Radio age (May 1922-Dec 1923)

Page scan 000177 from Radio age

Record Details:

Title:
Radio age
Date:
May 1922-Dec 1923
Publisher:
Chicago : M. B. Smith Publishing Co.
Volume:
Radio age (May 1922-Dec 1923)
Leaf #:
000177
Language:
English
Subjects:
Radio Periodicals, Radio -- Periodicals
Collection:
Fan Magazines and Broadcasting & Recorded Sound
Format:
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:
Originally Motion Picture Classic (first issue 1915), renamed Movie Classic in September 1931. Sold as 'The Newsreel of the Newstands'; on par with Picture Play and Screenland in terms of content, quality, and circulation (solid but below that of Photoplay, et. al.) until it was absorbed by Motion Picture in 1937. -- Anne Helen Petersen, 2013. Secondary sources consulted: Inside the Hollywood Fan Magazine by Anthony Slide and MovieMags.com.
Date Added:
August 01, 2024
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RADIO AGE— "THE MAGAZINE OF THE HOUR" How to Add One Step of Radio and One Step of Audio Frequency to the i^ I i By F. D. PEARNE WHILE wonderful results have been reported by the makers of the Reinartz set described in the September issue of this magazine and republished in this number, some of which showed reception from distances of 2,500 miles, still there are some of our readers who are anxious to see what this instrument will do with one or two stages of radio frequency added to]^it. Many amateurs seem to have an idea that radio frequency will add to the volume of the signals received, but this is an error, as I will show by a brief explanation. Most all of our readers know that "radio frequency" is that in which the oscillations are too rapid to be heard by the human ear (usually calculated at 10,000 per second or more), while those frequencies which are audible (below 10,000 per second) are spoken of as audio frequencies. The function of the detector tube is to rectify the radio frequency oscillations and bring them down to audio frequency. As the vacuum tube is also capable of magnifying the signals to some considerable extent, the detector may be termed both a rectifier and a relay. Now let us consider a case in which one step of radio frequency amplification has been prefixed to the detector tube. An amplifier, or "hard" tube is used for this purpose. As all signals which are received upon the aerial come in at radio frequency and as they first enter the amplifying tube (the nature of which is to amplify, rather than to rectify) the signals are greatly amplified, or increased at SERIAL f ST STEP RADIO FREQUENC Y "^UDIO FREQUENC Y r-S'^?!,?r.,r^ TRANSFORMER. TRmSEORMER. FREQUENCK | ^ _^,^ j Ronmz 5r5TEM. 0NE3TEPR/\m rmUENCY. DETECTOR AND OHEmGL AUDIO FEEQUEHCY.