Radio Broadcast (Nov 1926-Apr 1927)

Record Details:

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RADIO BROADCAST ADVERTISER 113 Sheet Copper for Shielding Shielding Prevents aerial radiation and feedback. Insulates against interference from adjoining circuits. Improves efficiency, selectivity and tone quality. USE SHEET COPPER because it combines low resistance with easy working qualities. COPPER & BRASS RESEARCH ASSOCIATION 25 Broadway — New York HI Resistance-Coupled ^PERFECT AUDIO AMPLIFIER"; 5i Provides .audio amplification njm with minimum distortion. Bradleyunit ■ molded resistors used in the Bradley-Amplifier ■ do not vary with age and are not affected by atmospheric 3 m^ conditions. Can be used to replace transformer amplifiers ^ «^ in standard radio sets with decidedincreaseintonequality. c ^gsn-Bra^ Co. mm Electric Controlling Apparatus JJ* 278 Greenfield Avenue Milwaukee, Wis. W.V.V.VV.V.W.V.VV-VV.W See that rubber jacket about to descend on the "howler" ? Once this "howl absorber" slips over a tube the howl stops for once and all! No more ruined reception. The thick shield of live rubber effectually soaks up the trouble-making vibration. You can get it for every size tube! Just ask your dealer, or write. Sole Selling Agents for the U. S. A. SPARTAN ELECTRIC CORPORATION 350 West 34th Street New York City Manufactured in the U. S. A. by SCIENTIFIC PRODUCTS, CANADA, LTD. Price 75c * Ask for McDonald Howl Arrester Examined and approved by Radio Broadcast