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Proceedings of the Institute of Radio Engineers

Issue 7 • Date July 1931

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Displaying Results 1 - 25 of 29
  • [Front cover]

    Publication Year: 1931, Page(s): c1
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  • Future Events

    Publication Year: 1931, Page(s): c2
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  • Table of contents

    Publication Year: 1931, Page(s): i
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  • General Information

    Publication Year: 1931, Page(s): ii
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  • Suggestions for Contributors to the Proceedings

    Publication Year: 1931, Page(s): iii
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  • Institute sections

    Publication Year: 1931, Page(s): iv
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  • Geographical Location of Members Elected June 1, 1931

    Publication Year: 1931, Page(s):v - vi
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  • Applications for Membership

    Publication Year: 1931, Page(s):vii - viii
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  • Officers and Board of Direction, 1931

    Publication Year: 1931, Page(s): ix
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  • Lloyd Espenschied

    Publication Year: 1931, Page(s): 1102
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  • Institue News and Radio Notes

    Publication Year: 1931, Page(s):1103 - 1110
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  • Notes on Loud Speaker Response Measurements and Some Typical Response Curves

    Publication Year: 1931, Page(s):1111 - 1130
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2424 KB)

    The difficulties encountered in loud speaker measurements are briefly reviewed and a description of the acoustic features of a particular indoor measuring system is given. Outdoor testing arrangements are described whereby double as well as single radiating loud speakers are measured with negligible ground reflection error. It is pointed out that the over-all electrical fidelity curve of a radio r... View full abstract»

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  • High audio power from relatively small tubes

    Publication Year: 1931, Page(s):1131 - 1149
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1617 KB)

    The author presents a method by which audio outputs five to ten times the usual output of a tube of a given size may be obtained with the same plate voltage, lower average plate dissipation, and no serious effects on the tube. The above results are obtained by using the tubes in such a manner that advantage is taken of the essential features of the class "B" amplifier. An amplifier of this type' w... View full abstract»

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  • Notes on Radio Transmission

    Publication Year: 1931, Page(s):1150 - 1165
    Cited by:  Papers (5)
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    Considerable data on radio transmission have been obtained the past few years in connection with the establishment and operation of various radio-telephone services by the Bell System. It is the purpose of these notes to present certain aspects of some of these data which may be of interest in the development of a general physical picture of radio transmission and in indicating the effects of dist... View full abstract»

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  • A Note on the Relation of Meteor Showers and Radio Reception

    Publication Year: 1931, Page(s):1166 - 1170
    Cited by:  Papers (11)
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    A comparison of reception measures with meteor showers over five-year periods indicates an accompanying increase of night fields and a decrease of day fields. The highest correlation appeared between monthly means of meteor hour rates and night fields. No associated disturbance of terrestrial magnetism was found. View full abstract»

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  • The Cooperation Committee Program for 1930-1931

    Publication Year: 1931, Page(s):1171 - 1174
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    The French government radio authorities began transmitting daily Ursigrams from the Eiffel Tower (FLE) in Paris, on 1 December 1928. This service has since been regularly maintained and extended to corresponding daily emissions from FLY Lafayette Station near Bordeaux and FYB Paris-Pontoise. Both emissions are made at 20.30 GMT and in clear (uncoded) French language. Commencing with 1 August 1930,... View full abstract»

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  • Temperature Rating of Engine Driven Aircraft Radio Generators

    Publication Year: 1931, Page(s):1175 - 1183
    Cited by:  Papers (1)
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    Previously described methods of temperature measurement and computation are applied to engine driven aircraft radio generators in flight. Observed and computed heating curves are shown from which an emission constant for this type of machine has been derived. View full abstract»

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  • Theoretical and Practical Aspects of Directional Transmitting systems

    Publication Year: 1931, Page(s):1184 - 1215
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3272 KB)

    This paper discusses some of the more important principles involved in the development of the directional transmitting antennas at present employed in the Bell System short-wave facilities. The theoretical performance of directive arrays is presented by means of various curves which have been obtained by integrations based upon Poynting's theorem. The details of the mathematical derivations are om... View full abstract»

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  • Measurements on magnetostriction vibrators

    Publication Year: 1931, Page(s):1216 - 1232
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1632 KB)

    The study of electromechanical vibrating systems through the measurement of motional impedance was first undertaken by Kennelly and Pierce in 1912, in their work on telephone receivers. The method was applied by K.C. Black in 1928 to the study of ferromagnetic rods centrally clamped and lying along the axis of a coil carrying alternating current superposed upon direct current. The work of Mr Black... View full abstract»

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  • Note on Radio-Frequency Transformer Coupled Circuit Theory

    Publication Year: 1931, Page(s):1233 - 1241
    Cited by:  Papers (2)
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    Equations considering the effects of output and distributed capacities and primary resistance are developed for radio-frequency transformer-coupled amplifiers using either a tuned or an untuned primary. These equations are transformed to such a form that they may be compared with the well-known equations derived for an untuned primary neglecting the output and distributed capacities. The equations... View full abstract»

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  • Measuring Frequency Characteristics with the Photo-Audio Generator

    Publication Year: 1931, Page(s):1242 - 1251
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1584 KB)

    A special alternating-current generator, a photo-audio generator, is used to good advantage as a source of current for measurements of variability with frequency. Compared with the known audio generators (tube generator with or without superposition) hitherto used for the same purpose, the photo-audio generator has the advantage of greater simplicity. The sources of error, as regards sine shape of... View full abstract»

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  • Performance of Piezo-Oscillators and the Influence of the Decrement of Quartz on the Frequency Oscillations

    Publication Year: 1931, Page(s):1252 - 1273
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1640 KB)

    In Part I of this paper, the performance of piezo oscillators of the usual Pierce circuits is treated, on the basis of the resonance curves of the quartz (taken experimentally) and with the help of vector diagrams. In Part II, the influence of the decrement of the quartz resonator on the oscillation frequency is examined. This study has led to the development of an arrangement which permits the qu... View full abstract»

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  • The Operating Frequency of Regenerative Oscillatory Systems

    Publication Year: 1931, Page(s):1274 - 1277
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The operating frequency of regenerative oscillatory systems is quantitatively derived in terms of the natural frequency, the damping constant, and the phase of the driving force. As an example the results are used to calculate the change in rate of a pendulum clock due to a given variation in the phase of the driving impulses. Applications to other types of systems are briefly indicated. View full abstract»

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  • Supplementary note to the "Study of the High-Frequency Resistance of Single Layer Coils"

    Publication Year: 1931, Page(s):1278 - 1280
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    Since the publication of the above paper in the December, 1930, number of the Proceedings of the IRE, the attention of the authors has been called to two articles on the alternating-current resistance of solenoidal coils, by S. Butterworth, which they regret to state were overlooked in the preparation of the original paper. In the first of these articles (Phys. Rev., 11, 752-755; June, 1924) Butte... View full abstract»

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  • Discussion of Oscillation in Tuned Radio-Frequency Amplifiers, by B.J. Thompson

    Publication Year: 1931, Page(s):1281 - 1282
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (178 KB)

    B.J. Thompson in the above referenced article (ibid., vol 19, pp 421, Mar 1931) makes the following statement - "Hull and more lately Nelson have analyzed the conditions for stability in terms of the maximum amplification per stage, ignoring the allimportant effect of feed-back on amplification." He evidently did not understand the significance of the symbol Av in either of the above articles. The... View full abstract»

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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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