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Proceedings of the Institute of Radio Engineers

Issue 5 • Date May 1931

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Displaying Results 1 - 25 of 28
  • [Front cover]

    Publication Year: 1931, Page(s): c1
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  • Tentative Program of Sixth Annual Convention Institute of Radio Engineers, Chicago, Illinois, June 4, 5, and 6, 1931

    Publication Year: 1931, Page(s): c2
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  • 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 April 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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  • Arthur H. Compton [lecture announcement]

    Publication Year: 1931, Page(s): 696
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  • Institute news and radio notes

    Publication Year: 1931, Page(s):697 - 721
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  • Output Networks for Radio-Frequency Power Amplifiers

    Publication Year: 1931, Page(s):723 - 737
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    At high frequencies a transformer consisting of primary, secondary, and mutual inductances cannot be constructed to match a generator effectively to a resistive load. By introducing capacitative elements, such a match can be obtained. The design of reactance networks to connect a resistive load efficiently to a source of power can be carried out most conveniently by the theory of image impedances.... View full abstract»

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  • Theory and Operation of Tuned Radio-Frequency Coupling Systems

    Publication Year: 1931, Page(s):738 - 803
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (9328 KB)

    The subject is the tuned r-f coupling systems commonly used in broadcast receivers, to couple the antenna to the grid of the first tube, and to couple the plate of each r-f amplifier tube to the grid of the following tube. The simple tuned r-f transformer used in the 1923 neutrodyne receiver has been improved by the cooperation of different kinds of impedances in the primary circuit. The "equivale... View full abstract»

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  • Discussion

    Publication Year: 1931, Page(s):804 - 805
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  • Test Procedure for Detectors with Resistance Coupled Output

    Publication Year: 1931, Page(s):806 - 811
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    This paper presents a simple circuit for use primarily in determining the response, to modulation, of a detector with resistance coupled output Only d-c, 60-cycle a-c, and the corresponding meters are used. The theory of operation of the circuit is briefly explained: This theory neglects the effects of capacity reactances at modulation frequencies but not at carrier frequencies. Sample curves obta... View full abstract»

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  • Radiation Measurements of a Short-Wave Directive Antenna at the Nauen High Power Radio Station

    Publication Year: 1931, Page(s):812 - 838
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2784 KB)

    This paper is a report on the experimental investigation of the, raidiation of a short-wave directive antenna at Nauen. Measurements were made on the ground and also in the air, using an airplane. The results, plotted in the form of radiation characteristic curves, were compared with calculated radiation characteristics. In the case of the horizontal radiation characteristic the agreement between ... View full abstract»

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  • On the Amplitude of Driven Loud Speaker Cones

    Publication Year: 1931, Page(s):839 - 850
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1728 KB)

    Bragg's method for measuring small amplitudes of vibration was developed technically for the measurement of amplitudes of driven loud speaker cones. It is shown, that amplitudes of 1 micron at 500 cycles may easily be measured within a few per cent. Nodes of symmetrical cones may be radial or circular. It is shown that radial nodes do not influence the effective sound radiation area and the effect... View full abstract»

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  • Engineering Testimony before Official Bodies

    Publication Year: 1931, Page(s):851 - 855
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    This paper discusses the requirements for the effective presentation of testimony on engineering subjects. The most important qualifications of a witness on technical matters are: (1) The ability to present technical facts in lay language such that persons without technical training and unfamiliar with the technical terms of the profession are able to grasp the significance of his evidence. (2) Th... View full abstract»

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  • Oscillations in the Circuit of a Strongly Damped Triode

    Publication Year: 1931, Page(s):856 - 872
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2504 KB)

    The following is a study of the particular action produced by a triode oscillator when the relation of the inductance to the capacity, L/C, is greater than the square of the interval resistance, ρ2, and when the reactive coupling between plate and grid is greater than the limit required for starting oscillation. The shape of the oscillation curve is clearly other than sinusoidal, t... View full abstract»

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  • Selectivity, a Simplified Mathematical Treatment

    Publication Year: 1931, Page(s):873 - 881
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    This paper gives a simple formula for finding the voltage gain of a resonant circuit at different frequencies in terms of that at resonance. Tables and curves are given in decibels below the resonant value so that calculations are quickly made. Means of converting the ordinary radio-frequency circuit into an equivalent simple resonant circuit are given so that a close approximation of its behaviou... View full abstract»

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  • Effects of Sun Spots and Terrestrial Magnetism on Long-Distance Reception of Low-Frequency Waves

    Publication Year: 1931, Page(s):882 - 890
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    Daily average variations of sun spots and field intensity are not simply related. What mostly occurs are the effects which vary as the period of the sun's rotation and one-half thereof. Phase relations are generally found in about 180 degrees and 90 degrees. There is no indication of different effects between daylight and darkness waves. The relation between their monthly average variations is, in... View full abstract»

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  • Reflection of Electromagnetic Waves at Ionized Media with Variable Conductivity and Dielectric Constant

    Publication Year: 1931, Page(s):891 - 907
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1392 KB)

    Using the electrical properties obtained by the higher atmosphere on account of the ionization caused by the ultra-violet radiation of the sun and the corpuscular rays sent out from it conclusions are drawn about the height where electromagnetic waves are reflected and the reflected amplitude. In this way results can be obtained in good agreement with the observations. The influence of hydrogen in... View full abstract»

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  • Correction [to "An analysis of a piezo-electric oscillator circuit," by L.P. Wheeler, ibid., Apr, 1931, pp 641]

    Publication Year: 1931, Page(s): 908
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (79 KB)

    The author has brought to the attention of the editorial staff of the Proceedings the following corrections to his paper, "An Analysis of a Piezo-Electric Oscillator Circuit," which appeared on page 641 of the April, 1931, issue of the Proceedings. In equations (31) and (32) the factor "Re/Le" is corrected. This error, which unfortunately was not discovered until after the pr... View full abstract»

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  • Erratum - A system for suppressing hum by a new filter arrangement, by Palmer E. Craig

    Publication Year: 1931, Page(s): 908
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    The April, 1931, issue of the PROCEEDINGS contained an error in the above-named work. Page 669, line 7 is corrected. View full abstract»

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  • Book review

    Publication Year: 1931, Page(s): 909
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Aims & Scope

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

Full Aims & Scope