BROADCAST ADVERTISER 175 AmerIran PF-250 Power Transformer for UX 250 Power Tubes A husky transformer built for doing the job, not for looks. The PF-250 is rated at 1200-600 volts plate, 7'2 volts power tube, 7% volts rectifier tube filament. Center taps are provided on each of the filament windings. Continuous rated capacity of plate windings, 160 MA., continuous rated capacity of each 7lA volt winding, B 3 Amperes. DC plate output with two UX 281's full wave, up to 450 volts with sufficient excess for "C" Bias. AERO Corona Coil Used in New Cooley "Rayfoto" Of course the new Cooley "Rayfoto" uses an AERO Inductance Coil, This special coil is designed to meet the exact specifications of A. G. Cooley, whose "Rayfoto" receiver so many experimenters will build. For every inductance requirement AERO Coils are proved best — by experts and amateurs as well. Always specify AERO Coils if you want the finest in radio performance. AERO PRODUCTS, Inc. 1722 Wilson Avenue Chicago, 111. NATIONAL. CO. INC., Announces A new precision Dial with type A Velvet Vernier Mechanism, German Silver face and precision Vernier, for ShortWave Radio Use. A new Short-Wave Condenser, built on the NATIONAL Girder Frame with pigtail and wide spacing for high voltages. A new 2Q00 volt Transmitting Condenser, Fyrex Insulated. Write us for Bulletin B-130 National Company Inc. W. A. Ready, Pres. Maiden, Mass. Quality PRODUCTS Approved Parts Transformers, Chokes and Condensers For the New UX #250 Power Amplifier Tubes For the popular new UX #250 P. A. Tube Dongan laboratories have perfected a complete line of power unit parts. You can assure yourself of the maximum in performance with the proper Dongan parts, designed especially for use with this tube. Illustrating No. 1177 Output Transformer. Chokes and Condensers are also mounted in matched cases similar to the one shown here. Description of the Dongan Parts, used with the UX 250 Tube, is given in detail in this issue of Radio Broadcast. ^7568 A power supply transformer. 177 A straight power amplifier output transformer. #1 #1 176 An output transformer for push pull amplification, designed for all types of dynamic speakers. Condensers and Chokes for the complete Filter Circuits Set Manufacturers and Custom Set Builders You are invited to consult the Dongan engineering department for any desired information for your particular requirements. Production on all types assures satisfactory deliveries. See our Exhibit— Booth 152 — R. M. A. Show DONGAN ELECTRIC MANUFACTURING CO. 2991-3001 Franklin Street Detroit Helpful Technical Information A regular feature of Radio Broadcast is the series of Laboratory Information Sheets, which cover a wide range of information of immediate value to every radio worker, presented in a form making it easy to preserve them. To insure your having every issue, send your check for #4.00 for one year's subscription, to Subscription Department, Doubleday, Doran & Co., Garden City, N. Y. RADIO PANELS BAKELITE— HARD RUBBER Cut, drilled and engraved to order. Send rough sketch for estimate. Our complete Cataloff on Panels, Tubes and Rods — all of genuine Bakelite or Hard Rubber — mailed on request. STARRETT MFG. CO. 521 S. Green Street Chicago, 111. V. Cart* to e 11 Conbeti£er£ ARE RUGGED SIMPLE — STRONG They are used and specified by the leaders— ■ the Giants of Radio — not where a few pennies count in meeting competition, but when performance is a serious business and reputations are at stake. Need we suggest the reason ? RECEIVING CONDENSERS TRANSMITTING CONDENSERS Write For Literature or State Your Requirements JElje alien 23. Carutor.ll jfflfg. Corp, 81 Prospect Street Brooklyn, N. Y. Dept.B