Radio Broadcast (Nov. 1925-Apr 1926)

Page scan 000753 from Radio Broadcast

Record Details:

Title:
Radio Broadcast
Date:
Nov. 1925-Apr 1926
Publisher:
Garden City, N.Y., Doubleday, Page & company [etc.]
Volume:
Radio broadcast ..
Leaf #:
000753
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:
August 01, 2024
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RADIO BROADCAST ADVERTISER Type BD1-A NATIONAL TUNING UNIT Embodying the genuine Browning-Drake Inductance Coil and the NATIONAL Condenser The New NATIONAL EQUICYCLE Condenser The latest development in straight line frequency control as applied to NATIONAL Condenser design. Increases range of rotation from i8o° to 270°, permitting more precise adjustment and sharper separation of stations, and accomplishes this WITHOUT GEARS, CAMS, OR LEVERS. It changes a mob into an orderly procession Type BD2-A NATIONAL TUNING UNIT Embodying the genuine Browning Drake Transformer and the NATIONAL Condenser and lengthens the line of march! (Patented February 10, 1925) Tests Conducted at Harvard University, by Prof. Field, give characteristics of the new Equicycle Condenser as indicated by the following graph : 1500 — The novel shape of the plates spaces the station groups at equal intervals of 10 kilocycles (as specified by the U. S. Department of Commerce) in a true straight frequency line. 1000 500 NATIONAL VELVET VERNIER DIAL C.Condenser*270MAf.F. L.Coil =3/5 M.H T Tube lit with plate loaded Measurement Made Under — Operating Conditions. — The same electrical efficiency and mechanical ruggedness that have always characterized NATIONAL DX Condensers have been embodied in the new NATIONAL EQUICYCLE Condenser. JO. JDial Setting 100. 150, Get the Genuine. Insist upon NATIONAL COMPANY'S RADIO Products. Your dealer appreciates your patronage and will gladly get them for you. Write for Bulletin m-RB NATIONAL COMPANY, Inc. W. A. Ready, President 110 Brookline St. Cambridge, Mass. ■jt Tested and approved by Radio Broadcast -fa NATIONAL TRANSMITTING CONDENSER