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Proceedings of the Institute of Radio Engineers

Issue 5 • May 1938

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  • [Front cover]

    Publication Year: 1938, Page(s): c1
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  • Institute of Radio Engineers - Forthcoming Meetings

    Publication Year: 1938, Page(s): c2
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  • Contents

    Publication Year: 1938, Page(s): i
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  • General Information

    Publication Year: 1938, Page(s): ii
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  • Institute sections

    Publication Year: 1938, Page(s): iii
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  • Geographical Location of Members Elected April 6, 1938

    Publication Year: 1938, Page(s):iv - v
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  • Applications for Membership

    Publication Year: 1938, Page(s):vi - vii
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  • Officers and Board of Directors

    Publication Year: 1938, Page(s): viii
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  • Heinrich Hertz, 1857-1894

    Publication Year: 1938, Page(s): 492
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  • Institute news and radio notes

    Publication Year: 1938, Page(s):493 - 504
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  • Hertz, The Discoverer of Electric Waves

    Publication Year: 1938, Page(s):505 - 515
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1256 KB)

    First Page of the Article
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  • Stability of Two-Meter Waves

    Publication Year: 1938, Page(s):516 - 528
    Cited by:  Papers (7)
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    The continuous records of the field strength received over a 60-kilometer path on a frequency of 150 megacycles for the year 1936 are analyzed. Preliminary comparison with other paths of the same length indicate that the magnitude of the recorded variations of the signals may be typical of paths of this length. A reduction in the path length by a factor of two reduced the fading range in decibels ... View full abstract»

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  • Negative-Ion Components in the Cathode-Ray Beam

    Publication Year: 1938, Page(s):529 - 539
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2184 KB)

    The cathode-ray beams of electrostatically focused cathode-ray tubes were studied by mass spectrographic methods. The negative-ion components focused on the fluorescent screens were made evident by their ability to change the fluorescent qualities of the screen material. Persistent appearance of m/e values of 16, 26, 35, and 37 in the tubes studied were due to oxygen, some organic molecule, as C View full abstract»

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  • The Fine Structure of Television Images

    Publication Year: 1938, Page(s):540 - 575
    Cited by:  Papers (27)
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    There are described the necessary or preferred relations in the fine structure of television scanning, so chosen as to yield a system which is both theoretically ideal and practically optimum. The relations involve the width and spacing of the lines and the intensity distribution of circular scanning spots in both transmitter and receiver, which are correlated with the filter characteristics and t... View full abstract»

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  • Concentric Narrow-Band-Elimination Filter

    Publication Year: 1938, Page(s):576 - 589
    Cited by:  Papers (2)
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    A type of wave filter employing a concentric transmission line is described. Filters of this type are especially applicable to ultra-high-frequency operation where their physical size becomes reasonable and where the conventional lumped-constant filters become practically unrealizable. It is shown that the addition of a simple lumped-reactance element will result in a sharp cutoff characteristic a... View full abstract»

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  • Theory of the Discriminator Circuit for Automatic Frequency Control

    Publication Year: 1938, Page(s):590 - 611
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1752 KB)

    The theory of the frequency-discriminator circuit which is used in radio receivers equipped with automatic frequency control is worked out. Formulas for computing gain, frequency-control sensitivity, adjacent-channel attentuation, pull-in range, etc., are developed. These formulas apply to any value of primary or secondary inductance and to any value of coil quality factor. The loading represented... View full abstract»

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  • Grid-Current Flow as a Factor in the Design of Vacuum-Tube Power Amplifiers

    Publication Year: 1938, Page(s):612 - 639
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2264 KB)

    In the design of class C amplifiers analytical methods have been proposed which give good results from the standpoint of plate-circuit operating condition. Similar methods have not been available for the determination of grid-circuit conditions. It is the purpose of this paper to describe a method by which this result can be obtained. An analytical determination of grid-circuit operating condition... View full abstract»

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  • Characteristics of the Ionosphere at Washington, D.C., March, 1938

    Publication Year: 1938, Page(s):640 - 643
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    Data on the ordinary-wave critical frequencies and virtual heights of the ionospheric layers are presented for the period indicated in the title. The monthly average values of the maximum usable frequencies for undisturbed days, for radio transmission by way of the regular layers is also provided. View full abstract»

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  • Book review

    Publication Year: 1938, Page(s): 644
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  • Contributors to this issue

    Publication Year: 1938, Page(s):645 - 646
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Aims & Scope

This Periodical ceased production in 1938. The current retitled publication is Proceedings of the IEEE.

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