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Proceedings of the Institute of Radio Engineers

Issue 6 • Date June 1929

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  • [Front cover]

    Publication Year: 1929, Page(s): c1
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  • Eastern Great Lakes District Convention, November 18-19, 1929, Rochester, New York

    Publication Year: 1929, Page(s): c2
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  • Contents

    Publication Year: 1929, Page(s): 907
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  • General Information

    Publication Year: 1929, Page(s): 908
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  • Suggestions for Contributors to the Proceedings

    Publication Year: 1929, Page(s): 909
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  • Institute sections

    Publication Year: 1929, Page(s): 910
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  • Lewis M. Hull - Member of the Board of Direction, 1929

    Publication Year: 1929, Page(s): 912
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  • Institute news and radio notes

    Publication Year: 1929, Page(s):913 - 918
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  • Geographical Location of Members Elected May 1, 1929

    Publication Year: 1929, Page(s):919 - 921
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  • Applications for Membership

    Publication Year: 1929, Page(s):922 - 924
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  • Officers and Board of Direction, 1929

    Publication Year: 1929, Page(s):925 - 926
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  • Reciprocity in Electromagnetic, Mechanical, Acoustical, and Interconnected Systems

    Publication Year: 1929, Page(s):927 - 951
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1928 KB)

    Recent criticism by Carson of the statement of the reciprocal relations in a radio communication system given by Sommerfeld is supported by a simple example showing the incorrectness of this statement. Carson's proof of the extention of Rayleigh's reciprocity theorem to a general electromagnetic system was limited to u= 1 and to sources consisting of ponderomotive forces on the electricity. A new ... View full abstract»

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  • Reciprocal Theorems in Radio Communication

    Publication Year: 1929, Page(s):952 - 956
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    Two reciprocal theorems, the generalized Rayleigh theorem and the Sommerfeld-Pfrang theorem are of great theoretical importance in radiocommunication. A careful analysis of these theorems and their mathematical derivations shows that they are quite distinct and their practical fields of application different. In particular it shows that the Sommerfeld-Pfrang theorem labors under restrictions, impl... View full abstract»

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  • The Measurement of Direct Interelectrode Capacitance of Vacuum Tubes

    Publication Year: 1929, Page(s):957 - 965
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2456 KB)

    A method of measuring direct capacitance in the range 10-10to 10-15farads by a charging current at radio frequencies is described. A low resistance current indicator is shunted across one of the direct capacitances. The charging current I = ωEC is a measure of the direct capacitance provided that COE is maintained constant. A simple circuit arrangement provides an appara... View full abstract»

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  • Photoradio Developments

    Publication Year: 1929, Page(s):966 - 984
    Cited by:  Papers (3)
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    First Page of the Article
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  • Grid Losses in Power Amplifiers

    Publication Year: 1929, Page(s):985 - 1005
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2088 KB)

    In spite of the widespread use of radio-frequency power amplifiers, apparently no measurements of the power required to drive such amplifiers have ever been made. In this paper, a study of driving power is made at 60 cycles. It is found that the power input to the grid is proportional to the d-c grid current raised to the 1.34 power. The proportionality factor depends on the type of tube and the p... View full abstract»

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  • Mathematical Theory of the Four-Electrode Tube

    Publication Year: 1929, Page(s):1006 - 1020
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (952 KB)

    This paper gives the mathematics of the four-electrode tube, including in the most general case expressions for the plate and two grid currents in terms of applied voltages in the two grid circuits and the impedances of all three circuits. The results are exact, variation in the amplification factors being included. Because of the complexity of the general equations, these expressions for the curr... View full abstract»

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  • Design Methods for Soft Magnetic Materials in Radio

    Publication Year: 1929, Page(s):1021 - 1033
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1056 KB)

    The present paper is concerned with a study of design methods for soft magnetic materials such as those used in radio broadcast receivers and similar apparatus. The design of such devices as interstaged transformers calls for more than choosing points on curves in a standard handbook and computing mechanical or electrical details by ordinary power transformer theory. Radio transformer design is us... View full abstract»

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  • A New Method of Determining Height of the Kennelly-Heaviside Layer

    Publication Year: 1929, Page(s):1034 - 1041
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    Graphic records of radio signals transmitted from high-frequency aircraft radio transmitters are observed to show periodic variations of fairly constant frequency over considerable time intervals. A theory is evolved connecting this frequency with the transmitting distance, the ground speed of the plane and the effective height of the Kennelly-Heaviside Layer. Records of such periodic fading are r... View full abstract»

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  • Some Observations of Short Period Radio Fading

    Publication Year: 1929, Page(s):1042 - 1061
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2072 KB)

    The data presented are the product of an investigation started at the beginning of 1928 with the object of studying the short-period fading of radio broadcast transmissions. Particular attention was paid to those intensity changes which take place during periods ranging from a few seconds to several minutes. Various antenna combinations were used in making simultaneous records in order to separate... View full abstract»

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  • Discussion on Detection Characteristics of Three-Element Vacuum Tubes (F.E. Terman and T.M. Googin)

    Publication Year: 1929, Page(s): 1062
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  • Monthly list of references to current radio literature

    Publication Year: 1929, Page(s):1063 - 1066
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (427 KB)

    This is a monthly list of references prepared by the Bureau of Standards and is intended to cover the more important papers of interest to professional radio engineers which have recently appeared in periodicals, books, etc. The number at the left of each reference classifies the reference by subject in accordance with the scheme presented in "A Decimal Classification of Radio Subjects - An Extens... View full abstract»

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  • Contributors to this issue

    Publication Year: 1929, Page(s):1067 - 1069
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Aims & Scope

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

Full Aims & Scope