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Proceedings of the Institute of Radio Engineers

Issue 8 • Date Aug. 1928

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  • [Front cover]

    Publication Year: 1928, Page(s):c1 - c2
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  • Suggestions for Contributors to the Proceedings

    Publication Year: 1928, Page(s): 1018
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  • Contents

    Publication Year: 1928, Page(s): 1019
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  • General Information

    Publication Year: 1928, Page(s): 1019
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  • Officers and Board of Direction, 1928

    Publication Year: 1928, Page(s):1020 - 1022
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  • Jonathan Zenneck [Biography]

    Publication Year: 1928, Page(s):1024 - 1025
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  • The Institute Medal of Honor

    Publication Year: 1928, Page(s):1026 - 1027
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  • Contributors to this issue

    Publication Year: 1928, Page(s):1029 - 1030
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  • Institute activities

    Publication Year: 1928, Page(s):1031 - 1034
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  • Erratum

    Publication Year: 1928, Page(s): 1034
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  • A New Type of Standard Frequency Piezo-Electric Oscillator

    Publication Year: 1928, Page(s):1035 - 1044
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2672 KB)

    In this paper is described a system for producing alternating current of audible frequency of a very high degree of precision. The chief novelty in the system consists in the manner in which the energy necessary to sustain the oscillations of the quartz bar is returned to it. This "feed-back" is accomplished acoustically and the extremely loose coupling thereby secured insures that the generated f... View full abstract»

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  • The Effect of Regeneration on the Received Signal Strength

    Publication Year: 1928, Page(s):1045 - 1052
    Cited by:  Papers (1)
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    It is the purpose of this paper to give a theory of the effect of regeneration using the solution of a non-linear differential equation, and to present experimental verification of the theory. It is shown that: (a) as a first approximation, detection has no effect on the radio-frequency grid voltage developed under the influence of an incoming signal, (b) the amplification obtained through regener... View full abstract»

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  • Characteristics of Output Transformers

    Publication Year: 1928, Page(s):1053 - 1064
    Cited by:  Papers (2)
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    The paper deals with the operating characteristics of the Output Transformer, which are developed in terms of the known speaker, tube and transformer constants. In the first part of the paper the general formula for the speaker current is developed and the effect of varying the transformer constants shown. The turn ratio of the transformer for maximum speaker current is considered in relation to t... View full abstract»

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  • Cooperation between the Institute of Radio Engineers and Manufacturers' Associations

    Publication Year: 1928, Page(s):1065 - 1071
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  • Notes on Quartz Plates, Air Gap Effect, and Audio-Frequency Generation

    Publication Year: 1928, Page(s):1072 - 1076
    Cited by:  Papers (2)
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    Experiments on the frequency of piezo-electric elements are described with special reference to the effect due to supersonic sound waves generated in the air gap of the holder and due to its capacity. It is shown that a mechanical load on the crystal increases its thickness frequency and that an air gap has a similar effect. The velocity of the supersonic sound waves is about the same as for ordin... View full abstract»

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  • Notes on Aperiodic Amplification and Application to the Study of Atmospherics

    Publication Year: 1928, Page(s):1077 - 1078
    Cited by:  Papers (1)
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    It is shown that ordinary amplifiers cannot produce true repeater action when aperiodic transients are impressed on the system. The output current can, however, be interpreted in terms of the coupling. For true aperiodic amplification the time constants have to be chosen such that the system gives true repeater action. An aperiodic amplifier using space-charge tubes is shown. View full abstract»

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  • Effect of the Antenna in Tuning Radio Receivers and Methods of Compensating for It

    Publication Year: 1928, Page(s):1079 - 1088
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    The reflected effect of the primary circuit of a resonance transformer, or of the antenna circuit of a radio receiver, upon the secondary coupled to it, is discussed. Equations are given for determining the apparent change of inductance in the secondary and methods of compensating for these changes are given. View full abstract»

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  • The Cause and Prevention of Hum in Receiving Tubes Employing Alternating Current Direct on the Filament

    Publication Year: 1928, Page(s):1089 - 1106
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2784 KB)

    The various factors affecting the variation of plate current of a receiving tube when the filament is heated with a.c. are analyzed, and their composite effect considered. The variation in temperature of the filament is found to be of minor importance while the predominant factor is the voltage drop along the cathode. The smallest variation in Ipis obtained from a tube having a properly... View full abstract»

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  • The International Union of Scientific Radio-Telegraphy

    Publication Year: 1928, Page(s):1107 - 1112
    Cited by:  Papers (1)
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    First Page of the Article
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  • The Tuned-Grid, Tuned-Plate, Self-Oscillating Vacuum-Tube Circuit

    Publication Year: 1928, Page(s):1113 - 1117
    Cited by:  Papers (2)
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    Certain discrepancies in published reports on this circuit are pointed out and it is shown that the frequency of oscillation is given by the real terms and the necessary condition for these oscillations to start by the imaginary terms of the general equation. Equations are set up for the frequency and for the necessary conditions for the generation of oscillations of a frequency determined by the ... View full abstract»

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  • Radiation and Induction

    Publication Year: 1928, Page(s):1118 - 1132
    Cited by:  Papers (1)
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    In this paper the formulas for induction fields are derived in two elementary ways. From the definition of potential and by means of analogy the form of the vector potential, A = Ih/x is obtained. From this the formulas for radiation fields are given following Dellinger's derivation. The second part of the paper gives experimental data verifying the formulas for radiation and induction when the di... View full abstract»

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  • Development of a System of Line Power for Radio

    Publication Year: 1928, Page(s):1133 - 1148
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    A short history of the development of power supply apparatus for radio receivers is given, including a brief discussion of the technical requirements, such as the most desirable suppression characteristics, the necessity for voltage regulation, etc. The various devices which have been developed are described. The present status of the art and the scope and limitations of the different types of app... View full abstract»

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  • Book review

    Publication Year: 1928, Page(s): 1149
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  • Monthly list of references to current radio literature

    Publication Year: 1928, Page(s):1150 - 1155
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    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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  • Applications for Membership

    Publication Year: 1928, Page(s):1156 - 1158
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Aims & Scope

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

Full Aims & Scope