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The television image would be viewed through the cone. The image was 1.5 inches square (4 by 4 cm) and had 48 scan lines at 7.5 frames per second. (This was a low definition "48p" display.) The man is using a 125 hertz tuning fork to adjust the scanning wheel to 450 RPM. By looking through the tuning
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497:== Summary == {{Information | Description= ''Science & Invention'', November 1928. Volume 16 Number 7. Hugo Gernsback Editor-in-Chief. Cover Art by R. E. Pattiani. Published by Experimenter Publishing Company. New York, NY. The page numbers were on an
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Perfection 1240U at 300 dpi with half-tone de-screening enabled and stored as TIFF. The image was cropped and touched up in Adobe Photo Elements 5.0. This copy saved as a 100 dpi JPG.
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Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the
Commons. If the work is not a U.S. work, the file
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would have the copyright renewed in 1955. Online page scans of the
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ceased publication with the August 1931 issue. A search of the copyright renewal records from 1951 to 1959 shows no entries for
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fork at the line pattern on the hub, he could see when the wheel was at the correct speed.
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191:"How to build the S&I Television Receiver" starts on page 618.
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Magazine published
November 1928, this page scanned July 2008.
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indicating the copyright status in the source country.
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Commons is a freely licensed media file repository.
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